./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/20020406-1.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_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/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_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/20020406-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/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_843c14d0-6cc1-4b22-9034-96b96b35e48e/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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- 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 17:37:53,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:53,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:53,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:53,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:53,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:53,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:53,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:53,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:53,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:53,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:53,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:53,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:53,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:53,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:53,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:53,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:53,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:53,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:53,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:53,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:53,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:53,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:53,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:53,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:53,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:53,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:53,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:53,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:53,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:53,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:53,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:53,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:53,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:53,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:53,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:53,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:53,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:53,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:53,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:53,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:53,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-10-17 17:37:53,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:53,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:53,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:53,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:53,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:53,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:53,661 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:53,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:53,662 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:53,662 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:53,663 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:53,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:53,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:53,664 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:53,664 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:53,664 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:53,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:53,665 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:53,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:37:53,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:37:53,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:53,667 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:53,667 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:37:53,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:53,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:53,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:53,669 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:37:53,669 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:37:53,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:37:53,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:53,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:37:53,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:53,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:53,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:53,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:53,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:53,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:53,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:53,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:53,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:53,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:53,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:53,674 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_843c14d0-6cc1-4b22-9034-96b96b35e48e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-10-17 17:37:54,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:54,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:54,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:54,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:54,036 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:54,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/memsafety/20020406-1.i [2022-10-17 17:37:54,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/4d194bc5b/1ee0de4a59e345dcb67fb4bf01782a99/FLAGb086e93d5 [2022-10-17 17:37:54,804 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:54,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/sv-benchmarks/c/memsafety/20020406-1.i [2022-10-17 17:37:54,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/4d194bc5b/1ee0de4a59e345dcb67fb4bf01782a99/FLAGb086e93d5 [2022-10-17 17:37:55,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/4d194bc5b/1ee0de4a59e345dcb67fb4bf01782a99 [2022-10-17 17:37:55,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:55,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:55,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:55,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:55,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:55,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:55" (1/1) ... [2022-10-17 17:37:55,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676e6e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:55, skipping insertion in model container [2022-10-17 17:37:55,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:55" (1/1) ... [2022-10-17 17:37:55,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:55,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:55,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:55,882 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 17:37:55,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c98d4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:55, skipping insertion in model container [2022-10-17 17:37:55,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:55,884 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-10-17 17:37:55,887 INFO L158 Benchmark]: Toolchain (without parser) took 843.34ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 42.1MB in the beginning and 71.2MB in the end (delta: -29.1MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-10-17 17:37:55,888 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:37:55,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 840.56ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 41.9MB in the beginning and 71.2MB in the end (delta: -29.3MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-10-17 17:37:55,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 840.56ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 41.9MB in the beginning and 71.2MB in the end (delta: -29.3MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 897]: 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_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/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_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/20020406-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/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_843c14d0-6cc1-4b22-9034-96b96b35e48e/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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- 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 17:37:58,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:58,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:58,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:58,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:58,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:58,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:58,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:58,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:58,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:58,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:58,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:58,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:58,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:58,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:58,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:58,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:58,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:58,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:58,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:58,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:58,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:58,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:58,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:58,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:58,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:58,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:58,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:58,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:58,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:58,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:58,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:58,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:58,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:58,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:58,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:58,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:58,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:58,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:58,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:58,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:58,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-10-17 