./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- 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-38b53e6 [2022-11-25 18:30:15,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:30:15,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:30:15,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:30:15,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:30:15,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:30:15,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:30:15,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:30:15,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:30:15,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:30:15,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:30:15,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:30:15,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:30:15,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:30:15,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:30:15,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:30:15,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:30:15,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:30:15,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:30:15,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:30:15,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:30:15,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:30:15,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:30:15,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:30:15,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:30:15,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:30:15,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:30:15,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:30:15,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:30:15,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:30:15,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:30:15,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:30:15,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:30:15,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:30:15,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:30:15,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:30:15,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:30:15,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:30:15,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:30:15,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:30:15,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:30:15,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:30:15,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:30:15,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:30:15,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:30:15,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:30:15,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:30:15,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:30:15,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:30:15,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:30:15,888 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:30:15,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:30:15,890 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:30:15,890 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:30:15,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:30:15,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:30:15,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:30:15,891 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:30:15,892 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:30:15,892 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:30:15,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:30:15,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:30:15,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:30:15,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:30:15,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:30:15,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:30:15,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:30:15,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:15,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:30:15,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:30:15,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:30:15,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:30:15,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:30:15,896 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:30:15,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:30:15,896 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2022-11-25 18:30:16,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:30:16,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:30:16,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:30:16,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:30:16,288 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:30:16,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-11-25 18:30:19,426 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:30:19,664 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:30:19,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-11-25 18:30:19,675 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/69f4617ac/967b8edc3ebb4c69af009cc4ccf064f5/FLAG80ac05c23 [2022-11-25 18:30:19,690 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/69f4617ac/967b8edc3ebb4c69af009cc4ccf064f5 [2022-11-25 18:30:19,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:30:19,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:30:19,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:19,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:30:19,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:30:19,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:19" (1/1) ... [2022-11-25 18:30:19,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317bf9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:19, skipping insertion in model container [2022-11-25 18:30:19,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:19" (1/1) ... [2022-11-25 18:30:19,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:30:19,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:30:19,909 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-11-25 18:30:19,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:19,944 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) [2022-11-25 18:30:19,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a76fc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:19, skipping insertion in model container [2022-11-25 18:30:19,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:19,946 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:30:19,947 INFO L158 Benchmark]: Toolchain (without parser) took 252.76ms. Allocated memory is still 163.6MB. Free memory was 123.3MB in the beginning and 112.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:30:19,948 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:30:19,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.29ms. Allocated memory is still 163.6MB. Free memory was 123.3MB in the beginning and 112.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:30:19,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.29ms. Allocated memory is still 163.6MB. Free memory was 123.3MB in the beginning and 112.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- 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-38b53e6 [2022-11-25 18:30:22,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:30:22,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:30:22,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:30:22,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:30:22,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:30:22,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:30:22,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:30:22,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:30:22,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:30:22,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:30:22,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:30:22,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:30:22,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:30:22,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:30:22,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:30:22,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:30:22,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:30:22,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:30:22,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:30:22,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:30:22,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:30:22,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:30:22,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:30:22,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:30:22,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:30:22,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:30:22,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:30:22,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:30:22,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:30:22,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:30:22,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:30:22,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:30:22,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:30:22,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:30:22,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:30:22,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:30:22,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:30:22,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:30:22,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:30:22,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:30:22,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:30:22,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:30:22,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:30:22,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:30:22,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:30:22,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:30:22,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:30:22,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:30:22,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:30:22,425 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:30:22,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:30:22,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:30:22,429 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:30:22,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:30:22,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:30:22,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:30:22,430 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:30:22,430 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:30:22,431 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:30:22,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:30:22,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:30:22,431 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:30:22,431 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:30:22,432 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:30:22,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:30:22,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:30:22,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:30:22,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:30:22,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:22,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:30:22,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:30:22,434 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:30:22,435 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:30:22,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:30:22,435 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:30:22,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:30:22,435 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:30:22,436 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2022-11-25 18:30:22,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:30:22,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:30:22,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:30:22,864 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:30:22,864 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:30:22,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-11-25 18:30:26,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:30:26,417 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:30:26,417 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-11-25 18:30:26,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/a7357a231/6dab72fc06024992a67a52c07f791b47/FLAG614b7c2c8 [2022-11-25 18:30:26,454 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/data/a7357a231/6dab72fc06024992a67a52c07f791b47 [2022-11-25 18:30:26,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:30:26,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:30:26,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:26,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:30:26,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:30:26,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:26,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f70ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26, skipping insertion in model container [2022-11-25 18:30:26,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:26,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:30:26,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:30:26,773 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-11-25 18:30:26,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:26,826 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:30:26,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:30:26,864 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-11-25 18:30:26,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:26,889 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:30:26,930 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-11-25 18:30:26,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:26,962 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:30:26,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26 WrapperNode [2022-11-25 18:30:26,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:26,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:26,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:30:26,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:30:26,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:26,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,032 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 265 [2022-11-25 18:30:27,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:27,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:30:27,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:30:27,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:30:27,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,068 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:30:27,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:30:27,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:30:27,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:30:27,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (1/1) ... [2022-11-25 18:30:27,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:27,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:27,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:30:27,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:30:27,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:30:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:30:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:30:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:30:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:30:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:30:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:30:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:30:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:30:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:30:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:30:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:30:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:30:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:30:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:30:27,177 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:30:27,387 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:30:27,389 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:30:28,089 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:30:28,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:30:28,099 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 18:30:28,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:28 BoogieIcfgContainer [2022-11-25 18:30:28,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:30:28,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:30:28,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:30:28,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:30:28,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:30:26" (1/3) ... [2022-11-25 18:30:28,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce324c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:28, skipping insertion in model container [2022-11-25 18:30:28,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:26" (2/3) ... [2022-11-25 18:30:28,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce324c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:28, skipping insertion in model container [2022-11-25 18:30:28,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:28" (3/3) ... [2022-11-25 18:30:28,109 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2022-11-25 18:30:28,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:30:28,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-25 18:30:28,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:30:28,285 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:30:28,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 384 transitions, 792 flow [2022-11-25 18:30:28,526 INFO L130 PetriNetUnfolder]: 28/381 cut-off events. [2022-11-25 18:30:28,526 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:30:28,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 381 events. 28/381 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 729 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-11-25 18:30:28,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 384 transitions, 792 flow [2022-11-25 18:30:28,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 376 transitions, 770 flow [2022-11-25 18:30:28,556 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:30:28,575 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 376 transitions, 770 flow [2022-11-25 18:30:28,578 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 376 transitions, 770 flow [2022-11-25 18:30:28,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 376 transitions, 770 flow [2022-11-25 18:30:28,681 INFO L130 PetriNetUnfolder]: 28/376 cut-off events. [2022-11-25 18:30:28,682 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:30:28,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 376 events. 