./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:40:29,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:40:29,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:40:29,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:40:29,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:40:29,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:40:29,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:40:29,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:40:29,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:40:29,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:40:29,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:40:29,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:40:29,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:40:29,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:40:29,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:40:29,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:40:29,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:40:29,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:40:29,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:40:29,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:40:29,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:40:29,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:40:29,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:40:29,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:40:29,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:40:29,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:40:29,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:40:29,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:40:29,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:40:29,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:40:29,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:40:29,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:40:29,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:40:29,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:40:29,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:40:29,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:40:29,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:40:29,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:40:29,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:40:29,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:40:29,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:40:29,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-10-17 17:40:29,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:40:29,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:40:29,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:40:29,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:40:29,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:40:29,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:40:29,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:40:29,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:40:29,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:40:29,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:40:29,598 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:40:29,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:40:29,598 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:40:29,599 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:40:29,599 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:40:29,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:40:29,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:40:29,599 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:40:29,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:40:29,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:40:29,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:40:29,601 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:40:29,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:40:29,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:40:29,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:40:29,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:40:29,602 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:40:29,602 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:40:29,602 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:40:29,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:40:29,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:40:29,603 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:40:29,603 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:40:29,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:40:29,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:40:29,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:40:29,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:40:29,604 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:40:29,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:40:29,604 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:40:29,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:40:29,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:40:29,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2022-10-17 17:40:29,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:40:29,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:40:29,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:40:29,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:40:29,896 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:40:29,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2022-10-17 17:40:29,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/6b2821358/4c2903713f054fe5a5ad345b9cc7933d/FLAGe51e68543 [2022-10-17 17:40:30,541 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:40:30,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2022-10-17 17:40:30,559 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/6b2821358/4c2903713f054fe5a5ad345b9cc7933d/FLAGe51e68543 [2022-10-17 17:40:30,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/6b2821358/4c2903713f054fe5a5ad345b9cc7933d [2022-10-17 17:40:30,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:40:30,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:40:30,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:30,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:40:30,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:40:30,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:30" (1/1) ... [2022-10-17 17:40:30,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40265b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:30, skipping insertion in model container [2022-10-17 17:40:30,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:30" (1/1) ... [2022-10-17 17:40:30,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:40:30,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:40:31,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:31,392 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-10-17 17:40:31,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@127f242f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:31, skipping insertion in model container [2022-10-17 17:40:31,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:31,393 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-10-17 17:40:31,395 INFO L158 Benchmark]: Toolchain (without parser) took 564.68ms. Allocated memory is still 88.1MB. Free memory was 56.3MB in the beginning and 42.6MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 17:40:31,396 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 67.0MB in the beginning and 66.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:40:31,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.18ms. Allocated memory is still 88.1MB. Free memory was 56.2MB in the beginning and 42.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 17:40:31,398 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 67.0MB in the beginning and 66.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.18ms. Allocated memory is still 88.1MB. Free memory was 56.2MB in the beginning and 42.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:40:33,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:40:33,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:40:33,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:40:33,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:40:33,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:40:33,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:40:33,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:40:33,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:40:33,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:40:33,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:40:33,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:40:33,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:40:33,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:40:33,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:40:33,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:40:33,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:40:33,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:40:33,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:40:33,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:40:33,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:40:33,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:40:33,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:40:33,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:40:33,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:40:33,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:40:33,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:40:33,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:40:33,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:40:33,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:40:33,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:40:33,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:40:33,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:40:33,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:40:33,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:40:33,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:40:33,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:40:33,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:40:33,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:40:33,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:40:33,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:40:33,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-10-17 17:40:33,920 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:40:33,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:40:33,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:40:33,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:40:33,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:40:33,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:40:33,924 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:40:33,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:40:33,925 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:40:33,925 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:40:33,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:40:33,926 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:40:33,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:40:33,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:40:33,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:40:33,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:40:33,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:40:33,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:40:33,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:40:33,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:40:33,930 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:40:33,931 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:40:33,931 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:40:33,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:40:33,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:40:33,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:40:33,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:40:33,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:40:33,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:40:33,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:40:33,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:40:33,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:40:33,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:40:33,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:40:33,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:40:33,934 