./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9988836ddee06b99001d03a87a3e72125eac1288 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9988836ddee06b99001d03a87a3e72125eac1288 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:05:11,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:05:11,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:05:11,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:05:11,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:05:11,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:05:11,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:05:11,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:05:11,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:05:11,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:05:11,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:05:11,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:05:11,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:05:11,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:05:11,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:05:11,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:05:11,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:05:11,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:05:11,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:05:11,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:05:11,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:05:11,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:05:11,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:05:11,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:05:11,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:05:11,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:05:11,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:05:11,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:05:11,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:05:11,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:05:11,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:05:11,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:05:11,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:05:11,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:05:11,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:05:11,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:05:11,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:05:11,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:05:11,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:05:11,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:05:11,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:05:11,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:05:11,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:05:11,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:05:11,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:05:11,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:05:11,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:05:11,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:05:11,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:05:11,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:05:11,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:05:11,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:05:11,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:05:11,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:05:11,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:05:11,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:05:11,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:05:11,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:05:11,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:05:11,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:05:11,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:05:11,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:05:11,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:05:11,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:05:11,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:05:11,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:05:11,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:05:11,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:05:11,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:05:11,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:05:11,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:05:11,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:05:11,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:05:11,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:05:11,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:05:11,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:05:11,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:05:11,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:05:11,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:05:11,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:05:11,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:05:11,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9988836ddee06b99001d03a87a3e72125eac1288 [2021-10-16 02:05:12,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:05:12,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:05:12,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:05:12,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:05:12,192 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:05:12,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i [2021-10-16 02:05:12,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/51994282e/3459e6b4c3d54b5a999c6387c57cddd3/FLAG6aecf4736 [2021-10-16 02:05:12,889 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:05:12,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i [2021-10-16 02:05:12,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/51994282e/3459e6b4c3d54b5a999c6387c57cddd3/FLAG6aecf4736 [2021-10-16 02:05:13,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/51994282e/3459e6b4c3d54b5a999c6387c57cddd3 [2021-10-16 02:05:13,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:05:13,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:05:13,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:05:13,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:05:13,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:05:13,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:05:13" (1/1) ... [2021-10-16 02:05:13,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be0bbab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:13, skipping insertion in model container [2021-10-16 02:05:13,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:05:13" (1/1) ... [2021-10-16 02:05:13,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:05:13,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:05:13,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:05:13,722 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) [2021-10-16 02:05:13,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48e349fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:13, skipping insertion in model container [2021-10-16 02:05:13,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:05:13,723 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:05:13,726 INFO L168 Benchmark]: Toolchain (without parser) took 594.16 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 56.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:13,726 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 75.5 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:05:13,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.84 ms. Allocated memory is still 92.3 MB. Free memory was 70.1 MB in the beginning and 56.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:13,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 75.5 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 591.84 ms. Allocated memory is still 92.3 MB. Free memory was 70.1 MB in the beginning and 56.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:05:15,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:05:15,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:05:16,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:05:16,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:05:16,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:05:16,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:05:16,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:05:16,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:05:16,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:05:16,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:05:16,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:05:16,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:05:16,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:05:16,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:05:16,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:05:16,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:05:16,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:05:16,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:05:16,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:05:16,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:05:16,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:05:16,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:05:16,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:05:16,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:05:16,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:05:16,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:05:16,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:05:16,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:05:16,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:05:16,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:05:16,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:05:16,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:05:16,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:05:16,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:05:16,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:05:16,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:05:16,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:05:16,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:05:16,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:05:16,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:05:16,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:05:16,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:05:16,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:05:16,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:05:16,115 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:05:16,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:05:16,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:05:16,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:05:16,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:05:16,116 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:05:16,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:05:16,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:05:16,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:05:16,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:05:16,118 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:05:16,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:05:16,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:05:16,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:05:16,118 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:05:16,119 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:05:16,119 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:05:16,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:05:16,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:05:16,119 