28/376 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 725 event pairs, 0 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-11-25 18:30:28,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 24864 [2022-11-25 18:31:14,370 INFO L134 LiptonReduction]: Checked pairs total: 25816 [2022-11-25 18:31:14,370 INFO L136 LiptonReduction]: Total number of compositions: 449 [2022-11-25 18:31:14,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:31:14,455 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=PETRI_NET, 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;@5d79a11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:31:14,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-25 18:31:14,462 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:31:14,462 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:14,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:14,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:31:14,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:31:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash 48929, now seen corresponding path program 1 times [2022-11-25 18:31:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:31:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582117904] [2022-11-25 18:31:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:14,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:14,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:31:14,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:31:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:31:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:31:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:14,881 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:31:14,882 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:31:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:14,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:31:14,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:31:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582117904] [2022-11-25 18:31:14,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582117904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:14,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:14,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694500873] [2022-11-25 18:31:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:14,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:14,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:31:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:15,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 833 [2022-11-25 18:31:15,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:15,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:15,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 833 [2022-11-25 18:31:15,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:17,089 INFO L130 PetriNetUnfolder]: 5952/8295 cut-off events. [2022-11-25 18:31:17,090 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-11-25 18:31:17,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16805 conditions, 8295 events. 5952/8295 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41466 event pairs, 5113 based on Foata normal form. 0/2941 useless extension candidates. Maximal degree in co-relation 15248. Up to 8295 conditions per place. [2022-11-25 18:31:17,145 INFO L137 encePairwiseOnDemand]: 827/833 looper letters, 56 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-11-25 18:31:17,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 246 flow [2022-11-25 18:31:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1082 transitions. [2022-11-25 18:31:17,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43297318927571027 [2022-11-25 18:31:17,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1082 transitions. [2022-11-25 18:31:17,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1082 transitions. [2022-11-25 18:31:17,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:17,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1082 transitions. [2022-11-25 18:31:17,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.6666666666667) internal successors, (1082), 3 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:17,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:17,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:17,213 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 1082 transitions. [2022-11-25 18:31:17,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 246 flow [2022-11-25 18:31:17,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:31:17,227 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2022-11-25 18:31:17,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2022-11-25 18:31:17,234 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2022-11-25 18:31:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2022-11-25 18:31:17,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:17,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:17,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:31:17,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:17,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:31:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash 48930, now seen corresponding path program 1 times [2022-11-25 18:31:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:31:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976403175] [2022-11-25 18:31:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:17,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:17,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:31:17,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:31:17,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 18:31:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:31:17,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:17,683 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:31:17,684 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:31:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:17,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:31:17,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:31:17,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976403175] [2022-11-25 18:31:17,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976403175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:17,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:17,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091529250] [2022-11-25 18:31:17,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:31:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:18,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 833 [2022-11-25 18:31:18,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:18,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:18,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 833 [2022-11-25 18:31:18,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:21,202 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2022-11-25 18:31:21,202 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-25 18:31:21,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33322 conditions, 16586 events. 11903/16586 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91237 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 33316. Up to 8296 conditions per place. [2022-11-25 18:31:21,317 INFO L137 encePairwiseOnDemand]: 824/833 looper letters, 104 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2022-11-25 18:31:21,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 454 flow [2022-11-25 18:31:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-11-25 18:31:21,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497799119647859 [2022-11-25 18:31:21,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-11-25 18:31:21,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-11-25 18:31:21,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:21,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-11-25 18:31:21,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:21,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:21,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:21,337 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 3 states and 1124 transitions. [2022-11-25 18:31:21,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 454 flow [2022-11-25 18:31:21,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 110 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:21,341 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 171 flow [2022-11-25 18:31:21,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2022-11-25 18:31:21,342 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2022-11-25 18:31:21,342 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 171 flow [2022-11-25 18:31:21,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:21,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:21,344 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:31:21,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-25 18:31:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:21,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:31:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1527010, now seen corresponding path program 1 times [2022-11-25 18:31:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:31:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796562586] [2022-11-25 18:31:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:21,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:21,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:31:21,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:31:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 18:31:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:21,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:31:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:21,767 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:31:21,767 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:31:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:21,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:31:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796562586] [2022-11-25 18:31:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796562586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:21,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:31:21,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:31:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659708434] [2022-11-25 18:31:21,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:31:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:31:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:31:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:31:23,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 833 [2022-11-25 18:31:23,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:23,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:23,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 833 [2022-11-25 18:31:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:25,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:32,285 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2022-11-25 18:31:32,285 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-11-25 18:31:32,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83329 conditions, 41459 events. 29756/41459 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 254582 event pairs, 25565 based on Foata normal form. 0/14716 useless extension candidates. Maximal degree in co-relation 83320. Up to 8297 conditions per place. [2022-11-25 18:31:32,509 INFO L137 encePairwiseOnDemand]: 824/833 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2022-11-25 18:31:32,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 269 transitions, 1189 flow [2022-11-25 18:31:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:31:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:31:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2264 transitions. [2022-11-25 18:31:32,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4529811924769908 [2022-11-25 18:31:32,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2264 transitions. [2022-11-25 18:31:32,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2264 transitions. [2022-11-25 18:31:32,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:32,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2264 transitions. [2022-11-25 18:31:32,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 377.3333333333333) internal successors, (2264), 6 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:32,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 833.0) internal successors, (5831), 7 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:32,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 833.0) internal successors, (5831), 7 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:32,535 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 171 flow. Second operand 6 states and 2264 transitions. [2022-11-25 18:31:32,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 269 transitions, 1189 flow [2022-11-25 18:31:32,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:32,543 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2022-11-25 18:31:32,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2022-11-25 18:31:32,549 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-11-25 18:31:32,549 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2022-11-25 18:31:32,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:32,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:32,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:31:32,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:32,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:32,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:31:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash 47469732, now seen corresponding path program 1 times [2022-11-25 18:31:32,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:31:32,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411462703] [2022-11-25 18:31:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:32,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:31:32,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:31:32,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 18:31:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:31:32,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:32,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:31:32,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:31:32,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411462703] [2022-11-25 18:31:32,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411462703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:32,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:32,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:31:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632746814] [2022-11-25 18:31:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:31:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:32,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:33,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 833 [2022-11-25 18:31:33,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:33,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:33,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 833 [2022-11-25 18:31:33,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:37,153 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2022-11-25 18:31:37,154 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-11-25 18:31:37,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200703 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2022-11-25 18:31:37,318 INFO L137 encePairwiseOnDemand]: 824/833 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2022-11-25 18:31:37,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2022-11-25 18:31:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-11-25 18:31:37,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377751100440176 [2022-11-25 18:31:37,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-11-25 18:31:37,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-11-25 18:31:37,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:37,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-11-25 18:31:37,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:37,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:37,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:37,333 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 1094 transitions. [2022-11-25 18:31:37,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2022-11-25 18:31:37,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:37,336 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2022-11-25 18:31:37,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2022-11-25 18:31:37,337 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-11-25 18:31:37,338 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2022-11-25 18:31:37,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:37,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:37,339 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:31:37,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:37,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:37,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:31:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:37,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1743376606, now seen corresponding path program 2 times [2022-11-25 18:31:37,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:31:37,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919067601] [2022-11-25 18:31:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:31:37,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:31:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:31:37,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:31:37,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 18:31:37,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:31:37,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:31:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:37,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:31:37,807 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:31:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:37,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:38,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:31:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919067601] [2022-11-25 18:31:38,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919067601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:38,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:31:38,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:31:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153529442] [2022-11-25 18:31:38,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:31:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:31:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:31:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:31:46,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 833 [2022-11-25 18:31:46,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 326.0) internal successors, (3912), 12 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:46,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:46,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 833 [2022-11-25 18:31:46,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:49,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:51,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:53,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:55,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:57,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:31:59,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:32:01,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:32:03,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:32:05,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:32:07,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:32:12,414 INFO L130 PetriNetUnfolder]: 11910/16617 cut-off events. [2022-11-25 18:32:12,415 INFO L131 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2022-11-25 18:32:12,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33502 conditions, 16617 events. 