17:37:58,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:58,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:58,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:58,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:58,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:58,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:58,868 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:58,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:58,868 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:58,869 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:58,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:58,869 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:58,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:37:58,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:37:58,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:58,871 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:58,872 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:37:58,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:58,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:58,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:58,873 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:37:58,873 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:37:58,877 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:37:58,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:58,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:37:58,878 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:37:58,879 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:37:58,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:58,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:58,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:58,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:37:58,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:58,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:58,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:58,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:58,883 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:37:58,884 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:58,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:58,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:37:58,885 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_843c14d0-6cc1-4b22-9034-96b96b35e48e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-10-17 17:37:59,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:59,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:59,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:59,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:59,528 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:59,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/memsafety/20020406-1.i [2022-10-17 17:37:59,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/b700256b6/218364da53fb4163b96d78534623fc14/FLAG80474b162 [2022-10-17 17:38:00,445 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:00,446 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/sv-benchmarks/c/memsafety/20020406-1.i [2022-10-17 17:38:00,466 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/b700256b6/218364da53fb4163b96d78534623fc14/FLAG80474b162 [2022-10-17 17:38:00,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/data/b700256b6/218364da53fb4163b96d78534623fc14 [2022-10-17 17:38:00,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:00,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:00,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:00,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:00,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:00,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39411bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00, skipping insertion in model container [2022-10-17 17:38:00,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:00,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:01,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:01,455 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-10-17 17:38:01,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:01,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:01,560 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:01,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:01,823 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:01,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01 WrapperNode [2022-10-17 17:38:01,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:01,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:01,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:01,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:01,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:01,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:01,949 INFO L138 Inliner]: procedures = 286, calls = 76, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-10-17 17:38:01,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:01,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:01,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:01,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:01,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:01,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:01,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:01,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:02,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:02,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:02,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:02,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (1/1) ... [2022-10-17 17:38:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:02,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:02,180 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2022-10-17 17:38:02,182 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2022-10-17 17:38:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-10-17 17:38:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:38:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFnew [2022-10-17 17:38:02,184 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2022-10-17 17:38:02,184 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFfree [2022-10-17 17:38:02,184 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2022-10-17 17:38:02,184 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2022-10-17 17:38:02,184 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2022-10-17 17:38:02,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:02,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-10-17 17:38:02,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:38:02,185 INFO L130 BoogieDeclarations]: Found specification of procedure FFmul [2022-10-17 17:38:02,185 INFO L138 BoogieDeclarations]: Found implementation of procedure FFmul [2022-10-17 17:38:02,185 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2022-10-17 17:38:02,185 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2022-10-17 17:38:02,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:38:02,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:02,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:38:02,186 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFswap [2022-10-17 17:38:02,186 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2022-10-17 17:38:02,186 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2022-10-17 17:38:02,186 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2022-10-17 17:38:02,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:02,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:02,512 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:02,514 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:03,535 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:03,546 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:03,546 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:38:03,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:03 BoogieIcfgContainer [2022-10-17 17:38:03,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:03,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:03,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:03,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:00" (1/3) ... [2022-10-17 17:38:03,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0c5a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:03, skipping insertion in model container [2022-10-17 17:38:03,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:01" (2/3) ... [2022-10-17 17:38:03,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0c5a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:03, skipping insertion in model container [2022-10-17 17:38:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:03" (3/3) ... [2022-10-17 17:38:03,560 INFO L112 eAbstractionObserver]: Analyzing ICFG 20020406-1.i [2022-10-17 17:38:03,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:03,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-10-17 17:38:03,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:03,672 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;@27b91782, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:03,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-10-17 17:38:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:38:03,687 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:03,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:38:03,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash 228226931, now seen corresponding path program 1 times [2022-10-17 17:38:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730841279] [2022-10-17 17:38:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:03,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:03,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:38:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:38:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:03,984 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 17:38:04,014 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 17:38:04,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:04,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730841279] [2022-10-17 