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:05:16,120 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:05:16,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:05:16,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:05:16,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:05:16,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:05:16,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:05:16,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:05:16,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:05:16,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:05:16,121 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:05:16,122 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:05:16,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:05:16,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:05:16,122 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_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9988836ddee06b99001d03a87a3e72125eac1288 [2021-10-16 02:05:16,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:05:16,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:05:16,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:05:16,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:05:16,484 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:05:16,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i [2021-10-16 02:05:16,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/cfd3e84a7/4b3966a3ee5944eeafb2fc859c327cbb/FLAG6ec847174 [2021-10-16 02:05:17,211 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:05:17,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/sv-benchmarks/c/ldv-memsafety/memleaks_test6_3.i [2021-10-16 02:05:17,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/cfd3e84a7/4b3966a3ee5944eeafb2fc859c327cbb/FLAG6ec847174 [2021-10-16 02:05:17,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/data/cfd3e84a7/4b3966a3ee5944eeafb2fc859c327cbb [2021-10-16 02:05:17,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:05:17,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:05:17,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:05:17,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:05:17,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:05:17,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:05:17" (1/1) ... [2021-10-16 02:05:17,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae93a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:17, skipping insertion in model container [2021-10-16 02:05:17,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:05:17" (1/1) ... [2021-10-16 02:05:17,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:05:17,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:05:17,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:05:18,022 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:05:18,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:05:18,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:05:18,116 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:05:18,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:05:18,222 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:05:18,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18 WrapperNode [2021-10-16 02:05:18,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:05:18,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:05:18,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:05:18,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:05:18,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:05:18,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:05:18,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:05:18,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:05:18,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:05:18,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:05:18,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:05:18,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:05:18,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (1/1) ... [2021-10-16 02:05:18,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:05:18,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:05:18,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:05:18,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:05:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:05:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:05:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:05:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:05:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:05:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:05:18,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:05:18,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:05:18,758 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-16 02:05:18,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:05:18 BoogieIcfgContainer [2021-10-16 02:05:18,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:05:18,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:05:18,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:05:18,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:05:18,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:05:17" (1/3) ... [2021-10-16 02:05:18,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129058eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:05:18, skipping insertion in model container [2021-10-16 02:05:18,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:05:18" (2/3) ... [2021-10-16 02:05:18,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129058eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:05:18, skipping insertion in model container [2021-10-16 02:05:18,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:05:18" (3/3) ... [2021-10-16 02:05:18,769 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test6_3.i [2021-10-16 02:05:18,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:05:18,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-16 02:05:18,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:05:18,826 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:05:18,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-16 02:05:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:05:18,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:18,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:18,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 119408650, now seen corresponding path program 1 times [2021-10-16 02:05:18,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:18,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814011991] [2021-10-16 02:05:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:18,868 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:18,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:05:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:05:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:19,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:19,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814011991] [2021-10-16 02:05:19,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814011991] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:19,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:19,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:05:19,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496154033] [2021-10-16 02:05:19,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:19,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:19,159 INFO L87 Difference]: Start difference. First operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:19,227 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-16 02:05:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:05:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:05:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:19,257 INFO L225 Difference]: With dead ends: 53 [2021-10-16 02:05:19,258 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:05:19,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:05:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:05:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2021-10-16 02:05:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-16 02:05:19,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2021-10-16 02:05:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:19,291 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-16 02:05:19,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-16 02:05:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:05:19,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:19,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:19,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:19,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 119443416, now seen corresponding path program 1 times [2021-10-16 02:05:19,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:19,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725431711] [2021-10-16 02:05:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:19,507 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:19,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:19,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:05:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:05:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:19,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:19,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:19,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725431711] [2021-10-16 02:05:19,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725431711] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:19,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:19,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:05:19,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56388440] [2021-10-16 02:05:19,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:19,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:19,668 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:19,693 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-16 02:05:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:05:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:19,695 INFO L225 Difference]: With dead ends: 27 [2021-10-16 02:05:19,696 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 02:05:19,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:05:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 02:05:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-16 02:05:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-16 02:05:19,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-10-16 02:05:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-16 02:05:19,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-16 02:05:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:05:19,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:19,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:19,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 02:05:19,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:19,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash 176666952, now seen corresponding path program 1 times [2021-10-16 02:05:19,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:19,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165587697] [2021-10-16 02:05:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:19,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:19,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:05:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:20,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:05:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:20,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:20,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165587697] [2021-10-16 