11910/16617 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91219 event pairs, 10226 based on Foata normal form. 23/5944 useless extension candidates. Maximal degree in co-relation 33488. Up to 8289 conditions per place. [2022-11-25 18:32:12,530 INFO L137 encePairwiseOnDemand]: 821/833 looper letters, 101 selfloop transitions, 40 changer transitions 0/141 dead transitions. [2022-11-25 18:32:12,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 141 transitions, 819 flow [2022-11-25 18:32:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:32:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:32:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4722 transitions. [2022-11-25 18:32:12,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4049048190704853 [2022-11-25 18:32:12,544 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4722 transitions. [2022-11-25 18:32:12,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4722 transitions. [2022-11-25 18:32:12,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:12,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4722 transitions. [2022-11-25 18:32:12,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 337.2857142857143) internal successors, (4722), 14 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:12,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 833.0) internal successors, (12495), 15 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:12,580 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 833.0) internal successors, (12495), 15 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:12,581 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 14 states and 4722 transitions. [2022-11-25 18:32:12,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 141 transitions, 819 flow [2022-11-25 18:32:12,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 141 transitions, 789 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:32:12,586 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 588 flow [2022-11-25 18:32:12,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=588, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2022-11-25 18:32:12,587 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2022-11-25 18:32:12,587 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 588 flow [2022-11-25 18:32:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 326.0) internal successors, (3912), 12 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:12,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:12,589 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 18:32:12,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:12,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:12,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:32:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash 428693282, now seen corresponding path program 3 times [2022-11-25 18:32:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:32:12,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228550741] [2022-11-25 18:32:12,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:32:12,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:32:12,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:32:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 18:32:13,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 18:32:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:32:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:13,186 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:32:13,186 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:32:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:32:13,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:32:13,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:32:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228550741] [2022-11-25 18:32:13,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228550741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:13,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:32:13,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 18:32:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011182705] [2022-11-25 18:32:13,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:13,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:32:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:32:13,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:32:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:32:19,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 833 [2022-11-25 18:32:19,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 588 flow. Second operand has 14 states, 14 states have (on average 332.14285714285717) internal successors, (4650), 14 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:19,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:19,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 833 [2022-11-25 18:32:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:21,134 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2022-11-25 18:32:21,134 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-25 18:32:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16787 conditions, 8304 events. 5949/8304 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41418 event pairs, 5113 based on Foata normal form. 3/2959 useless extension candidates. Maximal degree in co-relation 16769. Up to 8289 conditions per place. [2022-11-25 18:32:21,187 INFO L137 encePairwiseOnDemand]: 827/833 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2022-11-25 18:32:21,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 66 transitions, 445 flow [2022-11-25 18:32:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:32:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:32:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2717 transitions. [2022-11-25 18:32:21,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40771308523409366 [2022-11-25 18:32:21,199 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2717 transitions. [2022-11-25 18:32:21,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2717 transitions. [2022-11-25 18:32:21,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:21,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2717 transitions. [2022-11-25 18:32:21,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 339.625) internal successors, (2717), 8 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:21,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:21,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:21,226 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 588 flow. Second operand 8 states and 2717 transitions. [2022-11-25 18:32:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 66 transitions, 445 flow [2022-11-25 18:32:21,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 366 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-25 18:32:21,230 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 270 flow [2022-11-25 18:32:21,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2022-11-25 18:32:21,231 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2022-11-25 18:32:21,232 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 270 flow [2022-11-25 18:32:21,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 332.14285714285717) internal successors, (4650), 14 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:21,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:21,233 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-25 18:32:21,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-25 18:32:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:21,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:32:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash 234806052, now seen corresponding path program 1 times [2022-11-25 18:32:21,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:32:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834784248] [2022-11-25 18:32:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:21,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:32:21,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:32:21,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 18:32:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:32:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:22,069 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 18:32:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 18:32:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:22,669 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 18:32:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-25 18:32:23,573 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-25 18:32:23,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-25 18:32:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:32:26,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:32:26,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:32:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834784248] [2022-11-25 18:32:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834784248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:26,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:26,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:32:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908318744] [2022-11-25 18:32:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:32:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:32:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:32:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-25 18:32:29,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:31,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:33,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:35,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:37,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:40,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:42,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:44,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:46,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:48,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:50,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:50,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 833 [2022-11-25 18:32:50,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:50,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:50,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 833 [2022-11-25 18:32:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:52,044 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2022-11-25 18:32:52,044 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 18:32:52,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13169 conditions, 6511 events. 4605/6511 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31727 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13157. Up to 6511 conditions per place. [2022-11-25 18:32:52,077 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-11-25 18:32:52,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 384 flow [2022-11-25 18:32:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:32:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:32:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2022-11-25 18:32:52,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3865546218487395 [2022-11-25 18:32:52,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2022-11-25 18:32:52,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2022-11-25 18:32:52,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:52,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2022-11-25 18:32:52,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:52,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:52,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:52,090 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 270 flow. Second operand 3 states and 966 transitions. [2022-11-25 18:32:52,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 384 flow [2022-11-25 18:32:52,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-25 18:32:52,093 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 222 flow [2022-11-25 18:32:52,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-11-25 18:32:52,094 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-11-25 18:32:52,094 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 222 flow [2022-11-25 18:32:52,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:52,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:52,095 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-25 18:32:52,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:52,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:32:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash 234806050, now seen corresponding path program 1 times [2022-11-25 18:32:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:32:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911788057] [2022-11-25 18:32:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:52,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:32:52,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:32:52,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 18:32:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:32:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:52,834 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 18:32:52,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 18:32:52,860 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 18:32:52,861 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2022-11-25 18:32:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:52,990 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:32:53,143 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:32:53,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 18:32:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:32:53,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:32:53,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:32:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911788057] [2022-11-25 18:32:53,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911788057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:53,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:53,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:32:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254156227] [2022-11-25 18:32:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:53,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:32:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:32:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:32:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:32:54,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 833 [2022-11-25 18:32:54,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 346.4) internal successors, (1732), 5 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:54,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:54,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 833 [2022-11-25 18:32:54,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:55,195 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2022-11-25 18:32:55,195 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 18:32:55,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9561 conditions, 4718 events. 3261/4718 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22499 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9549. Up to 4718 conditions per place. [2022-11-25 18:32:55,218 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2022-11-25 18:32:55,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 332 flow [2022-11-25 18:32:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:32:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:32:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1087 transitions. [2022-11-25 18:32:55,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43497398959583833 [2022-11-25 18:32:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1087 transitions. [2022-11-25 18:32:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1087 transitions. [2022-11-25 18:32:55,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:55,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1087 transitions. [2022-11-25 18:32:55,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:55,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:55,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:55,234 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 222 flow. Second operand 3 states and 1087 transitions. [2022-11-25 18:32:55,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 332 flow [2022-11-25 18:32:55,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:32:55,237 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 209 flow [2022-11-25 18:32:55,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2022-11-25 18:32:55,238 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2022-11-25 18:32:55,238 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 209 flow [2022-11-25 18:32:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 346.4) internal successors, (1732), 5 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:55,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:55,239 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:55,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:55,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:32:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1984617448, now seen corresponding path program 1 times [2022-11-25 18:32:55,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:32:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842890620] [2022-11-25 18:32:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:55,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:55,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:32:55,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:32:55,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 18:32:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:32:55,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:56,044 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:32:56,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 18:32:56,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 18:32:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:56,231 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:32:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:56,340 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:32:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:32:56,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:32:56,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:32:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842890620] [2022-11-25 18:32:56,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842890620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:56,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:56,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:32:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678647304] [2022-11-25 18:32:56,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:32:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:32:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:32:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:32:57,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 833 [2022-11-25 18:32:57,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 347.25) internal successors, (1389), 4 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:57,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:57,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 833 [2022-11-25 18:32:57,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:58,241 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2022-11-25 18:32:58,242 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 18:32:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9194 conditions, 4534 events. 