./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y --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 68fe5d136456ecb82ea00426715bf936d3e38ca581ddd26cec97e5010ad5777c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:59,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:59,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:59,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:59,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:59,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:59,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:59,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:59,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:59,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:59,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:59,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:59,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:59,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:59,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:59,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:59,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:59,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:59,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:59,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:59,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:59,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:59,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:59,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:59,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:59,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:59,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:59,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:59,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:59,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:59,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:59,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:59,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:59,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:59,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:59,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:59,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:59,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:59,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:59,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:59,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:59,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:45:59,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:59,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:59,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:59,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:59,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:59,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:59,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:59,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:59,911 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:59,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:59,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:59,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:45:59,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:45:59,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:59,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:59,914 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:45:59,914 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:45:59,914 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:45:59,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:59,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:45:59,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:59,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:59,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:59,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:59,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:59,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:59,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:59,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:59,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:45:59,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:45:59,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:59,920 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_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68fe5d136456ecb82ea00426715bf936d3e38ca581ddd26cec97e5010ad5777c [2021-11-13 18:46:00,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:00,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:00,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:00,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:00,254 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:00,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c [2021-11-13 18:46:00,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/b4a83eac8/94a4b071994940eab9965bb4d8db1e8b/FLAG4ef774bf9 [2021-11-13 18:46:00,898 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:00,898 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c [2021-11-13 18:46:00,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/b4a83eac8/94a4b071994940eab9965bb4d8db1e8b/FLAG4ef774bf9 [2021-11-13 18:46:01,253 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/b4a83eac8/94a4b071994940eab9965bb4d8db1e8b [2021-11-13 18:46:01,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:01,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:46:01,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:01,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:01,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:01,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:01" (1/1) ... [2021-11-13 18:46:01,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a4de2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:01, skipping insertion in model container [2021-11-13 18:46:01,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:01" (1/1) ... [2021-11-13 18:46:01,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:01,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:01,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:01,522 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) [2021-11-13 18:46:01,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14aa067e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:01, skipping insertion in model container [2021-11-13 18:46:01,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:01,523 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-13 18:46:01,526 INFO L158 Benchmark]: Toolchain (without parser) took 267.17ms. Allocated memory is still 123.7MB. Free memory was 91.4MB in the beginning and 101.9MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:46:01,527 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:01,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.54ms. Allocated memory is still 123.7MB. Free memory was 91.2MB in the beginning and 101.9MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:46:01,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.54ms. Allocated memory is still 123.7MB. Free memory was 91.2MB in the beginning and 101.9MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 15]: 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_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y --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 68fe5d136456ecb82ea00426715bf936d3e38ca581ddd26cec97e5010ad5777c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:46:04,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:46:04,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:46:04,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:46:04,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:46:04,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:46:04,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:46:04,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:46:04,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:46:04,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:46:04,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:46:04,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:46:04,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:46:04,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:46:04,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:46:04,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:46:04,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:46:04,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:46:04,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:46:04,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:46:04,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:46:04,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:46:04,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:46:04,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:46:04,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:46:04,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:46:04,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:46:04,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:46:04,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:46:04,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:46:04,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:46:04,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:46:04,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:46:04,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:46:04,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:46:04,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:46:04,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:46:04,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:46:04,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:46:04,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:46:04,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:46:04,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-13 18:46:04,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:46:04,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:46:04,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:46:04,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:46:04,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:46:04,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:46:04,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:46:04,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:46:04,314 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:46:04,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:46:04,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:46:04,315 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:46:04,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:46:04,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:46:04,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:46:04,316 