02:05:20,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165587697] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:20,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:05:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178462750] [2021-10-16 02:05:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:05:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:05:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:05:20,115 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:20,208 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-16 02:05:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:05:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:05:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:20,213 INFO L225 Difference]: With dead ends: 46 [2021-10-16 02:05:20,213 INFO L226 Difference]: Without dead ends: 46 [2021-10-16 02:05:20,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:05:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-16 02:05:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-10-16 02:05:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-16 02:05:20,221 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-10-16 02:05:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:20,221 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-16 02:05:20,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-16 02:05:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:05:20,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:20,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:20,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:20,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:20,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash 176667045, now seen corresponding path program 1 times [2021-10-16 02:05:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:20,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983275396] [2021-10-16 02:05:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:20,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:20,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:20,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:05:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:05:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:20,582 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-16 02:05:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-16 02:05:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:20,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:20,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:20,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983275396] [2021-10-16 02:05:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983275396] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:20,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:20,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-16 02:05:20,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851969265] [2021-10-16 02:05:20,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:05:20,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:05:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:05:20,779 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:20,821 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-10-16 02:05:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:05:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:05:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:20,822 INFO L225 Difference]: With dead ends: 33 [2021-10-16 02:05:20,822 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:05:20,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:05:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:05:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-16 02:05:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.48) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-16 02:05:20,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-10-16 02:05:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:20,828 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-16 02:05:20,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-16 02:05:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:05:20,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:20,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:20,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:21,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:21,040 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 176667046, now seen corresponding path program 1 times [2021-10-16 02:05:21,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:21,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317528170] [2021-10-16 02:05:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:21,042 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:21,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:21,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:21,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:05:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:05:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:21,144 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:05:21,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:05:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:21,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:21,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:21,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317528170] [2021-10-16 02:05:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317528170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:21,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-16 02:05:21,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705032969] [2021-10-16 02:05:21,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:21,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:21,464 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:21,545 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-10-16 02:05:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:21,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:05:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:21,547 INFO L225 Difference]: With dead ends: 54 [2021-10-16 02:05:21,547 INFO L226 Difference]: Without dead ends: 54 [2021-10-16 02:05:21,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-16 02:05:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-10-16 02:05:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.5) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-10-16 02:05:21,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 8 [2021-10-16 02:05:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-10-16 02:05:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-10-16 02:05:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:05:21,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:21,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:21,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:21,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:21,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash -592221333, now seen corresponding path program 1 times [2021-10-16 02:05:21,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:21,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644312238] [2021-10-16 02:05:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:21,773 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:21,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:21,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:05:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:05:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:22,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:22,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:22,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644312238] [2021-10-16 02:05:22,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644312238] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:22,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:22,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 02:05:22,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134572660] [2021-10-16 02:05:22,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:05:22,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:05:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:05:22,072 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:22,206 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-16 02:05:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:05:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:05:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:22,210 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:05:22,210 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:05:22,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:05:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:05:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-10-16 02:05:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.45) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-10-16 02:05:22,215 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 9 [2021-10-16 02:05:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:22,216 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-10-16 02:05:22,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-10-16 02:05:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:05:22,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:22,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:22,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:22,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1181711122, now seen corresponding path program 1 times [2021-10-16 02:05:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:22,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473298329] [2021-10-16 02:05:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:22,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:22,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:22,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:22,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:05:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:05:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:22,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:22,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:22,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473298329] [2021-10-16 02:05:22,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473298329] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:22,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:22,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:05:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2156876] [2021-10-16 02:05:22,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:05:22,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:05:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:05:22,578 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:22,625 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-10-16 02:05:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:05:22,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:05:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:22,626 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:05:22,627 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:05:22,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:05:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:05:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-10-16 02:05:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-10-16 02:05:22,631 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 9 [2021-10-16 02:05:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:22,631 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-10-16 