3141/4534 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21422 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9182. Up to 4534 conditions per place. [2022-11-25 18:32:58,268 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2022-11-25 18:32:58,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 325 flow [2022-11-25 18:32:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:32:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:32:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2022-11-25 18:32:58,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2022-11-25 18:32:58,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2022-11-25 18:32:58,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2022-11-25 18:32:58,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:58,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2022-11-25 18:32:58,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:58,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:58,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:58,285 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 209 flow. Second operand 3 states and 1085 transitions. [2022-11-25 18:32:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 325 flow [2022-11-25 18:32:58,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:32:58,288 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 206 flow [2022-11-25 18:32:58,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2022-11-25 18:32:58,290 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-11-25 18:32:58,290 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 206 flow [2022-11-25 18:32:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 347.25) internal successors, (1389), 4 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:58,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:58,291 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:58,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-25 18:32:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:58,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:32:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1984617449, now seen corresponding path program 1 times [2022-11-25 18:32:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:32:58,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625438439] [2022-11-25 18:32:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:58,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:32:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:32:58,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:32:58,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 18:32:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:32:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:58,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:59,067 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 18:32:59,067 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-25 18:32:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:32:59,236 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-25 18:32:59,350 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:32:59,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:32:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:32:59,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:32:59,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:32:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625438439] [2022-11-25 18:32:59,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625438439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:59,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:59,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:32:59,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728372753] [2022-11-25 18:32:59,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:59,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:32:59,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:32:59,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:32:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:32:59,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 833 [2022-11-25 18:32:59,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 349.25) internal successors, (1397), 4 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:59,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:59,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 833 [2022-11-25 18:32:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:00,769 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2022-11-25 18:33:00,770 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 18:33:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8827 conditions, 4350 events. 3021/4350 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20426 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8815. Up to 4350 conditions per place. [2022-11-25 18:33:00,790 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 18:33:00,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 318 flow [2022-11-25 18:33:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:33:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:33:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1089 transitions. [2022-11-25 18:33:00,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43577430972388953 [2022-11-25 18:33:00,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1089 transitions. [2022-11-25 18:33:00,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1089 transitions. [2022-11-25 18:33:00,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:00,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1089 transitions. [2022-11-25 18:33:00,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:00,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:00,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:00,803 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 206 flow. Second operand 3 states and 1089 transitions. [2022-11-25 18:33:00,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 318 flow [2022-11-25 18:33:00,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:33:00,806 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 203 flow [2022-11-25 18:33:00,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2022-11-25 18:33:00,807 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2022-11-25 18:33:00,807 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 203 flow [2022-11-25 18:33:00,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.25) internal successors, (1397), 4 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:00,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:00,808 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:00,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:01,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1393595309, now seen corresponding path program 1 times [2022-11-25 18:33:01,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606018294] [2022-11-25 18:33:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:01,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:01,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 18:33:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:33:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:01,515 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:01,521 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:01,597 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:01,611 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:01,612 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:01,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:01,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606018294] [2022-11-25 18:33:01,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606018294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:01,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:01,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:33:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331617884] [2022-11-25 18:33:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:01,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:02,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 833 [2022-11-25 18:33:02,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:02,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:02,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 833 [2022-11-25 18:33:02,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:03,746 INFO L130 PetriNetUnfolder]: 5349/7696 cut-off events. [2022-11-25 18:33:03,746 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 18:33:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 7696 events. 5349/7696 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41887 event pairs, 2569 based on Foata normal form. 0/3410 useless extension candidates. Maximal degree in co-relation 15562. Up to 4338 conditions per place. [2022-11-25 18:33:03,795 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 90 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2022-11-25 18:33:03,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 468 flow [2022-11-25 18:33:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:33:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:33:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1743 transitions. [2022-11-25 18:33:03,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4184873949579832 [2022-11-25 18:33:03,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1743 transitions. [2022-11-25 18:33:03,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1743 transitions. [2022-11-25 18:33:03,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:03,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1743 transitions. [2022-11-25 18:33:03,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.6) internal successors, (1743), 5 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:03,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:03,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:03,814 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 203 flow. Second operand 5 states and 1743 transitions. [2022-11-25 18:33:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 468 flow [2022-11-25 18:33:03,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:33:03,817 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 218 flow [2022-11-25 18:33:03,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2022-11-25 18:33:03,818 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-11-25 18:33:03,818 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 218 flow [2022-11-25 18:33:03,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:03,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:03,819 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:03,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:04,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1393595384, now seen corresponding path program 1 times [2022-11-25 18:33:04,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154528961] [2022-11-25 18:33:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:04,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:04,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 18:33:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:33:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:04,667 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:33:04,668 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:33:04,717 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:33:04,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 18:33:04,759 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:33:04,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:33:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:04,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:04,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:04,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154528961] [2022-11-25 18:33:04,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154528961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:04,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:04,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:33:04,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099819359] [2022-11-25 18:33:04,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:04,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:33:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:33:04,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:33:05,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 833 [2022-11-25 18:33:05,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:05,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:05,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 833 [2022-11-25 18:33:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:06,291 INFO L130 PetriNetUnfolder]: 4105/5928 cut-off events. [2022-11-25 18:33:06,291 INFO L131 PetriNetUnfolder]: For 826/826 co-relation queries the response was YES. [2022-11-25 18:33:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12673 conditions, 5928 events. 4105/5928 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29105 event pairs, 3527 based on Foata normal form. 0/2924 useless extension candidates. Maximal degree in co-relation 12660. Up to 5922 conditions per place. [2022-11-25 18:33:06,334 INFO L137 encePairwiseOnDemand]: 829/833 looper letters, 55 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2022-11-25 18:33:06,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 328 flow [2022-11-25 18:33:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:33:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:33:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1382 transitions. [2022-11-25 18:33:06,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.414765906362545 [2022-11-25 18:33:06,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1382 transitions. [2022-11-25 18:33:06,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1382 transitions. [2022-11-25 18:33:06,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:06,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1382 transitions. [2022-11-25 18:33:06,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.5) internal successors, (1382), 4 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:06,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:06,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:06,354 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 218 flow. Second operand 4 states and 1382 transitions. [2022-11-25 18:33:06,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 328 flow [2022-11-25 18:33:06,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:33:06,358 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 212 flow [2022-11-25 18:33:06,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2022-11-25 18:33:06,359 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2022-11-25 18:33:06,359 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 212 flow [2022-11-25 18:33:06,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:06,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:06,360 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:06,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:06,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:06,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1393595308, now seen corresponding path program 1 times [2022-11-25 18:33:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580749045] [2022-11-25 18:33:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:06,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:06,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 18:33:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:33:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:07,059 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:07,117 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:33:07,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 18:33:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:07,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:07,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580749045] [2022-11-25 18:33:07,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580749045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:07,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:07,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:33:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093495972] [2022-11-25 18:33:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:33:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:33:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:33:07,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 833 [2022-11-25 18:33:07,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:07,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:07,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 833 [2022-11-25 18:33:07,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:08,222 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2022-11-25 18:33:08,223 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2022-11-25 18:33:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9483 conditions, 4444 events. 