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:46:04,317 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:46:04,317 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:46:04,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:46:04,317 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:46:04,318 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:46:04,318 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:46:04,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:46:04,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:46:04,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:46:04,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:46:04,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:46:04,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:04,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:46:04,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:46:04,321 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:46:04,325 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:46:04,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:46:04,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:46:04,326 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_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68fe5d136456ecb82ea00426715bf936d3e38ca581ddd26cec97e5010ad5777c [2021-11-13 18:46:04,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:04,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:04,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:04,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:04,771 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:04,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c [2021-11-13 18:46:04,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/13da6563f/469e3defd71a41da91a2ea402e26b3bd/FLAGf95439cc1 [2021-11-13 18:46:05,531 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:05,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c [2021-11-13 18:46:05,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/13da6563f/469e3defd71a41da91a2ea402e26b3bd/FLAGf95439cc1 [2021-11-13 18:46:05,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/data/13da6563f/469e3defd71a41da91a2ea402e26b3bd [2021-11-13 18:46:05,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:05,923 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:46:05,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:05,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:05,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:05,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:05" (1/1) ... [2021-11-13 18:46:05,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4adf7d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:05, skipping insertion in model container [2021-11-13 18:46:05,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:05" (1/1) ... [2021-11-13 18:46:05,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:05,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:06,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:06,115 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 18:46:06,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:06,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:06,129 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:46:06,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:06,167 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:46:06,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06 WrapperNode [2021-11-13 18:46:06,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:06,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:46:06,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:46:06,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:46:06,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:46:06,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:46:06,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:46:06,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:46:06,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (1/1) ... [2021-11-13 18:46:06,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:06,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:46:06,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:46:06,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:46:06,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:46:06,354 INFO L138 BoogieDeclarations]: Found implementation of procedure areNatural [2021-11-13 18:46:06,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure areNatural [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:46:06,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:46:06,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:46:06,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:46:06,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:46:06,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:46:06,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:46:06,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:46:06,641 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:46:06,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:06 BoogieIcfgContainer [2021-11-13 18:46:06,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:46:06,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:46:06,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:46:06,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:46:06,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:46:05" (1/3) ... [2021-11-13 18:46:06,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2266b96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:06, skipping insertion in model container [2021-11-13 18:46:06,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:06" (2/3) ... [2021-11-13 18:46:06,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2266b96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:06, skipping insertion in model container [2021-11-13 18:46:06,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:06" (3/3) ... [2021-11-13 18:46:06,654 INFO L111 eAbstractionObserver]: Analyzing ICFG naturalNumbers1.c [2021-11-13 18:46:06,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:46:06,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-13 18:46:06,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:46:06,724 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 [2021-11-13 18:46:06,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-13 18:46:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:46:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:46:06,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:06,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:06,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting areNaturalErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION] === [2021-11-13 18:46:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1845664052, now seen corresponding path program 1 times [2021-11-13 18:46:06,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:06,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43671136] [2021-11-13 18:46:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:06,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:06,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:06,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:06,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:46:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:46:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:07,062 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 [2021-11-13 18:46:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:07,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:07,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43671136] [2021-11-13 18:46:07,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43671136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:07,313 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:07,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:46:07,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737247426] [2021-11-13 18:46:07,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:07,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:07,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:46:07,374 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-13 18:46:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:07,505 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-13 18:46:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:46:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 10 [2021-11-13 18:46:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:07,530 INFO L225 Difference]: With dead ends: 21 [2021-11-13 18:46:07,535 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:46:07,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:07,545 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:07,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 68.73ms Time] [2021-11-13 18:46:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:46:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-13 18:46:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-13 18:46:07,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2021-11-13 18:46:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:07,597 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-13 18:46:07,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-13 18:46:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-13 18:46:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:46:07,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:07,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:07,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:07,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:07,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting areNaturalErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION] === [2021-11-13 18:46:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1845664051, now seen corresponding path program 1 times [2021-11-13 18:46:07,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:07,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378459205] [2021-11-13 18:46:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:07,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:07,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:07,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:46:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:46:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:07,919 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 [2021-11-13 18:46:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:08,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:08,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:08,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378459205] [2021-11-13 18:46:08,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378459205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:08,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:08,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-13 