17:38:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730841279] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:04,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:04,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494973245] [2022-10-17 17:38:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:04,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:04,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:04,096 INFO L87 Difference]: Start difference. First operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:04,630 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-10-17 17:38:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:04,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 17:38:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:04,655 INFO L225 Difference]: With dead ends: 182 [2022-10-17 17:38:04,661 INFO L226 Difference]: Without dead ends: 180 [2022-10-17 17:38:04,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:04,670 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:04,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:38:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-10-17 17:38:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-10-17 17:38:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 87 states have (on average 1.6781609195402298) internal successors, (146), 139 states have internal predecessors, (146), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2022-10-17 17:38:04,789 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 5 [2022-10-17 17:38:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:04,791 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2022-10-17 17:38:04,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2022-10-17 17:38:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:38:04,792 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:04,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:38:04,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-10-17 17:38:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:05,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash 228226932, now seen corresponding path program 1 times [2022-10-17 17:38:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:05,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132493414] [2022-10-17 17:38:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:05,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:05,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:05,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:38:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:38:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:05,181 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 17:38:05,202 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 17:38:05,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:05,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132493414] [2022-10-17 17:38:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132493414] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:05,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:05,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294203831] [2022-10-17 17:38:05,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:05,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:05,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:05,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:05,216 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:05,784 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-10-17 17:38:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 17:38:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:05,790 INFO L225 Difference]: With dead ends: 184 [2022-10-17 17:38:05,791 INFO L226 Difference]: Without dead ends: 184 [2022-10-17 17:38:05,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:05,793 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:05,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:38:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-10-17 17:38:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2022-10-17 17:38:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 89 states have (on average 1.651685393258427) internal successors, (147), 140 states have internal predecessors, (147), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2022-10-17 17:38:05,818 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 5 [2022-10-17 17:38:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:05,818 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2022-10-17 17:38:05,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2022-10-17 17:38:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:38:05,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:05,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:05,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:06,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:06,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting DUPFFnewErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:06,043 INFO L85 PathProgramCache]: Analyzing trace with hash 282747829, now seen corresponding path program 1 times [2022-10-17 17:38:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539070565] [2022-10-17 17:38:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:06,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:06,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:38:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:38:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:06,183 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 17:38:06,190 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 17:38:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:06,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:38:06,289 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 17:38:06,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-10-17 17:38:06,315 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 17:38:06,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:06,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539070565] [2022-10-17 17:38:06,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539070565] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:06,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:06,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703024501] [2022-10-17 17:38:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:06,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:06,320 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:06,775 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2022-10-17 17:38:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:38:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:06,780 INFO L225 Difference]: With dead ends: 177 [2022-10-17 17:38:06,780 INFO L226 Difference]: Without dead ends: 177 [2022-10-17 17:38:06,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:06,782 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:06,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:38:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-10-17 17:38:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-10-17 17:38:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 134 states have internal predecessors, (141), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2022-10-17 17:38:06,803 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 7 [2022-10-17 17:38:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:06,803 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2022-10-17 17:38:06,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2022-10-17 17:38:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:38:06,805 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:06,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:06,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:07,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:07,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting DUPFFnewErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1865414411, now seen corresponding path program 1 times [2022-10-17 17:38:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988119500] [2022-10-17 17:38:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:07,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:07,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 17:38:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:38:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:07,153 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 17:38:07,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:07,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-10-17 17:38:07,299 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 17:38:07,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:07,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988119500] [2022-10-17 17:38:07,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988119500] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:07,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:07,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:38:07,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111809375] [2022-10-17 17:38:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:07,308 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:08,289 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2022-10-17 17:38:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:38:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:38:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:08,295 INFO L225 Difference]: With dead ends: 186 [2022-10-17 17:38:08,295 INFO L226 Difference]: Without dead ends: 186 [2022-10-17 17:38:08,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:38:08,297 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 28 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:08,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 811 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:38:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-17 17:38:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-10-17 17:38:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 133 states have internal predecessors, (140), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-10-17 17:38:08,317 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 11 [2022-10-17 17:38:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:08,318 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-10-17 17:38:08,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-10-17 17:38:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:38:08,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:08,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:08,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-10-17 17:38:08,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:08,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1993271845, now