3065/4444 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20729 event pairs, 2591 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 9470. Up to 4432 conditions per place. [2022-11-25 18:33:08,244 INFO L137 encePairwiseOnDemand]: 829/833 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-25 18:33:08,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 318 flow [2022-11-25 18:33:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:33:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:33:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2022-11-25 18:33:08,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4141656662665066 [2022-11-25 18:33:08,250 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2022-11-25 18:33:08,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2022-11-25 18:33:08,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:08,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2022-11-25 18:33:08,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:08,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:08,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:08,260 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 212 flow. Second operand 4 states and 1380 transitions. [2022-11-25 18:33:08,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 318 flow [2022-11-25 18:33:08,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:33:08,263 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 209 flow [2022-11-25 18:33:08,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2022-11-25 18:33:08,264 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-11-25 18:33:08,264 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 209 flow [2022-11-25 18:33:08,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:08,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:08,265 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:08,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:08,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1393595383, now seen corresponding path program 1 times [2022-11-25 18:33:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:08,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996409702] [2022-11-25 18:33:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:08,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:08,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:08,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 18:33:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:33:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:09,103 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:33:09,104 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:33:09,232 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:33:09,233 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:33:09,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:09,329 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:09,342 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:09,343 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:09,420 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:33:09,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:33:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:09,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:09,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996409702] [2022-11-25 18:33:09,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996409702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:09,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:09,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:33:09,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324143101] [2022-11-25 18:33:09,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:09,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:09,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:10,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 833 [2022-11-25 18:33:10,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:10,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:10,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 833 [2022-11-25 18:33:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:11,290 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2022-11-25 18:33:11,290 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-11-25 18:33:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8712 conditions, 4062 events. 2797/4062 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19543 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8699. Up to 2608 conditions per place. [2022-11-25 18:33:11,309 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-11-25 18:33:11,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 444 flow [2022-11-25 18:33:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:33:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:33:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1734 transitions. [2022-11-25 18:33:11,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4163265306122449 [2022-11-25 18:33:11,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1734 transitions. [2022-11-25 18:33:11,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1734 transitions. [2022-11-25 18:33:11,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:11,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1734 transitions. [2022-11-25 18:33:11,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:11,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:11,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:11,321 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 209 flow. Second operand 5 states and 1734 transitions. [2022-11-25 18:33:11,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 444 flow [2022-11-25 18:33:11,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:33:11,322 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 218 flow [2022-11-25 18:33:11,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2022-11-25 18:33:11,323 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-11-25 18:33:11,323 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 218 flow [2022-11-25 18:33:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:11,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:11,324 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:11,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:11,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash -251853000, now seen corresponding path program 1 times [2022-11-25 18:33:11,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:11,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171697094] [2022-11-25 18:33:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:11,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:11,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:11,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:11,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 18:33:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:12,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:33:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:12,210 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 18:33:12,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 18:33:12,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2022-11-25 18:33:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:12,372 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:12,520 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:33:12,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 18:33:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:12,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:12,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171697094] [2022-11-25 18:33:12,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171697094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:12,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:12,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:33:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41854162] [2022-11-25 18:33:12,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:13,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 833 [2022-11-25 18:33:13,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 345.2) internal successors, (1726), 5 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:13,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:13,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 833 [2022-11-25 18:33:13,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:14,725 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2022-11-25 18:33:14,725 INFO L131 PetriNetUnfolder]: For 1314/1314 co-relation queries the response was YES. [2022-11-25 18:33:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8688 conditions, 3849 events. 2659/3849 cut-off events. For 1314/1314 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17501 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8674. Up to 3849 conditions per place. [2022-11-25 18:33:14,746 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 18:33:14,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 53 transitions, 320 flow [2022-11-25 18:33:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:33:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:33:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1071 transitions. [2022-11-25 18:33:14,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-11-25 18:33:14,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1071 transitions. [2022-11-25 18:33:14,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1071 transitions. [2022-11-25 18:33:14,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:14,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1071 transitions. [2022-11-25 18:33:14,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:14,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:14,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:14,756 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 218 flow. Second operand 3 states and 1071 transitions. [2022-11-25 18:33:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 53 transitions, 320 flow [2022-11-25 18:33:14,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:33:14,759 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 208 flow [2022-11-25 18:33:14,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2022-11-25 18:33:14,760 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2022-11-25 18:33:14,760 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 208 flow [2022-11-25 18:33:14,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 345.2) internal successors, (1726), 5 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:14,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:14,761 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:14,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:14,967 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash -251853002, now seen corresponding path program 1 times [2022-11-25 18:33:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:14,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793876321] [2022-11-25 18:33:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:14,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:14,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:14,968 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:14,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 18:33:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:15,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:33:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:15,520 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 18:33:15,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-25 18:33:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:15,627 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-25 18:33:15,735 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:33:15,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:33:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:15,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:15,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:15,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793876321] [2022-11-25 18:33:15,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793876321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:15,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:15,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:33:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440903907] [2022-11-25 18:33:15,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:15,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:33:15,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:33:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:33:16,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 833 [2022-11-25 18:33:16,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:16,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:16,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 833 [2022-11-25 18:33:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:16,939 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2022-11-25 18:33:16,939 INFO L131 PetriNetUnfolder]: For 739/739 co-relation queries the response was YES. [2022-11-25 18:33:16,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8005 conditions, 3636 events. 2521/3636 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 16357 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7991. Up to 3636 conditions per place. [2022-11-25 18:33:16,958 INFO L137 encePairwiseOnDemand]: 830/833 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-11-25 18:33:16,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 306 flow [2022-11-25 18:33:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:33:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:33:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2022-11-25 18:33:16,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42777110844337735 [2022-11-25 18:33:16,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2022-11-25 18:33:16,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2022-11-25 18:33:16,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:16,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2022-11-25 18:33:16,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.3333333333333) internal successors, (1069), 3 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:16,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:16,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 833.0) internal successors, (3332), 4 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:16,969 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 208 flow. Second operand 3 states and 1069 transitions. [2022-11-25 18:33:16,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 306 flow [2022-11-25 18:33:16,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:33:16,972 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 205 flow [2022-11-25 18:33:16,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2022-11-25 18:33:16,974 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2022-11-25 18:33:16,975 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 205 flow [2022-11-25 18:33:16,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:16,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:16,976 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:16,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:17,191 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 782495726, now seen corresponding path program 1 times [2022-11-25 18:33:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049750875] [2022-11-25 18:33:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:17,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 18:33:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:33:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:17,570 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:17,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:17,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049750875] [2022-11-25 18:33:17,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049750875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:17,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:17,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:33:17,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554539628] [2022-11-25 18:33:17,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:17,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:17,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:18,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 833 [2022-11-25 18:33:18,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:18,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:18,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 833 [2022-11-25 18:33:18,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:19,313 INFO L130 PetriNetUnfolder]: 4315/6208 cut-off events. [2022-11-25 18:33:19,313 INFO L131 PetriNetUnfolder]: For 1309/1309 co-relation queries the response was YES. [2022-11-25 18:33:19,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13615 conditions, 6208 events. 