18:46:08,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456178269] [2021-11-13 18:46:08,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:08,408 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-13 18:46:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:08,737 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-13 18:46:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:46:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2021-11-13 18:46:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:08,741 INFO L225 Difference]: With dead ends: 28 [2021-11-13 18:46:08,741 INFO L226 Difference]: Without dead ends: 28 [2021-11-13 18:46:08,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:46:08,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:08,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 196.60ms Time] [2021-11-13 18:46:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-13 18:46:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-11-13 18:46:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-13 18:46:08,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10 [2021-11-13 18:46:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:08,752 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-13 18:46:08,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-13 18:46:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-13 18:46:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:46:08,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:08,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:08,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:08,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:08,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION] === [2021-11-13 18:46:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1907814666, now seen corresponding path program 1 times [2021-11-13 18:46:08,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:08,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272932175] [2021-11-13 18:46:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:08,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:08,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:08,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:46:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:46:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:09,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:09,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:09,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272932175] [2021-11-13 18:46:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272932175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:09,925 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:09,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-13 18:46:09,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971991647] [2021-11-13 18:46:09,925 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:09,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:46:09,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:46:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:09,930 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:46:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:10,032 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-13 18:46:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 15 [2021-11-13 18:46:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:10,037 INFO L225 Difference]: With dead ends: 25 [2021-11-13 18:46:10,037 INFO L226 Difference]: Without dead ends: 23 [2021-11-13 18:46:10,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:10,038 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 91.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:10,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 15 Unchecked, 91.30ms Time] [2021-11-13 18:46:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-13 18:46:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-13 18:46:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-13 18:46:10,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-11-13 18:46:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:10,049 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-13 18:46:10,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:46:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-13 18:46:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:46:10,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:10,052 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:10,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:10,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:10,277 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting areNaturalErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION] === [2021-11-13 18:46:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1004346541, now seen corresponding path program 1 times [2021-11-13 18:46:10,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:10,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881973333] [2021-11-13 18:46:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:10,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:10,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:10,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:10,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:46:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:46:10,337 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:46:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:46:10,403 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:46:10,403 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:46:10,404 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location areNaturalErr1REQUIRES_VIOLATION (2 of 3 remaining) [2021-11-13 18:46:10,406 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK (1 of 3 remaining) [2021-11-13 18:46:10,407 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location areNaturalErr0REQUIRES_VIOLATION (0 of 3 remaining) [2021-11-13 18:46:10,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:10,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:10,611 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-13 18:46:10,614 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:46:10,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:46:10 BoogieIcfgContainer [2021-11-13 18:46:10,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:46:10,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:46:10,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:46:10,637 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:46:10,638 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:06" (3/4) ... [2021-11-13 18:46:10,641 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 18:46:10,686 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:46:10,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:46:10,687 INFO L158 Benchmark]: Toolchain (without parser) took 4763.99ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 38.9MB in the beginning and 25.9MB in the end (delta: 12.9MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,688 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 60.8MB. Free memory was 41.9MB in the beginning and 41.9MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:10,688 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.23ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 28.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,688 INFO L158 Benchmark]: Boogie Preprocessor took 72.98ms. Allocated memory is still 60.8MB. Free memory was 28.5MB in the beginning and 44.3MB in the end (delta: -15.9MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,689 INFO L158 Benchmark]: RCFGBuilder took 401.45ms. Allocated memory is still 60.8MB. Free memory was 44.3MB in the beginning and 34.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,689 INFO L158 Benchmark]: TraceAbstraction took 3990.34ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 33.7MB in the beginning and 28.0MB in the end (delta: 5.7MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,690 INFO L158 Benchmark]: Witness Printer took 49.78ms. Allocated memory is still 79.7MB. Free memory was 28.0MB in the beginning and 25.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:46:10,692 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 60.8MB. Free memory was 41.9MB in the beginning and 41.9MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.23ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 28.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.98ms. Allocated memory is still 60.8MB. Free memory was 28.5MB in the beginning and 44.3MB in the end (delta: -15.9MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * RCFGBuilder took 401.45ms. Allocated memory is still 60.8MB. Free memory was 44.3MB in the beginning and 34.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3990.34ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 33.7MB in the beginning and 28.0MB in the end (delta: 5.7MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. * Witness Printer took 49.78ms. Allocated memory is still 79.7MB. Free memory was 28.0MB in the beginning and 25.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 4]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L13] char numbers[] = {0,1,2,3,4,5,6,7,8,9}; VAL [numbers={3:0}] [L15] CALL areNatural((int*) numbers) VAL [numbers={3:0}] [L2] int i = 0; VAL [i=0, numbers={3:0}, numbers={3:0}] [L3] COND TRUE i < 10 VAL [i=0, numbers={3:0}, numbers={3:0}] [L4] EXPR numbers[i] VAL [i=0, numbers={3:0}, numbers={3:0}, numbers[i]=50462976] [L4] COND FALSE !(numbers[i] <= 0) [L7] i++ VAL [i=1, numbers={3:0}, numbers={3:0}] [L3] COND TRUE i < 10 VAL [i=1, numbers={3:0}, numbers={3:0}] [L4] EXPR numbers[i] VAL [i=1, numbers={3:0}, numbers={3:0}, numbers[i]=117835012] [L4] COND FALSE !(numbers[i] <= 0) [L7] i++ VAL [i=2, numbers={3:0}, numbers={3:0}] [L3] COND TRUE i < 10 VAL [i=2, numbers={3:0}, numbers={3:0}] [L4] numbers[i] - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 4]: 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 4 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67 SdHoareTripleChecker+Valid, 356.63ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 176 SdHoareTripleChecker+Invalid, 305.20ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 15 IncrementalHoareTripleChecker+Unchecked, 134 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 89 IncrementalHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 42 mSDtfsCounter, 89 mSolverCounterSat, 12.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 64 ConstructedInterpolants, 6 QuantifiedInterpolants, 680 SizeOfPredicates, 10 NumberOfNonLiveVariables, 147 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-13 18:46:10,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace308c6-64fb-48e2-a8a7-0e4617cecb01/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)