seen corresponding path program 1 times [2022-10-17 17:38:08,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:08,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749995840] [2022-10-17 17:38:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:08,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:08,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 17:38:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:38:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:08,717 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 10 treesize of output 9 [2022-10-17 17:38:08,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:08,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:08,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-10-17 17:38:08,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-17 17:38:09,023 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 17:38:09,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:09,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749995840] [2022-10-17 17:38:09,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749995840] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:09,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:38:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093476780] [2022-10-17 17:38:09,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:09,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:38:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:38:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:09,026 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:10,404 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-10-17 17:38:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:38:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:38:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:10,408 INFO L225 Difference]: With dead ends: 197 [2022-10-17 17:38:10,408 INFO L226 Difference]: Without dead ends: 197 [2022-10-17 17:38:10,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:38:10,409 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:10,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1053 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 17:38:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-10-17 17:38:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-10-17 17:38:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 102 states have (on average 1.5294117647058822) internal successors, (156), 148 states have internal predecessors, (156), 35 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:38:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2022-10-17 17:38:10,427 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 12 [2022-10-17 17:38:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:10,428 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2022-10-17 17:38:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2022-10-17 17:38:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:38:10,429 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:10,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:10,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-10-17 17:38:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:10,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash 335042805, now seen corresponding path program 1 times [2022-10-17 17:38:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:10,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655696521] [2022-10-17 17:38:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:10,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:10,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:10,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:10,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 17:38:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:38:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:10,964 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 17:38:10,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:10,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:10,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655696521] [2022-10-17 17:38:10,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655696521] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:10,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:10,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:38:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948960075] [2022-10-17 17:38:10,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:10,967 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 17:38:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:11,280 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2022-10-17 17:38:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:38:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 17:38:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:11,287 INFO L225 Difference]: With dead ends: 209 [2022-10-17 17:38:11,291 INFO L226 Difference]: Without dead ends: 203 [2022-10-17 17:38:11,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:38:11,293 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 43 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:11,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 757 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:38:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-10-17 17:38:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-10-17 17:38:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 109 states have (on average 1.5045871559633028) internal successors, (164), 156 states have internal predecessors, (164), 35 states have call successors, (35), 9 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-10-17 17:38:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2022-10-17 17:38:11,318 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 21 [2022-10-17 17:38:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:11,321 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2022-10-17 17:38:11,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 17:38:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2022-10-17 17:38:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:38:11,324 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:11,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:11,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:11,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:11,546 INFO L85 PathProgramCache]: Analyzing trace with hash 370721495, now seen corresponding path program 1 times [2022-10-17 17:38:11,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:11,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010301395] [2022-10-17 17:38:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:11,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:11,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:11,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 17:38:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:38:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:11,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:12,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010301395] [2022-10-17 17:38:12,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010301395] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977025639] [2022-10-17 17:38:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:12,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:38:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:38:12,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:38:12,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-10-17 17:38:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:12,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:38:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:12,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:12,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977025639] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288980656] [2022-10-17 17:38:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:12,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:12,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:12,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 17:38:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:38:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:38:13,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288980656] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:13,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-10-17 17:38:13,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 7, 7] total 16 [2022-10-17 17:38:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170842908] [2022-10-17 17:38:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:13,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:38:13,111 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 17:38:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:13,900 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2022-10-17 17:38:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:38:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-10-17 17:38:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:13,904 INFO L225 Difference]: With dead ends: 196 [2022-10-17 17:38:13,904 INFO L226 Difference]: Without dead ends: 196 [2022-10-17 17:38:13,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:38:13,906 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 13 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:13,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 756 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:38:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-10-17 17:38:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-10-17 17:38:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 154 states have internal predecessors, (162), 35 states have call successors, (35), 9 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-10-17 17:38:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 236 transitions. [2022-10-17 17:38:13,922 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 236 transitions. Word has length 22 [2022-10-17 17:38:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:13,922 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 236 transitions. [2022-10-17 17:38:13,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 17:38:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 236 transitions. [2022-10-17 17:38:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:38:13,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:13,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:13,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-10-17 17:38:14,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:14,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:14,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 