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:40:33,934 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:33,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:40:33,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:40:33,935 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_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2022-10-17 17:40:34,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:40:34,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:40:34,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:40:34,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:40:34,324 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:40:34,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2022-10-17 17:40:34,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/4307c0016/8b94f70427d74836a682eb1e8d9f1f06/FLAG2372534a4 [2022-10-17 17:40:35,170 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:40:35,170 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2022-10-17 17:40:35,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/4307c0016/8b94f70427d74836a682eb1e8d9f1f06/FLAG2372534a4 [2022-10-17 17:40:35,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/data/4307c0016/8b94f70427d74836a682eb1e8d9f1f06 [2022-10-17 17:40:35,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:40:35,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:40:35,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:35,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:40:35,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:40:35,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:35" (1/1) ... [2022-10-17 17:40:35,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8ca7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:35, skipping insertion in model container [2022-10-17 17:40:35,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:35" (1/1) ... [2022-10-17 17:40:35,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:40:35,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:40:35,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:35,937 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-10-17 17:40:35,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:40:36,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:36,021 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:40:36,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:36,176 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:40:36,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36 WrapperNode [2022-10-17 17:40:36,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:36,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:40:36,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:40:36,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:40:36,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,253 INFO L138 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 86 [2022-10-17 17:40:36,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:40:36,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:40:36,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:40:36,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:40:36,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:40:36,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:40:36,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:40:36,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:40:36,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (1/1) ... [2022-10-17 17:40:36,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:40:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:36,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:40:36,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:40:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:40:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:40:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:40:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:40:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:40:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:40:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:40:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:40:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:40:36,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:40:36,533 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:40:36,535 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:40:37,008 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:40:37,015 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:40:37,015 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:40:37,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:40:37 BoogieIcfgContainer [2022-10-17 17:40:37,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:40:37,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:40:37,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:40:37,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:40:37,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:40:35" (1/3) ... [2022-10-17 17:40:37,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b6ed81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:40:37, skipping insertion in model container [2022-10-17 17:40:37,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:36" (2/3) ... [2022-10-17 17:40:37,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b6ed81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:40:37, skipping insertion in model container [2022-10-17 17:40:37,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:40:37" (3/3) ... [2022-10-17 17:40:37,038 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-1.i [2022-10-17 17:40:37,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:40:37,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-10-17 17:40:37,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:40:37,142 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1de1d1cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:40:37,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-10-17 17:40:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:40:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:40:37,155 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:37,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:37,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:37,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627285, now seen corresponding path program 1 times [2022-10-17 17:40:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:37,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553318234] [2022-10-17 17:40:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:37,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:40:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:40:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:37,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:37,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:37,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553318234] [2022-10-17 17:40:37,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553318234] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:37,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:37,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:40:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841442895] [2022-10-17 17:40:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:37,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:40:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:37,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:40:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:37,389 INFO L87 Difference]: Start difference. First operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:37,533 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2022-10-17 17:40:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:40:37,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:40:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:37,545 INFO L225 Difference]: With dead ends: 114 [2022-10-17 17:40:37,546 INFO L226 Difference]: Without dead ends: 110 [2022-10-17 17:40:37,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:37,551 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 55 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:37,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 231 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-17 17:40:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 62. [2022-10-17 17:40:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.6) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:40:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-10-17 17:40:37,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2022-10-17 17:40:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:37,617 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-10-17 17:40:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-10-17 17:40:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:40:37,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:37,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:37,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:40:37,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628211, now seen corresponding path program 1 times [2022-10-17 17:40:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:37,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045753979] [2022-10-17 17:40:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:37,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:37,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:40:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:40:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:37,969 INFO L390 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 7 [2022-10-17 17:40:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:38,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:38,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045753979] [2022-10-17 17:40:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045753979] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:38,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:40:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426182260] [2022-10-17 17:40:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:40:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:40:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:38,043 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:38,313 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2022-10-17 17:40:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:40:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:40:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:38,316 INFO L225 Difference]: With dead ends: 97 [2022-10-17 17:40:38,316 INFO L226 Difference]: Without dead ends: 97 [2022-10-17 17:40:38,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:38,318 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:38,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 158 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:40:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-17 17:40:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2022-10-17 17:40:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:40:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-10-17 17:40:38,337 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 11 [2022-10-17 17:40:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:38,337 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-10-17 17:40:38,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-10-17 17:40:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:40:38,341 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:38,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:38,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-10-17 17:40:38,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:40:38,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628210, now seen corresponding path program 1 times [2022-10-17 17:40:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058896508] [2022-10-17 17:40:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:38,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:38,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:38,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:40:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:40:38,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:38,678 INFO L390 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 [2022-10-17 17:40:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:38,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:38,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058896508] [2022-10-17 17:40:38,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058896508] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:38,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:38,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:40:38,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491003727] [2022-10-17 17:40:38,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:38,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:40:38,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:40:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:40:38,810 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:39,308 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-10-17 17:40:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:40:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:40:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:39,310 INFO L225 Difference]: With dead ends: 127 [2022-10-17 17:40:39,310 INFO L226 Difference]: Without dead ends: 127 [2022-10-17 17:40:39,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:40:39,312 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 109 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:39,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 368 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:40:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-10-17 17:40:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2022-10-17 17:40:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.5783132530120483) internal successors, (131), 100 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:40:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-10-17 17:40:39,332 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 11 [2022-10-17 17:40:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:39,335 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-10-17 17:40:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-10-17 17:40:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:40:39,336 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:39,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:39,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:40:39,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -851123604, now seen corresponding path program 1 times [2022-10-17 17:40:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687835116] [2022-10-17 17:40:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:39,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:39,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:39,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:39,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 17:40:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:40:39,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:39,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:39,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:39,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687835116] [2022-10-17 17:40:39,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687835116] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:39,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:39,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:40:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942129988] [2022-10-17 17:40:39,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:40:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:40:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:40:39,639 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:39,799 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2022-10-17 17:40:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:40:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:40:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:39,801 INFO L225 Difference]: With dead ends: 148 [2022-10-17 17:40:39,801 INFO L226 Difference]: Without dead ends: 146 [2022-10-17 17:40:39,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:40:39,803 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:39,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 162 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:40:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-10-17 17:40:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2022-10-17 17:40:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.5662650602409638) internal successors, (130), 100 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:40:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2022-10-17 17:40:39,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 11 [2022-10-17 17:40:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:39,815 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2022-10-17 17:40:39,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2022-10-17 17:40:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:40:39,816 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:39,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:40,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:40:40,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -851124530, now seen corresponding path program 1 times [2022-10-17 17:40:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:40,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612145997] [2022-10-17 17:40:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:40,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:40,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:40,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 17:40:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:40:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:40,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:40,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:40,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612145997] [2022-10-17 17:40:40,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612145997] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:40,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:40,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:40:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536837523] [2022-10-17 17:40:40,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:40,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:40:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:40:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:40,149 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:40,197 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2022-10-17 17:40:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:40:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:40:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:40,199 INFO L225 Difference]: With dead ends: 89 [2022-10-17 17:40:40,199 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 17:40:40,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:40,201 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:40,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:40:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 17:40:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-10-17 17:40:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 83 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:40:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-10-17 17:40:40,208 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 11 [2022-10-17 17:40:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:40,208 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-10-17 17:40:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-10-17 17:40:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:40:40,209 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:40,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:40,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:40,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:40:40,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1832553715, now seen corresponding path program 1 times [2022-10-17 17:40:40,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026812845] [2022-10-17 17:40:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:40,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:40,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 17:40:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:40:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:40,528 INFO L390 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 [2022-10-17 17:40:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:41,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:41,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026812845] [2022-10-17 17:40:41,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026812845] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546758330] [2022-10-17 17:40:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:40:41,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:40:41,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-10-17 17:40:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:40:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:41,884 INFO L390 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 [2022-10-17 17:40:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:41,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:42,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546758330] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54000407] [2022-10-17 17:40:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:42,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:42,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:40:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:40:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:42,525 INFO L390 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 [2022-10-17 17:40:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:42,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:43,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54000407] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:43,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:40:43,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-10-17 17:40:43,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569865544] [2022-10-17 17:40:43,018 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:43,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:40:43,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:43,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:40:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:40:43,020 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:40:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:44,278 INFO L93 Difference]: Finished difference Result 204 states and 233 transitions. [2022-10-17 17:40:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:40:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-10-17 17:40:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:44,282 INFO L225 Difference]: With dead ends: 204 [2022-10-17 17:40:44,282 INFO L226 Difference]: Without dead ends: 204 [2022-10-17 17:40:44,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:40:44,283 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 429 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:44,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 440 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 121 Unchecked, 0.9s Time] [2022-10-17 17:40:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-10-17 17:40:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 96. [2022-10-17 17:40:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 92 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:40:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-10-17 17:40:44,292 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 14 [2022-10-17 17:40:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:44,293 