4315/6208 cut-off events. For 1309/1309 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31831 event pairs, 2113 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 13601. Up to 3618 conditions per place. [2022-11-25 18:33:19,352 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2022-11-25 18:33:19,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 431 flow [2022-11-25 18:33:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:33:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:33:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1755 transitions. [2022-11-25 18:33:19,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42136854741896757 [2022-11-25 18:33:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1755 transitions. [2022-11-25 18:33:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1755 transitions. [2022-11-25 18:33:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1755 transitions. [2022-11-25 18:33:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:19,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:19,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:19,364 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 205 flow. Second operand 5 states and 1755 transitions. [2022-11-25 18:33:19,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 431 flow [2022-11-25 18:33:19,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:33:19,367 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 220 flow [2022-11-25 18:33:19,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2022-11-25 18:33:19,368 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-11-25 18:33:19,368 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 220 flow [2022-11-25 18:33:19,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:19,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:19,369 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:19,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:19,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:19,587 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:19,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:19,587 INFO L85 PathProgramCache]: Analyzing trace with hash 782495727, now seen corresponding path program 1 times [2022-11-25 18:33:19,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:19,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571300215] [2022-11-25 18:33:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:19,589 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:19,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 18:33:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:33:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:19,985 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:20,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:20,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:20,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571300215] [2022-11-25 18:33:20,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571300215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:20,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:20,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:33:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365648164] [2022-11-25 18:33:20,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:33:20,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:33:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:33:20,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 833 [2022-11-25 18:33:20,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:20,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:20,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 833 [2022-11-25 18:33:20,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:21,108 INFO L130 PetriNetUnfolder]: 3069/4434 cut-off events. [2022-11-25 18:33:21,108 INFO L131 PetriNetUnfolder]: For 1556/1556 co-relation queries the response was YES. [2022-11-25 18:33:21,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10404 conditions, 4434 events. 3069/4434 cut-off events. For 1556/1556 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20588 event pairs, 2591 based on Foata normal form. 0/2994 useless extension candidates. Maximal degree in co-relation 10389. Up to 4416 conditions per place. [2022-11-25 18:33:21,139 INFO L137 encePairwiseOnDemand]: 829/833 looper letters, 48 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-11-25 18:33:21,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 50 transitions, 316 flow [2022-11-25 18:33:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:33:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:33:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1374 transitions. [2022-11-25 18:33:21,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41236494597839135 [2022-11-25 18:33:21,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1374 transitions. [2022-11-25 18:33:21,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1374 transitions. [2022-11-25 18:33:21,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:21,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1374 transitions. [2022-11-25 18:33:21,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.5) internal successors, (1374), 4 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:21,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:21,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 833.0) internal successors, (4165), 5 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:21,148 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 220 flow. Second operand 4 states and 1374 transitions. [2022-11-25 18:33:21,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 50 transitions, 316 flow [2022-11-25 18:33:21,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 50 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:33:21,150 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 214 flow [2022-11-25 18:33:21,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2022-11-25 18:33:21,151 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-11-25 18:33:21,151 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 214 flow [2022-11-25 18:33:21,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:21,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:21,151 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:21,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:21,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 782495658, now seen corresponding path program 1 times [2022-11-25 18:33:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:21,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667411884] [2022-11-25 18:33:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:21,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:21,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:21,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 18:33:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:33:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:21,894 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:21,900 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:21,964 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:21,973 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:21,974 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:22,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:22,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667411884] [2022-11-25 18:33:22,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667411884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:22,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:33:22,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856415698] [2022-11-25 18:33:22,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:22,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:22,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:22,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 833 [2022-11-25 18:33:22,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:22,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:22,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 833 [2022-11-25 18:33:22,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:23,543 INFO L130 PetriNetUnfolder]: 2768/4005 cut-off events. [2022-11-25 18:33:23,543 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-25 18:33:23,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9337 conditions, 4005 events. 2768/4005 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18820 event pairs, 1507 based on Foata normal form. 0/2783 useless extension candidates. Maximal degree in co-relation 9322. Up to 2662 conditions per place. [2022-11-25 18:33:23,560 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 69 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2022-11-25 18:33:23,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 422 flow [2022-11-25 18:33:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:33:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:33:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1720 transitions. [2022-11-25 18:33:23,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4129651860744298 [2022-11-25 18:33:23,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1720 transitions. [2022-11-25 18:33:23,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1720 transitions. [2022-11-25 18:33:23,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:23,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1720 transitions. [2022-11-25 18:33:23,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:23,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:23,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:23,572 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 214 flow. Second operand 5 states and 1720 transitions. [2022-11-25 18:33:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 422 flow [2022-11-25 18:33:23,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:33:23,574 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 223 flow [2022-11-25 18:33:23,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2022-11-25 18:33:23,574 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-11-25 18:33:23,575 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 223 flow [2022-11-25 18:33:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:23,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:23,575 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:23,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:23,776 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 784751319, now seen corresponding path program 1 times [2022-11-25 18:33:23,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:23,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120473961] [2022-11-25 18:33:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:23,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:23,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:23,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 18:33:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:33:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:24,462 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:33:24,462 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:33:24,601 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:33:24,602 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:33:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:24,712 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:24,724 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:24,724 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:24,782 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:33:24,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:33:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:24,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:33:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:27,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:27,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120473961] [2022-11-25 18:33:27,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120473961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:33:27,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:33:27,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-25 18:33:27,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404561020] [2022-11-25 18:33:27,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:33:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:33:27,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:33:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:33:30,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:33,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:35,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:38,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:40,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:43,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:33:45,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 833 [2022-11-25 18:33:45,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 328.1818181818182) internal successors, (3610), 11 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:45,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:45,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 833 [2022-11-25 18:33:45,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:48,010 INFO L130 PetriNetUnfolder]: 6108/8787 cut-off events. [2022-11-25 18:33:48,010 INFO L131 PetriNetUnfolder]: For 3833/3833 co-relation queries the response was YES. [2022-11-25 18:33:48,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21265 conditions, 8787 events. 6108/8787 cut-off events. For 3833/3833 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 44994 event pairs, 991 based on Foata normal form. 330/6655 useless extension candidates. Maximal degree in co-relation 21249. Up to 2026 conditions per place. [2022-11-25 18:33:48,068 INFO L137 encePairwiseOnDemand]: 826/833 looper letters, 146 selfloop transitions, 9 changer transitions 0/155 dead transitions. [2022-11-25 18:33:48,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 155 transitions, 837 flow [2022-11-25 18:33:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:33:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:33:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2749 transitions. [2022-11-25 18:33:48,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.412515006002401 [2022-11-25 18:33:48,073 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2749 transitions. [2022-11-25 18:33:48,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2749 transitions. [2022-11-25 18:33:48,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:48,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2749 transitions. [2022-11-25 18:33:48,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 343.625) internal successors, (2749), 8 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:48,082 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:48,083 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 223 flow. Second operand 8 states and 2749 transitions. [2022-11-25 18:33:48,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 155 transitions, 837 flow [2022-11-25 18:33:48,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 155 transitions, 813 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:33:48,087 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 270 flow [2022-11-25 18:33:48,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2022-11-25 18:33:48,087 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2022-11-25 18:33:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 270 flow [2022-11-25 18:33:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 328.1818181818182) internal successors, (3610), 11 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:48,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:48,089 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:48,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:48,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:48,290 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash 784751393, now seen corresponding path program 1 times [2022-11-25 18:33:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:48,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307157715] [2022-11-25 18:33:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:48,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:48,292 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:48,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 18:33:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:33:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:48,840 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:48,889 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:33:48,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:33:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:48,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:33:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:49,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:49,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307157715] [2022-11-25 18:33:49,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307157715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:33:49,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:33:49,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:33:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584051] [2022-11-25 18:33:49,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:33:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:33:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:33:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:33:53,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 833 [2022-11-25 18:33:53,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 339.2) internal successors, (3392), 10 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:53,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:53,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 833 [2022-11-25 18:33:53,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:55,408 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2022-11-25 18:33:55,408 INFO L131 PetriNetUnfolder]: For 5640/5640 co-relation queries the response was YES. [2022-11-25 18:33:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21865 conditions, 8304 events. 