02:05:22,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-10-16 02:05:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:05:22,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:22,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:22,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:22,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:22,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1178992070, now seen corresponding path program 1 times [2021-10-16 02:05:22,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:22,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381566604] [2021-10-16 02:05:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:22,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:22,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:22,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:05:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:05:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:22,958 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 [2021-10-16 02:05:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:22,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:23,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:23,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381566604] [2021-10-16 02:05:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381566604] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:23,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:23,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:05:23,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568041203] [2021-10-16 02:05:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:23,037 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:23,116 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-10-16 02:05:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:05:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:23,117 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:05:23,117 INFO L226 Difference]: Without dead ends: 45 [2021-10-16 02:05:23,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:05:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-16 02:05:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-16 02:05:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-10-16 02:05:23,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 10 [2021-10-16 02:05:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:23,122 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-10-16 02:05:23,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-10-16 02:05:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:05:23,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:23,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:23,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:23,336 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1178944307, now seen corresponding path program 1 times [2021-10-16 02:05:23,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:23,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487357486] [2021-10-16 02:05:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:23,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:23,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:23,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:05:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:05:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:23,472 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-16 02:05:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-16 02:05:23,559 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:05:23,559 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 20 [2021-10-16 02:05:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:23,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:23,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:23,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487357486] [2021-10-16 02:05:23,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487357486] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:23,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:23,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:05:23,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579425314] [2021-10-16 02:05:23,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:23,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:23,680 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:23,745 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-16 02:05:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:05:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:23,747 INFO L225 Difference]: With dead ends: 42 [2021-10-16 02:05:23,747 INFO L226 Difference]: Without dead ends: 42 [2021-10-16 02:05:23,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:05:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-16 02:05:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-10-16 02:05:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-10-16 02:05:23,751 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 10 [2021-10-16 02:05:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:23,751 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-10-16 02:05:23,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-10-16 02:05:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:05:23,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:23,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:23,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:23,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:23,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1178944306, now seen corresponding path program 1 times [2021-10-16 02:05:23,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:23,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205943840] [2021-10-16 02:05:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:23,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:23,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:23,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:05:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:05:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:24,087 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:05:24,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:05:24,162 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:05:24,162 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 12 treesize of output 14 [2021-10-16 02:05:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:24,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:24,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:24,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205943840] [2021-10-16 02:05:24,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205943840] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:24,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:24,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 02:05:24,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280666722] [2021-10-16 02:05:24,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:05:24,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:05:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:05:24,598 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:24,667 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-10-16 02:05:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:24,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:05:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:24,668 INFO L225 Difference]: With dead ends: 37 [2021-10-16 02:05:24,668 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:05:24,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:05:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:05:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-10-16 02:05:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-16 02:05:24,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-10-16 02:05:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:24,672 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-16 02:05:24,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-16 02:05:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:05:24,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:24,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:24,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:24,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:24,874 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1988338696, now seen corresponding path program 1 times [2021-10-16 02:05:24,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:24,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556081936] [2021-10-16 02:05:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:24,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:24,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:24,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:24,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:05:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:05:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:25,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:25,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556081936] [2021-10-16 02:05:25,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556081936] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:25,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:25,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:05:25,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492231943] [2021-10-16 02:05:25,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:05:25,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:05:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:05:25,079 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:25,128 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-16 02:05:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:05:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:05:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:25,130 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:05:25,130 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:05:25,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:05:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:05:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-16 02:05:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-16 02:05:25,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2021-10-16 02:05:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:25,142 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-16 02:05:25,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-16 02:05:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:05:25,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:25,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:25,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:25,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:25,350 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 889860017, now seen corresponding path program 1 times [2021-10-16 02:05:25,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:25,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631491014] [2021-10-16 02:05:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:25,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:25,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:25,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:25,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:05:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:05:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:25,505 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-16 02:05:25,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-16 02:05:25,591 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:05:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-10-16 