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-10-17 17:40:44,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:40:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-10-17 17:40:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:40:44,294 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:44,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:44,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:44,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:44,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-17 17:40:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:44,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -68910454, now seen corresponding path program 1 times [2022-10-17 17:40:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:44,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298334231] [2022-10-17 17:40:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:44,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:44,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:44,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:44,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-10-17 17:40:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:40:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:45,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:45,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298334231] [2022-10-17 17:40:45,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298334231] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880294580] [2022-10-17 17:40:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:40:45,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:40:45,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-10-17 17:40:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:40:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:45,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [880294580] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765060343] [2022-10-17 17:40:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:45,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:45,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 17:40:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:40:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:45,498 INFO L390 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 7 [2022-10-17 17:40:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:40:45,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:45,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765060343] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:45,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-10-17 17:40:45,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6] total 14 [2022-10-17 17:40:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481414832] [2022-10-17 17:40:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:45,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:40:45,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:40:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:40:45,607 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:45,871 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2022-10-17 17:40:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:40:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-10-17 17:40:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:45,873 INFO L225 Difference]: With dead ends: 138 [2022-10-17 17:40:45,873 INFO L226 Difference]: Without dead ends: 138 [2022-10-17 17:40:45,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:40:45,874 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:45,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 196 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:40:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-10-17 17:40:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 100. [2022-10-17 17:40:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 96 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:40:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-10-17 17:40:45,882 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 21 [2022-10-17 17:40:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:45,883 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-10-17 17:40:45,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-10-17 17:40:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:40:45,884 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:45,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:45,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:46,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:46,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:46,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash -68910453, now seen corresponding path program 1 times [2022-10-17 17:40:46,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409368925] [2022-10-17 17:40:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:46,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:46,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:46,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-10-17 17:40:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:40:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:46,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:46,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409368925] [2022-10-17 17:40:46,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409368925] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789078046] [2022-10-17 17:40:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:46,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:40:46,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:40:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-10-17 17:40:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:40:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:46,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [789078046] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799507011] [2022-10-17 17:40:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:47,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:47,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:47,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 17:40:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:40:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:40:47,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:47,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799507011] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:47,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-10-17 17:40:47,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6] total 12 [2022-10-17 17:40:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504937359] [2022-10-17 17:40:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:47,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:40:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:40:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:40:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:40:47,143 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:47,225 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2022-10-17 17:40:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:40:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-10-17 17:40:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:47,227 INFO L225 Difference]: With dead ends: 123 [2022-10-17 17:40:47,228 INFO L226 Difference]: Without dead ends: 123 [2022-10-17 17:40:47,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:40:47,229 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 56 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:47,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 165 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-10-17 17:40:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2022-10-17 17:40:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.4864864864864864) internal successors, (110), 91 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-17 17:40:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-10-17 17:40:47,245 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 21 [2022-10-17 17:40:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:47,246 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-10-17 17:40:47,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:40:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-10-17 17:40:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:40:47,249 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:47,249 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:47,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:47,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:47,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:47,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-17 17:40:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1435873458, now seen corresponding path program 2 times [2022-10-17 17:40:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:40:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56238919] [2022-10-17 17:40:47,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:40:47,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:40:47,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:40:47,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:40:47,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-10-17 17:40:47,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:40:47,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:40:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:48,009 INFO L390 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 [2022-10-17 17:40:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:50,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:40:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56238919] [2022-10-17 17:40:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56238919] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318010277] [2022-10-17 17:40:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:40:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:40:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:40:50,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:40:50,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-10-17 17:40:50,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:40:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 17:40:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:51,005 INFO L390 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 [2022-10-17 17:40:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:51,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318010277] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957683230] [2022-10-17 17:40:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:40:57,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:57,678 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:57,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a6d2aaa-12d7-4c9c-bd89-52b163695b84/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-17 17:40:57,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:40:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:40:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:57,783 INFO L390 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 [2022-10-17 17:40:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:57,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:41:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:02,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957683230] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:41:02,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:41:02,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 12] total 46 [2022-10-17 17:41:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252468971] [2022-10-17 17:41:02,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:41:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-10-17 17:41:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:41:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-10-17 17:41:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1822, Unknown=2, NotChecked=0, Total=2162 [2022-10-17 17:41:02,722 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 47 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5)