5735/8304 cut-off events. For 5640/5640 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 42489 event pairs, 1457 based on Foata normal form. 330/6800 useless extension candidates. Maximal degree in co-relation 21845. Up to 2560 conditions per place. [2022-11-25 18:33:55,475 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 146 selfloop transitions, 7 changer transitions 0/153 dead transitions. [2022-11-25 18:33:55,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 153 transitions, 850 flow [2022-11-25 18:33:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:33:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:33:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2835 transitions. [2022-11-25 18:33:55,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4254201680672269 [2022-11-25 18:33:55,480 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2835 transitions. [2022-11-25 18:33:55,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2835 transitions. [2022-11-25 18:33:55,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:55,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2835 transitions. [2022-11-25 18:33:55,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 354.375) internal successors, (2835), 8 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:55,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:55,490 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:55,491 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 270 flow. Second operand 8 states and 2835 transitions. [2022-11-25 18:33:55,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 153 transitions, 850 flow [2022-11-25 18:33:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 153 transitions, 833 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 18:33:55,524 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 273 flow [2022-11-25 18:33:55,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2022-11-25 18:33:55,525 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2022-11-25 18:33:55,525 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 273 flow [2022-11-25 18:33:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.2) internal successors, (3392), 10 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:55,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:55,526 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:55,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:55,742 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash 356180467, now seen corresponding path program 1 times [2022-11-25 18:33:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167269590] [2022-11-25 18:33:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:55,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:55,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:55,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 18:33:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:33:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:56,459 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:33:56,459 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:33:56,581 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:33:56,581 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:33:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:33:56,672 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:56,681 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:33:56,682 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:33:56,736 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:33:56,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:33:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:33:56,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:33:56,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:33:56,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167269590] [2022-11-25 18:33:56,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167269590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:56,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:56,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:33:56,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056324890] [2022-11-25 18:33:56,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:56,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:33:56,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:33:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:33:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:33:57,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 833 [2022-11-25 18:33:57,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 334.8) internal successors, (1674), 5 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:57,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:57,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 833 [2022-11-25 18:33:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:59,574 INFO L130 PetriNetUnfolder]: 8765/12656 cut-off events. [2022-11-25 18:33:59,575 INFO L131 PetriNetUnfolder]: For 9625/9625 co-relation queries the response was YES. [2022-11-25 18:33:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33072 conditions, 12656 events. 8765/12656 cut-off events. For 9625/9625 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 69817 event pairs, 4925 based on Foata normal form. 0/9514 useless extension candidates. Maximal degree in co-relation 33052. Up to 8298 conditions per place. [2022-11-25 18:33:59,676 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 78 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2022-11-25 18:33:59,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 564 flow [2022-11-25 18:33:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:33:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:33:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1719 transitions. [2022-11-25 18:33:59,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41272509003601443 [2022-11-25 18:33:59,681 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1719 transitions. [2022-11-25 18:33:59,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1719 transitions. [2022-11-25 18:33:59,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:59,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1719 transitions. [2022-11-25 18:33:59,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 343.8) internal successors, (1719), 5 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:59,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:59,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:59,687 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 273 flow. Second operand 5 states and 1719 transitions. [2022-11-25 18:33:59,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 564 flow [2022-11-25 18:33:59,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 544 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:33:59,700 INFO L231 Difference]: Finished difference. Result has 79 places, 55 transitions, 277 flow [2022-11-25 18:33:59,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2022-11-25 18:33:59,701 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2022-11-25 18:33:59,701 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 277 flow [2022-11-25 18:33:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.8) internal successors, (1674), 5 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:59,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:59,702 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:59,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:59,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:59,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:33:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash 356180623, now seen corresponding path program 1 times [2022-11-25 18:33:59,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:33:59,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3772530] [2022-11-25 18:33:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:59,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:33:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:33:59,912 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:33:59,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 18:34:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:34:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:00,317 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:00,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:00,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:34:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3772530] [2022-11-25 18:34:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3772530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992320586] [2022-11-25 18:34:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:34:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:34:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:34:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:00,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 833 [2022-11-25 18:34:00,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 340.8) internal successors, (1704), 5 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:00,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 833 [2022-11-25 18:34:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:02,783 INFO L130 PetriNetUnfolder]: 7755/11212 cut-off events. [2022-11-25 18:34:02,783 INFO L131 PetriNetUnfolder]: For 8478/8478 co-relation queries the response was YES. [2022-11-25 18:34:02,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30937 conditions, 11212 events. 7755/11212 cut-off events. For 8478/8478 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 59965 event pairs, 4925 based on Foata normal form. 0/9482 useless extension candidates. Maximal degree in co-relation 30916. Up to 8286 conditions per place. [2022-11-25 18:34:02,875 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 77 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2022-11-25 18:34:02,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 554 flow [2022-11-25 18:34:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:34:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:34:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1748 transitions. [2022-11-25 18:34:02,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41968787515006 [2022-11-25 18:34:02,878 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1748 transitions. [2022-11-25 18:34:02,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1748 transitions. [2022-11-25 18:34:02,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:02,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1748 transitions. [2022-11-25 18:34:02,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.6) internal successors, (1748), 5 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,884 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,885 INFO L175 Difference]: Start difference. First operand has 79 places, 55 transitions, 277 flow. Second operand 5 states and 1748 transitions. [2022-11-25 18:34:02,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 554 flow [2022-11-25 18:34:02,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 548 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:34:02,899 INFO L231 Difference]: Finished difference. Result has 81 places, 55 transitions, 283 flow [2022-11-25 18:34:02,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2022-11-25 18:34:02,900 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2022-11-25 18:34:02,900 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 283 flow [2022-11-25 18:34:02,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.8) internal successors, (1704), 5 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:02,901 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:02,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:03,115 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:34:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 359165900, now seen corresponding path program 1 times [2022-11-25 18:34:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:34:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994250262] [2022-11-25 18:34:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:34:03,117 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:34:03,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 18:34:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:34:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:03,601 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:04,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:34:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994250262] [2022-11-25 18:34:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994250262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:04,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:34:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478527980] [2022-11-25 18:34:04,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:34:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:34:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:34:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:07,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 833 [2022-11-25 18:34:07,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 339.4) internal successors, (3394), 10 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:07,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:07,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 833 [2022-11-25 18:34:07,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:11,866 INFO L130 PetriNetUnfolder]: 18069/26092 cut-off events. [2022-11-25 18:34:11,866 INFO L131 PetriNetUnfolder]: For 27582/27582 co-relation queries the response was YES. [2022-11-25 18:34:12,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74204 conditions, 26092 events. 18069/26092 cut-off events. For 27582/27582 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 154872 event pairs, 4417 based on Foata normal form. 1074/24022 useless extension candidates. Maximal degree in co-relation 74182. Up to 7434 conditions per place. [2022-11-25 18:34:12,111 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 166 selfloop transitions, 7 changer transitions 0/173 dead transitions. [2022-11-25 18:34:12,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 173 transitions, 1149 flow [2022-11-25 18:34:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:34:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2830 transitions. [2022-11-25 18:34:12,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42466986794717887 [2022-11-25 18:34:12,115 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2830 transitions. [2022-11-25 18:34:12,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2830 transitions. [2022-11-25 18:34:12,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:12,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2830 transitions. [2022-11-25 18:34:12,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 353.75) internal successors, (2830), 8 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,123 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,123 INFO L175 Difference]: Start difference. First operand has 81 places, 55 transitions, 283 flow. Second operand 8 states and 2830 transitions. [2022-11-25 18:34:12,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 173 transitions, 1149 flow [2022-11-25 18:34:12,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 173 transitions, 1125 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:34:12,148 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 315 flow [2022-11-25 18:34:12,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2022-11-25 18:34:12,149 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2022-11-25 18:34:12,149 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 315 flow [2022-11-25 18:34:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.4) internal successors, (3394), 10 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:12,150 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:12,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:12,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:12,370 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:34:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash 359165832, now seen corresponding path program 1 times [2022-11-25 18:34:12,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:34:12,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113056651] [2022-11-25 18:34:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:12,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:12,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:34:12,372 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:34:12,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 18:34:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:34:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:12,953 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:12,966 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:13,034 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:13,048 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:13,048 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:13,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:15,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:34:15,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113056651] [2022-11-25 18:34:15,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113056651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:15,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:15,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:34:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547073533] [2022-11-25 18:34:15,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:34:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:34:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:34:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:22,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:28,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:28,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 833 [2022-11-25 18:34:28,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 331.6) internal successors, (3316), 10 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:28,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:28,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 833 [2022-11-25 18:34:28,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:32,491 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2022-11-25 18:34:32,492 INFO L131 PetriNetUnfolder]: For 27629/27629 co-relation queries the response was YES. [2022-11-25 18:34:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66019 conditions, 22492 events. 15543/22492 cut-off events. For 27629/27629 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 130646 event pairs, 2857 based on Foata normal form. 1074/20608 useless extension candidates. Maximal degree in co-relation 65994. Up to 6160 conditions per place. [2022-11-25 18:34:32,704 INFO L137 encePairwiseOnDemand]: 826/833 looper letters, 160 selfloop transitions, 10 changer transitions 0/170 dead transitions. [2022-11-25 18:34:32,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 170 transitions, 1135 flow [2022-11-25 18:34:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:34:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2762 transitions. [2022-11-25 18:34:32,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144657863145258 [2022-11-25 18:34:32,710 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2762 transitions. [2022-11-25 18:34:32,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2762 transitions. [2022-11-25 18:34:32,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:32,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2762 transitions. [2022-11-25 18:34:32,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 345.25) internal successors, (2762), 8 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,722 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,722 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 315 flow. Second operand 8 states and 2762 transitions. [2022-11-25 18:34:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 170 transitions, 1135 flow [2022-11-25 18:34:32,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 170 transitions, 1124 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 18:34:32,828 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 349 flow [2022-11-25 18:34:32,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2022-11-25 18:34:32,829 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 30 predicate places. [2022-11-25 18:34:32,829 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 349 flow [2022-11-25 18:34:32,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 331.6) internal successors, (3316), 10 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:32,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:32,829 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:32,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:33,030 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:34:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1843296062, now seen corresponding path program 1 times [2022-11-25 18:34:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:34:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432329664] [2022-11-25 18:34:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:33,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:34:33,032 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:34:33,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 18:34:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:34:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:33,460 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:33,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:34,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:34:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432329664] [2022-11-25 18:34:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432329664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:34,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:34,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:34:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9990684] [2022-11-25 18:34:34,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:34:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:34:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:34:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:37,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 833 [2022-11-25 18:34:37,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 349 flow. Second operand has 10 states, 10 states have (on average 339.6) internal successors, (3396), 10 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:37,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:37,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 833 [2022-11-25 18:34:37,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:46,748 INFO L130 PetriNetUnfolder]: 33813/48814 cut-off events. [2022-11-25 18:34:46,748 INFO L131 PetriNetUnfolder]: For 92851/92851 co-relation queries the response was YES. [2022-11-25 18:34:47,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155274 conditions, 48814 events. 