02:05:25,761 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-16 02:05:25,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 30 [2021-10-16 02:05:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:25,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:29,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:29,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631491014] [2021-10-16 02:05:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631491014] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:29,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:29,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-10-16 02:05:29,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020691663] [2021-10-16 02:05:29,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:05:29,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:29,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:05:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=34, Unknown=2, NotChecked=0, Total=56 [2021-10-16 02:05:29,998 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:40,149 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-16 02:05:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:05:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:05:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:40,150 INFO L225 Difference]: With dead ends: 24 [2021-10-16 02:05:40,150 INFO L226 Difference]: Without dead ends: 24 [2021-10-16 02:05:40,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8168.6ms TimeCoverageRelationStatistics Valid=33, Invalid=55, Unknown=2, NotChecked=0, Total=90 [2021-10-16 02:05:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-16 02:05:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-10-16 02:05:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-16 02:05:40,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2021-10-16 02:05:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:40,152 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-16 02:05:40,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-16 02:05:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:05:40,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:40,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:40,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:40,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:40,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:40,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1815856774, now seen corresponding path program 1 times [2021-10-16 02:05:40,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:40,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717745828] [2021-10-16 02:05:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:40,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:40,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:40,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:05:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:05:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:40,550 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-16 02:05:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-16 02:05:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:05:47,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:47,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717745828] [2021-10-16 02:05:47,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717745828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:05:47,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:05:47,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-10-16 02:05:47,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190775627] [2021-10-16 02:05:47,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:05:47,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:05:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:05:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=77, Unknown=2, NotChecked=0, Total=110 [2021-10-16 02:05:47,243 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:49,479 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-16 02:05:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:05:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:05:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:49,480 INFO L225 Difference]: With dead ends: 23 [2021-10-16 02:05:49,480 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:05:49,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 5076.1ms TimeCoverageRelationStatistics Valid=47, Invalid=107, Unknown=2, NotChecked=0, Total=156 [2021-10-16 02:05:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:05:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:05:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-16 02:05:49,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-10-16 02:05:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:49,482 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-16 02:05:49,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-16 02:05:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:05:49,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:49,483 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:49,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:49,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-16 02:05:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2005770588, now seen corresponding path program 1 times [2021-10-16 02:05:49,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:49,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924397595] [2021-10-16 02:05:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:49,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:49,685 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:49,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:05:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:05:49,839 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:05:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:05:49,912 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:05:49,912 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:05:49,913 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:05:49,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:05:49,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:05:49,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:05:49,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:05:49,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:05:49,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:05:49,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:05:49,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:05:50,123 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:05:50,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:05:50 BoogieIcfgContainer [2021-10-16 02:05:50,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:05:50,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:05:50,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:05:50,166 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:05:50,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:05:18" (3/4) ... [2021-10-16 02:05:50,169 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:05:50,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:05:50,170 INFO L168 Benchmark]: Toolchain (without parser) took 32698.37 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 53.9 MB in the beginning and 67.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,171 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:05:50,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.83 ms. Allocated memory is still 77.6 MB. Free memory was 53.8 MB in the beginning and 41.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.56 ms. Allocated memory is still 77.6 MB. Free memory was 41.1 MB in the beginning and 38.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,172 INFO L168 Benchmark]: Boogie Preprocessor took 29.98 ms. Allocated memory is still 77.6 MB. Free memory was 38.9 MB in the beginning and 37.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,172 INFO L168 Benchmark]: RCFGBuilder took 451.67 ms. Allocated memory is still 77.6 MB. Free memory was 37.4 MB in the beginning and 51.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,173 INFO L168 Benchmark]: TraceAbstraction took 31402.85 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 50.7 MB in the beginning and 68.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:05:50,173 INFO L168 Benchmark]: Witness Printer took 4.03 ms. Allocated memory is still 113.2 MB. Free memory was 68.3 MB in the beginning and 67.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:05:50,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 749.83 ms. Allocated memory is still 77.6 MB. Free memory was 53.8 MB in the beginning and 41.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.56 ms. Allocated memory is still 77.6 MB. Free memory was 41.1 MB in the beginning and 38.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.98 ms. Allocated memory is still 77.6 MB. Free memory was 38.9 MB in the beginning and 37.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 451.67 ms. Allocated memory is still 77.6 MB. Free memory was 37.4 MB in the beginning and 51.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31402.85 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 50.7 MB in the beginning and 68.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.03 ms. Allocated memory is still 113.2 MB. Free memory was 68.3 MB in the beginning and 67.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 790]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 790. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L782] struct A a6; VAL [a6={3:0}, ldv_global_msg_list={-2147483648:0}] [L764] int ret = - -3; [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L765] int *p = (int *)ldv_malloc(sizeof(int)); [L766] COND FALSE !(p==0) [L758] return __VERIFIER_nondet_int(); [L768] ret = f6() [L769] COND FALSE !(ret<0) [L761] return __VERIFIER_nondet_int(); [L771] ret = g6() [L772] COND FALSE !(ret<0) VAL [a6={3:0}, ldv_global_msg_list={-2147483648:0}] [L774] a->p = p VAL [a6={3:0}, ldv_global_msg_list={-2147483648:0}] [L775] return 0; VAL [a6={3:0}, ldv_global_msg_list={-2147483648:0}] [L784] int ret = probe1_6(&a6); [L785] COND TRUE ret==0 [L788] a6.p = 0 VAL [a6={3:0}, ldv_global_msg_list={-2147483648:0}] - UnprovableResult [Line: 774]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 774]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 777]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: 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 1 procedures, 28 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 31302.9ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 18.3ms, AutomataDifference: 13232.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 318 SDtfs, 636 SDslu, 340 SDs, 0 SdLazy, 274 SolverSat, 29 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8635.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 13866.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 69 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 118.2ms SsaConstructionTime, 324.5ms SatisfiabilityAnalysisTime, 13484.4ms InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 224 ConstructedInterpolants, 19 QuantifiedInterpolants, 1975 SizeOfPredicates, 29 NumberOfNonLiveVariables, 596 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 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 could not prove your program: unable to determine feasibility of some traces [2021-10-16 02:05:50,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be10f78a-7cda-487e-855f-c0530c50bfbb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...