370721496, now seen corresponding path program 1 times [2022-10-17 17:38:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821344229] [2022-10-17 17:38:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:14,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:14,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:14,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:14,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-10-17 17:38:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:14,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:38:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:14,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:15,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821344229] [2022-10-17 17:38:15,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821344229] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97909893] [2022-10-17 17:38:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:38:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:38:15,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:38:15,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-10-17 17:38:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:38:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:15,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97909893] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:15,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983540750] [2022-10-17 17:38:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:15,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:15,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:15,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:15,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 17:38:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:38:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:15,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:16,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983540750] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:16,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:38:16,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 6] total 15 [2022-10-17 17:38:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525983983] [2022-10-17 17:38:16,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 17:38:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 17:38:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:38:16,173 INFO L87 Difference]: Start difference. First operand 196 states and 236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:38:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:17,363 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2022-10-17 17:38:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:38:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-10-17 17:38:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:17,369 INFO L225 Difference]: With dead ends: 232 [2022-10-17 17:38:17,369 INFO L226 Difference]: Without dead ends: 226 [2022-10-17 17:38:17,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2022-10-17 17:38:17,371 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 151 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:17,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1706 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:38:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-10-17 17:38:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2022-10-17 17:38:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 127 states have (on average 1.4645669291338583) internal successors, (186), 171 states have internal predecessors, (186), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-10-17 17:38:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 260 transitions. [2022-10-17 17:38:17,387 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 260 transitions. Word has length 22 [2022-10-17 17:38:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:17,387 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 260 transitions. [2022-10-17 17:38:17,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:38:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 260 transitions. [2022-10-17 17:38:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:38:17,389 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:17,389 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:17,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:17,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:17,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:18,014 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash -843792010, now seen corresponding path program 2 times [2022-10-17 17:38:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:18,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050257256] [2022-10-17 17:38:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:38:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:18,017 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:18,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-10-17 17:38:18,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 17:38:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:38:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:38:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:38:18,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:18,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:18,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050257256] [2022-10-17 17:38:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050257256] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:18,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:18,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:38:18,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736658121] [2022-10-17 17:38:18,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:38:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:38:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:18,410 INFO L87 Difference]: Start difference. First operand 214 states and 260 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 17:38:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:19,230 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions. [2022-10-17 17:38:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:38:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 25 [2022-10-17 17:38:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:19,234 INFO L225 Difference]: With dead ends: 212 [2022-10-17 17:38:19,234 INFO L226 Difference]: Without dead ends: 212 [2022-10-17 17:38:19,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:19,235 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:19,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 809 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:38:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-10-17 17:38:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-10-17 17:38:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 127 states have (on average 1.4488188976377954) internal successors, (184), 169 states have internal predecessors, (184), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-10-17 17:38:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 258 transitions. [2022-10-17 17:38:19,250 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 258 transitions. Word has length 25 [2022-10-17 17:38:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:19,251 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 258 transitions. [2022-10-17 17:38:19,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 17:38:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 258 transitions. [2022-10-17 17:38:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 17:38:19,252 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:19,253 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:19,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:19,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:38:19,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-10-17 17:38:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -387748378, now seen corresponding path program 1 times [2022-10-17 17:38:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:38:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076615787] [2022-10-17 17:38:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:19,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:38:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:38:19,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:38:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-10-17 17:38:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:38:19,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:20,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076615787] [2022-10-17 17:38:20,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076615787] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549760219] [2022-10-17 17:38:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:38:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:38:20,518 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:38:20,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-10-17 17:38:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:20,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:38:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:20,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:21,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549760219] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:21,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330825139] [2022-10-17 17:38:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:21,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:21,182 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:21,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_843c14d0-6cc1-4b22-9034-96b96b35e48e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 17:38:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:38:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:21,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330825139] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:22,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:38:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2022-10-17 17:38:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569282596] [2022-10-17 17:38:22,394 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-17 17:38:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:38:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-17 17:38:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-10-17 17:38:22,405 INFO L87 Difference]: Start difference. First operand 212 states and 258 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)