33813/48814 cut-off events. For 92851/92851 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 317456 event pairs, 10121 based on Foata normal form. 2634/47322 useless extension candidates. Maximal degree in co-relation 155245. Up to 16608 conditions per place. [2022-11-25 18:34:47,284 INFO L137 encePairwiseOnDemand]: 828/833 looper letters, 178 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2022-11-25 18:34:47,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 185 transitions, 1475 flow [2022-11-25 18:34:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:34:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2822 transitions. [2022-11-25 18:34:47,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2022-11-25 18:34:47,290 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2822 transitions. [2022-11-25 18:34:47,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2822 transitions. [2022-11-25 18:34:47,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:47,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2822 transitions. [2022-11-25 18:34:47,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 352.75) internal successors, (2822), 8 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,301 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,302 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 349 flow. Second operand 8 states and 2822 transitions. [2022-11-25 18:34:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 185 transitions, 1475 flow [2022-11-25 18:34:47,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 185 transitions, 1352 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-11-25 18:34:47,419 INFO L231 Difference]: Finished difference. Result has 96 places, 62 transitions, 362 flow [2022-11-25 18:34:47,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=96, PETRI_TRANSITIONS=62} [2022-11-25 18:34:47,419 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2022-11-25 18:34:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 62 transitions, 362 flow [2022-11-25 18:34:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.6) internal successors, (3396), 10 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:47,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:47,421 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:47,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:47,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:47,621 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:34:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1843296218, now seen corresponding path program 1 times [2022-11-25 18:34:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:34:47,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961445586] [2022-11-25 18:34:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:47,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:34:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:34:47,623 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:34:47,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 18:34:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:48,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:34:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:48,327 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:34:48,327 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:34:48,456 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:34:48,456 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:34:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:48,554 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:48,565 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:34:48,566 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:34:48,617 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:34:48,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:34:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:34:51,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:34:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961445586] [2022-11-25 18:34:51,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961445586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:51,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:51,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-25 18:34:51,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215932006] [2022-11-25 18:34:51,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:51,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:34:51,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:34:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:34:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:54,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:57,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:35:01,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 833 [2022-11-25 18:35:01,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 62 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 331.72727272727275) internal successors, (3649), 11 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:01,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:01,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 833 [2022-11-25 18:35:01,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:09,895 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2022-11-25 18:35:09,896 INFO L131 PetriNetUnfolder]: For 62529/62529 co-relation queries the response was YES. [2022-11-25 18:35:10,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129822 conditions, 40090 events. 27723/40090 cut-off events. For 62529/62529 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 254461 event pairs, 8173 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 129794. Up to 13712 conditions per place. [2022-11-25 18:35:10,272 INFO L137 encePairwiseOnDemand]: 827/833 looper letters, 174 selfloop transitions, 8 changer transitions 0/182 dead transitions. [2022-11-25 18:35:10,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 182 transitions, 1362 flow [2022-11-25 18:35:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:35:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:35:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2755 transitions. [2022-11-25 18:35:10,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4134153661464586 [2022-11-25 18:35:10,276 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2755 transitions. [2022-11-25 18:35:10,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2755 transitions. [2022-11-25 18:35:10,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:10,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2755 transitions. [2022-11-25 18:35:10,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 344.375) internal successors, (2755), 8 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:10,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:10,285 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 833.0) internal successors, (7497), 9 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:10,285 INFO L175 Difference]: Start difference. First operand has 96 places, 62 transitions, 362 flow. Second operand 8 states and 2755 transitions. [2022-11-25 18:35:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 182 transitions, 1362 flow [2022-11-25 18:35:10,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 182 transitions, 1351 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 18:35:10,831 INFO L231 Difference]: Finished difference. Result has 103 places, 62 transitions, 380 flow [2022-11-25 18:35:10,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=103, PETRI_TRANSITIONS=62} [2022-11-25 18:35:10,832 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2022-11-25 18:35:10,832 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 62 transitions, 380 flow [2022-11-25 18:35:10,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 331.72727272727275) internal successors, (3649), 11 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:10,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:10,833 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:10,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:11,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:35:11,033 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:35:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:11,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1213448843, now seen corresponding path program 2 times [2022-11-25 18:35:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:35:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601586183] [2022-11-25 18:35:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:35:11,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:35:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:35:11,036 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:35:11,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-25 18:35:11,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:35:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:35:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:11,412 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:35:11,412 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:35:11,543 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:35:11,544 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:35:11,650 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:35:11,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:35:11,680 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:35:11,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 18:35:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:35:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:35:11,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 18:35:11,878 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 18:35:11,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 18:35:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-25 18:35:12,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:35:12,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:35:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601586183] [2022-11-25 18:35:12,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601586183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:35:12,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:35:12,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:35:12,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426876699] [2022-11-25 18:35:12,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:35:12,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:35:12,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:35:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:35:12,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:35:13,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 833 [2022-11-25 18:35:13,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 62 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 333.4) internal successors, (1667), 5 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:13,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:13,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 833 [2022-11-25 18:35:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:20,964 INFO L130 PetriNetUnfolder]: 26479/38340 cut-off events. [2022-11-25 18:35:20,964 INFO L131 PetriNetUnfolder]: For 81569/81569 co-relation queries the response was YES. [2022-11-25 18:35:21,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130519 conditions, 38340 events. 26479/38340 cut-off events. For 81569/81569 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 237199 event pairs, 24525 based on Foata normal form. 0/37734 useless extension candidates. Maximal degree in co-relation 130488. Up to 38328 conditions per place. [2022-11-25 18:35:21,346 INFO L137 encePairwiseOnDemand]: 829/833 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2022-11-25 18:35:21,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 61 transitions, 496 flow [2022-11-25 18:35:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:35:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:35:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1691 transitions. [2022-11-25 18:35:21,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40600240096038415 [2022-11-25 18:35:21,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1691 transitions. [2022-11-25 18:35:21,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1691 transitions. [2022-11-25 18:35:21,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:21,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1691 transitions. [2022-11-25 18:35:21,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:21,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:21,356 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 833.0) internal successors, (4998), 6 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:21,357 INFO L175 Difference]: Start difference. First operand has 103 places, 62 transitions, 380 flow. Second operand 5 states and 1691 transitions. [2022-11-25 18:35:21,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 61 transitions, 496 flow [2022-11-25 18:35:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 61 transitions, 468 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 18:35:21,582 INFO L231 Difference]: Finished difference. Result has 96 places, 61 transitions, 352 flow [2022-11-25 18:35:21,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=833, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=96, PETRI_TRANSITIONS=61} [2022-11-25 18:35:21,583 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2022-11-25 18:35:21,583 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 61 transitions, 352 flow [2022-11-25 18:35:21,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 333.4) internal successors, (1667), 5 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:21,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:21,584 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:21,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-25 18:35:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:35:21,791 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:35:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1213448769, now seen corresponding path program 2 times [2022-11-25 18:35:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:35:21,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300633493] [2022-11-25 18:35:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:35:21,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:35:21,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:35:21,793 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:35:21,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ac1a91-cc27-47a7-9170-1793a90f83f5/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-25 18:35:22,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:35:22,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:35:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:22,419 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:35:22,420 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:35:22,539 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:35:22,539 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:35:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:35:22,624 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:35:22,632 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:35:22,633 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 18:35:22,681 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:35:22,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:35:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:35:22,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:35:26,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:35:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300633493] [2022-11-25 18:35:26,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300633493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:26,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:35:26,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-25 18:35:26,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28696483] [2022-11-25 18:35:26,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:26,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:35:26,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:35:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:35:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:35:37,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:35:45,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 833 [2022-11-25 18:35:45,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 61 transitions, 352 flow. Second operand has 17 states, 17 states have (on average 332.11764705882354) internal successors, (5646), 17 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:45,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:45,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 833 [2022-11-25 18:35:45,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand