./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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 17:50:31,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:50:31,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:50:32,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:50:32,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:50:32,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:50:32,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:50:32,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:50:32,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:50:32,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:50:32,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:50:32,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:50:32,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:50:32,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:50:32,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:50:32,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:50:32,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:50:32,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:50:32,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:50:32,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:50:32,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:50:32,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:50:32,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:50:32,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:50:32,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:50:32,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:50:32,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:50:32,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:50:32,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:50:32,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:50:32,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:50:32,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:50:32,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:50:32,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:50:32,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:50:32,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:50:32,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:50:32,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:50:32,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:50:32,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:50:32,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:50:32,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:50:32,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:50:32,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:50:32,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:50:32,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:50:32,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:50:32,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:50:32,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:50:32,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:50:32,110 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:50:32,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:50:32,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:50:32,111 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:50:32,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:50:32,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:50:32,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:50:32,112 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:50:32,112 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:50:32,112 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:50:32,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:50:32,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:50:32,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:50:32,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:50:32,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:50:32,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:50:32,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:50:32,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:50:32,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:50:32,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:50:32,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:50:32,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:50:32,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:50:32,115 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:50:32,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:50:32,116 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-25 17:50:32,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:50:32,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:50:32,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:50:32,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:50:32,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:50:32,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 17:50:35,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:50:35,692 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:50:35,693 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 17:50:35,702 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/21e127ff0/16df668e77974641a0959f0579c249ce/FLAG4bd467070 [2022-11-25 17:50:35,719 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/21e127ff0/16df668e77974641a0959f0579c249ce [2022-11-25 17:50:35,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:50:35,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:50:35,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:35,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:50:35,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:50:35,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:35" (1/1) ... [2022-11-25 17:50:35,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccdeef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:35, skipping insertion in model container [2022-11-25 17:50:35,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:35" (1/1) ... [2022-11-25 17:50:35,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:50:35,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:50:35,944 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 17:50:35,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:35,975 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 17:50:35,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f5ef5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:35, skipping insertion in model container [2022-11-25 17:50:35,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:35,976 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:50:35,978 INFO L158 Benchmark]: Toolchain (without parser) took 253.89ms. Allocated memory is still 159.4MB. Free memory was 127.4MB in the beginning and 117.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:50:35,979 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 100.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:50:35,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.32ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 117.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 17:50:35,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 100.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.32ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 117.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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 17:50:38,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:50:38,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:50:38,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:50:38,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:50:38,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:50:38,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:50:38,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:50:38,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:50:38,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:50:38,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:50:38,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:50:38,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:50:38,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:50:38,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:50:38,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:50:38,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:50:38,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:50:38,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:50:38,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:50:38,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:50:38,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:50:38,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:50:38,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:50:38,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:50:38,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:50:38,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:50:38,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:50:38,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:50:38,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:50:38,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:50:38,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:50:38,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:50:38,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:50:38,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:50:38,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:50:38,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:50:38,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:50:38,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:50:38,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:50:38,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:50:38,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:50:38,615 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:50:38,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:50:38,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:50:38,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:50:38,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:50:38,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:50:38,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:50:38,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:50:38,619 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:50:38,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:50:38,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:50:38,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:50:38,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:50:38,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:50:38,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:50:38,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:50:38,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:50:38,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:50:38,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:50:38,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:50:38,622 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:50:38,622 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:50:38,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:50:38,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:50:38,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:50:38,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:50:38,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:50:38,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:50:38,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:50:38,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:50:38,625 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:50:38,625 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:50:38,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:50:38,626 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:50:38,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:50:38,626 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:50:38,626 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-25 17:50:39,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:50:39,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:50:39,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:50:39,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:50:39,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:50:39,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 17:50:42,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:50:42,736 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:50:42,737 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 17:50:42,744 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/06b824fcb/d1a8666c7b6149f9b07949c00871e322/FLAG2589da2f0 [2022-11-25 17:50:42,768 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/data/06b824fcb/d1a8666c7b6149f9b07949c00871e322 [2022-11-25 17:50:42,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:50:42,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:50:42,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:42,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:50:42,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:50:42,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:42" (1/1) ... [2022-11-25 17:50:42,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479f78b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:42, skipping insertion in model container [2022-11-25 17:50:42,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:42" (1/1) ... [2022-11-25 17:50:42,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:50:42,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:50:43,047 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 17:50:43,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:43,083 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:50:43,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:50:43,107 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 17:50:43,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:43,130 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:50:43,169 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_d69bf556-d7d7-4e6d-8c57-3865c81b682d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 17:50:43,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:43,205 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:50:43,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43 WrapperNode [2022-11-25 17:50:43,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:43,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:50:43,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:50:43,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:50:43,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,296 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 270 [2022-11-25 17:50:43,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:50:43,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:50:43,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:50:43,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:50:43,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,393 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:50:43,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:50:43,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:50:43,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:50:43,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (1/1) ... [2022-11-25 17:50:43,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:50:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:50:43,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:50:43,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:50:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:50:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-25 17:50:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:50:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:50:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:50:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:50:43,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:50:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:50:43,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:50:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:50:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:50:43,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:50:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-25 17:50:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:50:43,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:50:43,495 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 17:50:43,637 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:50:43,640 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:50:44,828 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:50:44,841 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:50:44,841 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:50:44,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:44 BoogieIcfgContainer [2022-11-25 17:50:44,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:50:44,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:50:44,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:50:44,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:50:44,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:50:42" (1/3) ... [2022-11-25 17:50:44,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ce5d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:44, skipping insertion in model container [2022-11-25 17:50:44,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:43" (2/3) ... [2022-11-25 17:50:44,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ce5d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:44, skipping insertion in model container [2022-11-25 17:50:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:44" (3/3) ... [2022-11-25 17:50:44,854 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-25 17:50:44,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:50:44,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-25 17:50:44,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:50:45,022 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:50:45,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 406 transitions, 828 flow [2022-11-25 17:50:45,253 INFO L130 PetriNetUnfolder]: 28/404 cut-off events. [2022-11-25 17:50:45,254 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:50:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 404 events. 28/404 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 582 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 307. Up to 2 conditions per place. [2022-11-25 17:50:45,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 385 places, 406 transitions, 828 flow [2022-11-25 17:50:45,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 399 transitions, 810 flow [2022-11-25 17:50:45,290 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:50:45,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 399 transitions, 810 flow [2022-11-25 17:50:45,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 399 transitions, 810 flow [2022-11-25 17:50:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 399 transitions, 810 flow [2022-11-25 17:50:45,435 INFO L130 PetriNetUnfolder]: 28/399 cut-off events. [2022-11-25 17:50:45,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:50:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 399 events. 28/399 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 579 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 307. Up to 2 conditions per place. [2022-11-25 17:50:45,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 11440 [2022-11-25 17:51:57,804 INFO L134 LiptonReduction]: Checked pairs total: 14587 [2022-11-25 17:51:57,805 INFO L136 LiptonReduction]: Total number of compositions: 473 [2022-11-25 17:51:57,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:51:57,829 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;@791f83ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:51:57,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2022-11-25 17:51:57,833 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:51:57,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:51:57,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:57,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:51:57,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:51:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 49912, now seen corresponding path program 1 times [2022-11-25 17:51:57,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:51:57,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365427297] [2022-11-25 17:51:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:57,879 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 17:51:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:51:57,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:51:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:51:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:51:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:58,174 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:51:58,175 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:51:58,203 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 17:51:58,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:51:58,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:51:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365427297] [2022-11-25 17:51:58,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365427297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:58,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:58,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:51:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124819689] [2022-11-25 17:51:58,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:58,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:51:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:51:58,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 879 [2022-11-25 17:51:58,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 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 17:51:58,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:58,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 879 [2022-11-25 17:51:58,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:59,552 INFO L130 PetriNetUnfolder]: 1021/1690 cut-off events. [2022-11-25 17:51:59,553 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:51:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3419 conditions, 1690 events. 1021/1690 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 8955 event pairs, 945 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 3244. Up to 1680 conditions per place. [2022-11-25 17:51:59,583 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 55 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2022-11-25 17:51:59,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 244 flow [2022-11-25 17:51:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1176 transitions. [2022-11-25 17:51:59,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459613196814562 [2022-11-25 17:51:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1176 transitions. [2022-11-25 17:51:59,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1176 transitions. [2022-11-25 17:51:59,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:59,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1176 transitions. [2022-11-25 17:51:59,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 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 17:51:59,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:51:59,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:51:59,638 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 3 states and 1176 transitions. [2022-11-25 17:51:59,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 244 flow [2022-11-25 17:51:59,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:51:59,647 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 126 flow [2022-11-25 17:51:59,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, 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=126, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2022-11-25 17:51:59,653 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2022-11-25 17:51:59,654 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 126 flow [2022-11-25 17:51:59,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 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 17:51:59,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:59,655 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:51:59,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:51:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:51:59,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:51:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash 49913, now seen corresponding path program 1 times [2022-11-25 17:51:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:51:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721929407] [2022-11-25 17:51:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:59,871 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 17:51:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:51:59,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:51:59,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:52:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:00,142 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:52:00,143 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:52:00,178 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 17:52:00,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:00,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721929407] [2022-11-25 17:52:00,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721929407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:00,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:00,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:52:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318473680] [2022-11-25 17:52:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:00,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:00,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:00,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 879 [2022-11-25 17:52:00,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 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 17:52:00,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:00,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 879 [2022-11-25 17:52:00,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:01,774 INFO L130 PetriNetUnfolder]: 1023/1694 cut-off events. [2022-11-25 17:52:01,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:52:01,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3400 conditions, 1694 events. 1023/1694 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 8968 event pairs, 945 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 3394. Up to 1682 conditions per place. [2022-11-25 17:52:01,787 INFO L137 encePairwiseOnDemand]: 872/879 looper letters, 55 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2022-11-25 17:52:01,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2022-11-25 17:52:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1169 transitions. [2022-11-25 17:52:01,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4433067880166856 [2022-11-25 17:52:01,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1169 transitions. [2022-11-25 17:52:01,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1169 transitions. [2022-11-25 17:52:01,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:01,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1169 transitions. [2022-11-25 17:52:01,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 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 17:52:01,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:01,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:01,810 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 126 flow. Second operand 3 states and 1169 transitions. [2022-11-25 17:52:01,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2022-11-25 17:52:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:01,814 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 165 flow [2022-11-25 17:52:01,815 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2022-11-25 17:52:01,816 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2022-11-25 17:52:01,817 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 165 flow [2022-11-25 17:52:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 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 17:52:01,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:01,820 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:52:01,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:02,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:02,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1555149, now seen corresponding path program 1 times [2022-11-25 17:52:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198982943] [2022-11-25 17:52:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:02,054 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 17:52:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:02,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:02,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:52:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:02,282 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:52:02,283 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:52:02,479 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 17:52:02,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:02,823 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 17:52:02,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198982943] [2022-11-25 17:52:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198982943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:02,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:02,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:52:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519743304] [2022-11-25 17:52:02,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:52:05,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 879 [2022-11-25 17:52:05,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 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 17:52:05,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:05,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 879 [2022-11-25 17:52:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:07,735 INFO L130 PetriNetUnfolder]: 1029/1706 cut-off events. [2022-11-25 17:52:07,735 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:52:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3456 conditions, 1706 events. 1029/1706 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8869 event pairs, 945 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 3447. Up to 1677 conditions per place. [2022-11-25 17:52:07,747 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2022-11-25 17:52:07,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 363 flow [2022-11-25 17:52:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2232 transitions. [2022-11-25 17:52:07,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4232081911262799 [2022-11-25 17:52:07,756 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2232 transitions. [2022-11-25 17:52:07,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2232 transitions. [2022-11-25 17:52:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2232 transitions. [2022-11-25 17:52:07,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 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 17:52:07,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 879.0) internal successors, (6153), 7 states have internal predecessors, (6153), 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 17:52:07,776 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 879.0) internal successors, (6153), 7 states have internal predecessors, (6153), 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 17:52:07,776 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 165 flow. Second operand 6 states and 2232 transitions. [2022-11-25 17:52:07,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 363 flow [2022-11-25 17:52:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:07,781 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 279 flow [2022-11-25 17:52:07,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2022-11-25 17:52:07,783 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2022-11-25 17:52:07,785 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 279 flow [2022-11-25 17:52:07,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 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 17:52:07,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:07,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:52:07,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:08,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash 48319813, now seen corresponding path program 1 times [2022-11-25 17:52:08,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:08,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340452739] [2022-11-25 17:52:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:08,005 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 17:52:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:08,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:08,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:52:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:08,138 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 17:52:08,164 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 17:52:08,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:08,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340452739] [2022-11-25 17:52:08,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340452739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:08,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:08,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065235176] [2022-11-25 17:52:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:52:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:52:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:52:08,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 879 [2022-11-25 17:52:08,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 17:52:08,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:08,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 879 [2022-11-25 17:52:08,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:09,579 INFO L130 PetriNetUnfolder]: 1030/1709 cut-off events. [2022-11-25 17:52:09,579 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:52:09,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3498 conditions, 1709 events. 1030/1709 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8873 event pairs, 945 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 3486. Up to 1693 conditions per place. [2022-11-25 17:52:09,590 INFO L137 encePairwiseOnDemand]: 874/879 looper letters, 67 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2022-11-25 17:52:09,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 438 flow [2022-11-25 17:52:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:52:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:52:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1528 transitions. [2022-11-25 17:52:09,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43458475540386804 [2022-11-25 17:52:09,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1528 transitions. [2022-11-25 17:52:09,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1528 transitions. [2022-11-25 17:52:09,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:09,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1528 transitions. [2022-11-25 17:52:09,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 17:52:09,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:52:09,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:52:09,621 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 279 flow. Second operand 4 states and 1528 transitions. [2022-11-25 17:52:09,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 438 flow [2022-11-25 17:52:09,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 412 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:09,625 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 289 flow [2022-11-25 17:52:09,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2022-11-25 17:52:09,626 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-11-25 17:52:09,626 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 289 flow [2022-11-25 17:52:09,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 17:52:09,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:09,627 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:52:09,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:09,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 48319812, now seen corresponding path program 1 times [2022-11-25 17:52:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:09,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349654493] [2022-11-25 17:52:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:09,840 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 17:52:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:09,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:09,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:52:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:09,934 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 17:52:09,941 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 17:52:09,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:09,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349654493] [2022-11-25 17:52:09,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349654493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:09,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:09,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:09,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878880711] [2022-11-25 17:52:09,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:09,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:10,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 879 [2022-11-25 17:52:10,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 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 17:52:10,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:10,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 879 [2022-11-25 17:52:10,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:10,899 INFO L130 PetriNetUnfolder]: 1030/1706 cut-off events. [2022-11-25 17:52:10,899 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-25 17:52:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3493 conditions, 1706 events. 1030/1706 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8857 event pairs, 945 based on Foata normal form. 2/511 useless extension candidates. Maximal degree in co-relation 3479. Up to 1678 conditions per place. [2022-11-25 17:52:10,910 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 67 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-25 17:52:10,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 429 flow [2022-11-25 17:52:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1169 transitions. [2022-11-25 17:52:10,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4433067880166856 [2022-11-25 17:52:10,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1169 transitions. [2022-11-25 17:52:10,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1169 transitions. [2022-11-25 17:52:10,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:10,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1169 transitions. [2022-11-25 17:52:10,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 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 17:52:10,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:10,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:10,939 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 289 flow. Second operand 3 states and 1169 transitions. [2022-11-25 17:52:10,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 429 flow [2022-11-25 17:52:10,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 418 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:10,943 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 284 flow [2022-11-25 17:52:10,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2022-11-25 17:52:10,944 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2022-11-25 17:52:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 284 flow [2022-11-25 17:52:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 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 17:52:10,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:10,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:52:10,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:11,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:11,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1497926065, now seen corresponding path program 1 times [2022-11-25 17:52:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:11,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448091903] [2022-11-25 17:52:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:11,165 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 17:52:11,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:11,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:11,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:52:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:11,321 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 17:52:11,394 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 17:52:11,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:11,730 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 17:52:11,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448091903] [2022-11-25 17:52:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448091903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:11,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:11,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:52:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138388051] [2022-11-25 17:52:11,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:15,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 879 [2022-11-25 17:52:15,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 358.42857142857144) internal successors, (2509), 7 states have internal predecessors, (2509), 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 17:52:15,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:15,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 879 [2022-11-25 17:52:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:17,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:18,487 INFO L130 PetriNetUnfolder]: 1039/1720 cut-off events. [2022-11-25 17:52:18,487 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-25 17:52:18,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3534 conditions, 1720 events. 1039/1720 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 8934 event pairs, 945 based on Foata normal form. 0/517 useless extension candidates. Maximal degree in co-relation 3521. Up to 1678 conditions per place. [2022-11-25 17:52:18,503 INFO L137 encePairwiseOnDemand]: 869/879 looper letters, 64 selfloop transitions, 22 changer transitions 0/90 dead transitions. [2022-11-25 17:52:18,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 90 transitions, 505 flow [2022-11-25 17:52:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:52:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:52:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2574 transitions. [2022-11-25 17:52:18,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183325207215992 [2022-11-25 17:52:18,511 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2574 transitions. [2022-11-25 17:52:18,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2574 transitions. [2022-11-25 17:52:18,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:18,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2574 transitions. [2022-11-25 17:52:18,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 367.7142857142857) internal successors, (2574), 7 states have internal predecessors, (2574), 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 17:52:18,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 879.0) internal successors, (7032), 8 states have internal predecessors, (7032), 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 17:52:18,529 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 879.0) internal successors, (7032), 8 states have internal predecessors, (7032), 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 17:52:18,529 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 284 flow. Second operand 7 states and 2574 transitions. [2022-11-25 17:52:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 90 transitions, 505 flow [2022-11-25 17:52:18,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:18,533 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 418 flow [2022-11-25 17:52:18,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2022-11-25 17:52:18,534 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 9 predicate places. [2022-11-25 17:52:18,534 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 418 flow [2022-11-25 17:52:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 358.42857142857144) internal successors, (2509), 7 states have internal predecessors, (2509), 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 17:52:18,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:18,535 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:52:18,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:18,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:18,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash -808814014, now seen corresponding path program 1 times [2022-11-25 17:52:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424940379] [2022-11-25 17:52:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:18,750 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 17:52:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:18,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:18,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:18,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:18,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:18,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:18,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424940379] [2022-11-25 17:52:18,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424940379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:18,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:18,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:18,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210011287] [2022-11-25 17:52:18,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:18,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:19,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 879 [2022-11-25 17:52:19,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 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 17:52:19,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:19,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 879 [2022-11-25 17:52:19,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:19,840 INFO L130 PetriNetUnfolder]: 1038/1719 cut-off events. [2022-11-25 17:52:19,840 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-25 17:52:19,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3577 conditions, 1719 events. 1038/1719 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 8934 event pairs, 945 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 3560. Up to 1709 conditions per place. [2022-11-25 17:52:19,850 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 83 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-11-25 17:52:19,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 584 flow [2022-11-25 17:52:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1175 transitions. [2022-11-25 17:52:19,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44558210087220324 [2022-11-25 17:52:19,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1175 transitions. [2022-11-25 17:52:19,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1175 transitions. [2022-11-25 17:52:19,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:19,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1175 transitions. [2022-11-25 17:52:19,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 391.6666666666667) internal successors, (1175), 3 states have internal predecessors, (1175), 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 17:52:19,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:19,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:52:19,863 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 418 flow. Second operand 3 states and 1175 transitions. [2022-11-25 17:52:19,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 584 flow [2022-11-25 17:52:19,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 562 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:19,867 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 396 flow [2022-11-25 17:52:19,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2022-11-25 17:52:19,868 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 9 predicate places. [2022-11-25 17:52:19,868 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 396 flow [2022-11-25 17:52:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 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 17:52:19,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:19,869 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:52:19,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Ended with exit code 0 [2022-11-25 17:52:20,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:20,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash -907405319, now seen corresponding path program 2 times [2022-11-25 17:52:20,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:20,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584596135] [2022-11-25 17:52:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:20,082 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 17:52:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:20,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:20,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:20,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:20,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:20,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:52:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:20,255 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:52:20,256 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:52:20,428 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 17:52:20,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:21,162 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 17:52:21,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:21,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584596135] [2022-11-25 17:52:21,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584596135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:21,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:21,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:52:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053946485] [2022-11-25 17:52:21,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:21,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:52:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:52:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:52:30,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 879 [2022-11-25 17:52:30,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 396 flow. Second operand has 12 states, 12 states have (on average 362.0) internal successors, (4344), 12 states have internal predecessors, (4344), 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 17:52:30,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:30,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 879 [2022-11-25 17:52:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:34,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:37,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:38,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:41,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:43,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:46,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:52:47,679 INFO L130 PetriNetUnfolder]: 1055/1754 cut-off events. [2022-11-25 17:52:47,679 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-25 17:52:47,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3722 conditions, 1754 events. 1055/1754 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 9154 event pairs, 945 based on Foata normal form. 12/562 useless extension candidates. Maximal degree in co-relation 3704. Up to 1693 conditions per place. [2022-11-25 17:52:47,685 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 69 selfloop transitions, 51 changer transitions 0/124 dead transitions. [2022-11-25 17:52:47,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 883 flow [2022-11-25 17:52:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:52:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:52:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4440 transitions. [2022-11-25 17:52:47,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42093287827076226 [2022-11-25 17:52:47,696 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4440 transitions. [2022-11-25 17:52:47,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4440 transitions. [2022-11-25 17:52:47,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:47,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4440 transitions. [2022-11-25 17:52:47,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 370.0) internal successors, (4440), 12 states have internal predecessors, (4440), 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 17:52:47,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 879.0) internal successors, (11427), 13 states have internal predecessors, (11427), 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 17:52:47,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 879.0) internal successors, (11427), 13 states have internal predecessors, (11427), 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 17:52:47,725 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 396 flow. Second operand 12 states and 4440 transitions. [2022-11-25 17:52:47,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 883 flow [2022-11-25 17:52:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 879 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:47,730 INFO L231 Difference]: Finished difference. Result has 93 places, 118 transitions, 791 flow [2022-11-25 17:52:47,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=791, PETRI_PLACES=93, PETRI_TRANSITIONS=118} [2022-11-25 17:52:47,731 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 25 predicate places. [2022-11-25 17:52:47,731 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 118 transitions, 791 flow [2022-11-25 17:52:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 362.0) internal successors, (4344), 12 states have internal predecessors, (4344), 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 17:52:47,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:47,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:52:47,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Ended with exit code 0 [2022-11-25 17:52:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:47,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -904224729, now seen corresponding path program 1 times [2022-11-25 17:52:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923960752] [2022-11-25 17:52:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:47,945 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 17:52:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:47,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:47,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:52:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:48,219 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 17:52:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:48,378 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 17:52:48,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923960752] [2022-11-25 17:52:48,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923960752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:48,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:48,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 17:52:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971070911] [2022-11-25 17:52:48,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:52:48,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:52:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:52:50,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 879 [2022-11-25 17:52:50,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 791 flow. Second operand has 10 states, 10 states have (on average 356.1) internal successors, (3561), 10 states have internal predecessors, (3561), 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 17:52:50,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:50,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 879 [2022-11-25 17:52:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:52,363 INFO L130 PetriNetUnfolder]: 2095/3481 cut-off events. [2022-11-25 17:52:52,364 INFO L131 PetriNetUnfolder]: For 281/281 co-relation queries the response was YES. [2022-11-25 17:52:52,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7472 conditions, 3481 events. 2095/3481 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 20862 event pairs, 1890 based on Foata normal form. 4/1089 useless extension candidates. Maximal degree in co-relation 7447. Up to 1725 conditions per place. [2022-11-25 17:52:52,384 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 169 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2022-11-25 17:52:52,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 205 transitions, 1719 flow [2022-11-25 17:52:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:52:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:52:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3306 transitions. [2022-11-25 17:52:52,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4178991277967387 [2022-11-25 17:52:52,392 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3306 transitions. [2022-11-25 17:52:52,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3306 transitions. [2022-11-25 17:52:52,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:52,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3306 transitions. [2022-11-25 17:52:52,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 367.3333333333333) internal successors, (3306), 9 states have internal predecessors, (3306), 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 17:52:52,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 879.0) internal successors, (8790), 10 states have internal predecessors, (8790), 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 17:52:52,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 879.0) internal successors, (8790), 10 states have internal predecessors, (8790), 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 17:52:52,412 INFO L175 Difference]: Start difference. First operand has 93 places, 118 transitions, 791 flow. Second operand 9 states and 3306 transitions. [2022-11-25 17:52:52,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 205 transitions, 1719 flow [2022-11-25 17:52:52,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 205 transitions, 1548 flow, removed 47 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:52,421 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 869 flow [2022-11-25 17:52:52,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=869, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2022-11-25 17:52:52,422 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2022-11-25 17:52:52,422 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 869 flow [2022-11-25 17:52:52,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 356.1) internal successors, (3561), 10 states have internal predecessors, (3561), 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 17:52:52,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:52,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:52,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:52,641 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2033702755, now seen corresponding path program 1 times [2022-11-25 17:52:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:52,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526365763] [2022-11-25 17:52:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:52,642 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 17:52:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:52,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:52,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:52:52,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:52,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526365763] [2022-11-25 17:52:52,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526365763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:52,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:52,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:52:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905199597] [2022-11-25 17:52:52,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:52:52,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:52:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:52:53,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 879 [2022-11-25 17:52:53,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 869 flow. Second operand has 4 states, 4 states have (on average 372.75) internal successors, (1491), 4 states have internal predecessors, (1491), 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 17:52:53,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:53,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 879 [2022-11-25 17:52:53,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:54,342 INFO L130 PetriNetUnfolder]: 2093/3479 cut-off events. [2022-11-25 17:52:54,342 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2022-11-25 17:52:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 3479 events. 2093/3479 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 20800 event pairs, 1890 based on Foata normal form. 2/1087 useless extension candidates. Maximal degree in co-relation 7382. Up to 3448 conditions per place. [2022-11-25 17:52:54,359 INFO L137 encePairwiseOnDemand]: 874/879 looper letters, 111 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2022-11-25 17:52:54,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 1091 flow [2022-11-25 17:52:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:52:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:52:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1541 transitions. [2022-11-25 17:52:54,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382821387940842 [2022-11-25 17:52:54,364 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1541 transitions. [2022-11-25 17:52:54,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1541 transitions. [2022-11-25 17:52:54,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:54,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1541 transitions. [2022-11-25 17:52:54,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 385.25) internal successors, (1541), 4 states have internal predecessors, (1541), 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 17:52:54,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:52:54,375 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:52:54,375 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 869 flow. Second operand 4 states and 1541 transitions. [2022-11-25 17:52:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 1091 flow [2022-11-25 17:52:54,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 128 transitions, 1086 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:54,382 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 864 flow [2022-11-25 17:52:54,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=864, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2022-11-25 17:52:54,383 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2022-11-25 17:52:54,383 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 864 flow [2022-11-25 17:52:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 372.75) internal successors, (1491), 4 states have internal predecessors, (1491), 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 17:52:54,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:54,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:54,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:54,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:54,600 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1518562438, now seen corresponding path program 1 times [2022-11-25 17:52:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:54,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297423402] [2022-11-25 17:52:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:54,601 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 17:52:54,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:54,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:54,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:52:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:52:54,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:52:55,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:52:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297423402] [2022-11-25 17:52:55,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297423402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:55,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:55,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-25 17:52:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374475406] [2022-11-25 17:52:55,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:52:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:52:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:52:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:52:57,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 879 [2022-11-25 17:52:57,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 864 flow. Second operand has 11 states, 11 states have (on average 356.45454545454544) internal successors, (3921), 11 states have internal predecessors, (3921), 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 17:52:57,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:57,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 879 [2022-11-25 17:52:57,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:59,665 INFO L130 PetriNetUnfolder]: 4135/6859 cut-off events. [2022-11-25 17:52:59,665 INFO L131 PetriNetUnfolder]: For 433/433 co-relation queries the response was YES. [2022-11-25 17:52:59,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14298 conditions, 6859 events. 4135/6859 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 45648 event pairs, 3780 based on Foata normal form. 4/2083 useless extension candidates. Maximal degree in co-relation 14272. Up to 3417 conditions per place. [2022-11-25 17:52:59,706 INFO L137 encePairwiseOnDemand]: 868/879 looper letters, 146 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2022-11-25 17:52:59,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1464 flow [2022-11-25 17:52:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:52:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:52:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3307 transitions. [2022-11-25 17:52:59,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4180255340664897 [2022-11-25 17:52:59,716 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3307 transitions. [2022-11-25 17:52:59,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3307 transitions. [2022-11-25 17:52:59,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:59,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3307 transitions. [2022-11-25 17:52:59,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 367.44444444444446) internal successors, (3307), 9 states have internal predecessors, (3307), 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 17:52:59,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 879.0) internal successors, (8790), 10 states have internal predecessors, (8790), 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 17:52:59,738 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 879.0) internal successors, (8790), 10 states have internal predecessors, (8790), 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 17:52:59,738 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 864 flow. Second operand 9 states and 3307 transitions. [2022-11-25 17:52:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1464 flow [2022-11-25 17:52:59,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 187 transitions, 1450 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:59,749 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1001 flow [2022-11-25 17:52:59,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1001, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2022-11-25 17:52:59,750 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-11-25 17:52:59,750 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1001 flow [2022-11-25 17:52:59,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 356.45454545454544) internal successors, (3921), 11 states have internal predecessors, (3921), 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 17:52:59,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:59,752 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:59,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:59,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:59,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:52:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 950403352, now seen corresponding path program 1 times [2022-11-25 17:52:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:52:59,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162163987] [2022-11-25 17:52:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:59,966 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 17:52:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:52:59,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:52:59,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:53:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:53:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:53:00,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162163987] [2022-11-25 17:53:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162163987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:00,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:00,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-25 17:53:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023586498] [2022-11-25 17:53:00,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:53:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:53:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:53:04,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 879 [2022-11-25 17:53:04,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1001 flow. Second operand has 14 states, 14 states have (on average 356.42857142857144) internal successors, (4990), 14 states have internal predecessors, (4990), 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 17:53:04,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:04,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 879 [2022-11-25 17:53:04,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:07,853 INFO L130 PetriNetUnfolder]: 4127/6847 cut-off events. [2022-11-25 17:53:07,853 INFO L131 PetriNetUnfolder]: For 537/537 co-relation queries the response was YES. [2022-11-25 17:53:07,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14298 conditions, 6847 events. 4127/6847 cut-off events. For 537/537 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 45906 event pairs, 3780 based on Foata normal form. 2/2073 useless extension candidates. Maximal degree in co-relation 14272. Up to 3338 conditions per place. [2022-11-25 17:53:07,888 INFO L137 encePairwiseOnDemand]: 865/879 looper letters, 132 selfloop transitions, 44 changer transitions 0/180 dead transitions. [2022-11-25 17:53:07,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 1466 flow [2022-11-25 17:53:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:53:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:53:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4366 transitions. [2022-11-25 17:53:07,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4139173302995829 [2022-11-25 17:53:07,898 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4366 transitions. [2022-11-25 17:53:07,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4366 transitions. [2022-11-25 17:53:07,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:07,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4366 transitions. [2022-11-25 17:53:07,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 363.8333333333333) internal successors, (4366), 12 states have internal predecessors, (4366), 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 17:53:07,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 879.0) internal successors, (11427), 13 states have internal predecessors, (11427), 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 17:53:07,919 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 879.0) internal successors, (11427), 13 states have internal predecessors, (11427), 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 17:53:07,920 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1001 flow. Second operand 12 states and 4366 transitions. [2022-11-25 17:53:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 1466 flow [2022-11-25 17:53:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 180 transitions, 1439 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 17:53:07,929 INFO L231 Difference]: Finished difference. Result has 114 places, 135 transitions, 1102 flow [2022-11-25 17:53:07,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1102, PETRI_PLACES=114, PETRI_TRANSITIONS=135} [2022-11-25 17:53:07,930 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2022-11-25 17:53:07,930 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 135 transitions, 1102 flow [2022-11-25 17:53:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 356.42857142857144) internal successors, (4990), 14 states have internal predecessors, (4990), 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 17:53:07,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:07,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:07,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:08,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 169205477, now seen corresponding path program 2 times [2022-11-25 17:53:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813996918] [2022-11-25 17:53:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:08,144 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 17:53:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:08,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:08,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:53:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:53:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,369 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:53:08,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:53:08,385 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 10 treesize of output 8 [2022-11-25 17:53:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,442 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 17:53:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,498 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 17:53:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,538 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 17:53:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:53:08,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:08,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:08,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813996918] [2022-11-25 17:53:08,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813996918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:08,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:08,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:53:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747967150] [2022-11-25 17:53:08,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:08,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:08,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:09,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 879 [2022-11-25 17:53:09,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 135 transitions, 1102 flow. Second operand has 4 states, 4 states have (on average 374.25) internal successors, (1497), 4 states have internal predecessors, (1497), 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 17:53:09,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:09,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 879 [2022-11-25 17:53:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:10,674 INFO L130 PetriNetUnfolder]: 3073/5245 cut-off events. [2022-11-25 17:53:10,674 INFO L131 PetriNetUnfolder]: For 739/739 co-relation queries the response was YES. [2022-11-25 17:53:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11180 conditions, 5245 events. 3073/5245 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 34485 event pairs, 2792 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 11152. Up to 5205 conditions per place. [2022-11-25 17:53:10,703 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 126 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2022-11-25 17:53:10,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 131 transitions, 1329 flow [2022-11-25 17:53:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1170 transitions. [2022-11-25 17:53:10,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44368600682593856 [2022-11-25 17:53:10,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1170 transitions. [2022-11-25 17:53:10,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1170 transitions. [2022-11-25 17:53:10,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:10,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1170 transitions. [2022-11-25 17:53:10,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 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 17:53:10,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:10,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:10,714 INFO L175 Difference]: Start difference. First operand has 114 places, 135 transitions, 1102 flow. Second operand 3 states and 1170 transitions. [2022-11-25 17:53:10,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 131 transitions, 1329 flow [2022-11-25 17:53:10,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 131 transitions, 1245 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-25 17:53:10,722 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 993 flow [2022-11-25 17:53:10,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=993, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2022-11-25 17:53:10,723 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2022-11-25 17:53:10,724 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 993 flow [2022-11-25 17:53:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 374.25) internal successors, (1497), 4 states have internal predecessors, (1497), 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 17:53:10,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:10,724 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:10,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:10,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:10,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 169205479, now seen corresponding path program 1 times [2022-11-25 17:53:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505364409] [2022-11-25 17:53:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:10,936 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 17:53:10,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:10,939 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:10,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:53:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:11,199 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 17:53:11,199 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 17:53:11,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:11,260 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 17:53:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:11,327 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 17:53:11,388 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:53:11,389 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 17:53:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:53:11,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:11,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505364409] [2022-11-25 17:53:11,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505364409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:11,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:11,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:53:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719536247] [2022-11-25 17:53:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:11,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 879 [2022-11-25 17:53:11,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 993 flow. Second operand has 4 states, 4 states have (on average 376.25) internal successors, (1505), 4 states have internal predecessors, (1505), 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 17:53:11,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:11,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 879 [2022-11-25 17:53:11,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:12,973 INFO L130 PetriNetUnfolder]: 2019/3643 cut-off events. [2022-11-25 17:53:12,974 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2022-11-25 17:53:13,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7899 conditions, 3643 events. 2019/3643 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23680 event pairs, 1804 based on Foata normal form. 0/1551 useless extension candidates. Maximal degree in co-relation 7872. Up to 3603 conditions per place. [2022-11-25 17:53:13,025 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 122 selfloop transitions, 1 changer transitions 0/127 dead transitions. [2022-11-25 17:53:13,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 1212 flow [2022-11-25 17:53:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1174 transitions. [2022-11-25 17:53:13,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44520288206295033 [2022-11-25 17:53:13,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1174 transitions. [2022-11-25 17:53:13,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1174 transitions. [2022-11-25 17:53:13,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:13,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1174 transitions. [2022-11-25 17:53:13,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 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 17:53:13,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:13,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:13,036 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 993 flow. Second operand 3 states and 1174 transitions. [2022-11-25 17:53:13,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 1212 flow [2022-11-25 17:53:13,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 127 transitions, 1211 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:13,044 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 967 flow [2022-11-25 17:53:13,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=967, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2022-11-25 17:53:13,045 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-11-25 17:53:13,045 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 967 flow [2022-11-25 17:53:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 376.25) internal successors, (1505), 4 states have internal predecessors, (1505), 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 17:53:13,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:13,046 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:13,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Ended with exit code 0 [2022-11-25 17:53:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:13,258 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash 947117038, now seen corresponding path program 1 times [2022-11-25 17:53:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:13,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451623421] [2022-11-25 17:53:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:13,259 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 17:53:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:13,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:13,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:53:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:13,411 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 17:53:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:53:13,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:53:14,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451623421] [2022-11-25 17:53:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451623421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:14,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:14,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-25 17:53:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143404815] [2022-11-25 17:53:14,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:53:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:53:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:53:26,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 879 [2022-11-25 17:53:26,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 967 flow. Second operand has 13 states, 13 states have (on average 360.53846153846155) internal successors, (4687), 13 states have internal predecessors, (4687), 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 17:53:26,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:26,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 879 [2022-11-25 17:53:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:29,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:31,205 WARN L539 Checker$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 17:53:33,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:53:35,209 WARN L539 Checker$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 17:53:38,629 INFO L130 PetriNetUnfolder]: 2055/3715 cut-off events. [2022-11-25 17:53:38,629 INFO L131 PetriNetUnfolder]: For 1037/1037 co-relation queries the response was YES. [2022-11-25 17:53:38,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 3715 events. 2055/3715 cut-off events. For 1037/1037 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24238 event pairs, 1804 based on Foata normal form. 36/1659 useless extension candidates. Maximal degree in co-relation 8364. Up to 3472 conditions per place. [2022-11-25 17:53:38,649 INFO L137 encePairwiseOnDemand]: 872/879 looper letters, 83 selfloop transitions, 64 changer transitions 0/151 dead transitions. [2022-11-25 17:53:38,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 151 transitions, 1561 flow [2022-11-25 17:53:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:53:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:53:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4743 transitions. [2022-11-25 17:53:38,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4150695720661591 [2022-11-25 17:53:38,659 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4743 transitions. [2022-11-25 17:53:38,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4743 transitions. [2022-11-25 17:53:38,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:38,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4743 transitions. [2022-11-25 17:53:38,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 364.84615384615387) internal successors, (4743), 13 states have internal predecessors, (4743), 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 17:53:38,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 879.0) internal successors, (12306), 14 states have internal predecessors, (12306), 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 17:53:38,681 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 879.0) internal successors, (12306), 14 states have internal predecessors, (12306), 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 17:53:38,681 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 967 flow. Second operand 13 states and 4743 transitions. [2022-11-25 17:53:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 151 transitions, 1561 flow [2022-11-25 17:53:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1560 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:38,691 INFO L231 Difference]: Finished difference. Result has 121 places, 151 transitions, 1509 flow [2022-11-25 17:53:38,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1509, PETRI_PLACES=121, PETRI_TRANSITIONS=151} [2022-11-25 17:53:38,692 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2022-11-25 17:53:38,692 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 151 transitions, 1509 flow [2022-11-25 17:53:38,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 360.53846153846155) internal successors, (4687), 13 states have internal predecessors, (4687), 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 17:53:38,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:38,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:38,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:38,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:38,905 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash -602258545, now seen corresponding path program 1 times [2022-11-25 17:53:38,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:38,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51568443] [2022-11-25 17:53:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:38,906 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 17:53:38,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:38,907 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:38,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:53:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:39,181 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-25 17:53:39,181 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-25 17:53:39,196 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 26 treesize of output 24 [2022-11-25 17:53:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:39,267 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 17:53:39,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:39,321 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 17:53:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:39,362 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 17:53:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:53:39,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:39,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51568443] [2022-11-25 17:53:39,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51568443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:39,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:39,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:39,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735181141] [2022-11-25 17:53:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:39,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:39,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:39,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:40,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 879 [2022-11-25 17:53:40,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 151 transitions, 1509 flow. Second operand has 5 states, 5 states have (on average 372.2) internal successors, (1861), 5 states have internal predecessors, (1861), 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 17:53:40,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:40,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 879 [2022-11-25 17:53:40,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:40,951 INFO L130 PetriNetUnfolder]: 1955/3515 cut-off events. [2022-11-25 17:53:40,951 INFO L131 PetriNetUnfolder]: For 1163/1163 co-relation queries the response was YES. [2022-11-25 17:53:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 3515 events. 1955/3515 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 22671 event pairs, 1712 based on Foata normal form. 0/1595 useless extension candidates. Maximal degree in co-relation 8226. Up to 3475 conditions per place. [2022-11-25 17:53:40,969 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 144 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2022-11-25 17:53:40,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 149 transitions, 1795 flow [2022-11-25 17:53:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2022-11-25 17:53:40,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43989381873340916 [2022-11-25 17:53:40,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2022-11-25 17:53:40,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2022-11-25 17:53:40,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:40,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2022-11-25 17:53:40,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 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 17:53:40,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:40,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:40,977 INFO L175 Difference]: Start difference. First operand has 121 places, 151 transitions, 1509 flow. Second operand 3 states and 1160 transitions. [2022-11-25 17:53:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 149 transitions, 1795 flow [2022-11-25 17:53:40,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 149 transitions, 1692 flow, removed 37 selfloop flow, removed 3 redundant places. [2022-11-25 17:53:40,985 INFO L231 Difference]: Finished difference. Result has 118 places, 149 transitions, 1404 flow [2022-11-25 17:53:40,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1404, PETRI_PLACES=118, PETRI_TRANSITIONS=149} [2022-11-25 17:53:40,986 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-11-25 17:53:40,986 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 149 transitions, 1404 flow [2022-11-25 17:53:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 372.2) internal successors, (1861), 5 states have internal predecessors, (1861), 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 17:53:40,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:40,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:40,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:41,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -602258544, now seen corresponding path program 1 times [2022-11-25 17:53:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613409968] [2022-11-25 17:53:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,189 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 17:53:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:41,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:41,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:53:41,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:41,471 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 17:53:41,472 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 17:53:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:41,536 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 17:53:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:41,603 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 17:53:41,662 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:53:41,663 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 17:53:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:53:41,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:41,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:41,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613409968] [2022-11-25 17:53:41,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613409968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:41,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:41,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221149788] [2022-11-25 17:53:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:41,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:41,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:42,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 879 [2022-11-25 17:53:42,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 149 transitions, 1404 flow. Second operand has 5 states, 5 states have (on average 371.2) internal successors, (1856), 5 states have internal predecessors, (1856), 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 17:53:42,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:42,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 879 [2022-11-25 17:53:42,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:43,417 INFO L130 PetriNetUnfolder]: 1855/3315 cut-off events. [2022-11-25 17:53:43,417 INFO L131 PetriNetUnfolder]: For 1481/1481 co-relation queries the response was YES. [2022-11-25 17:53:43,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7698 conditions, 3315 events. 1855/3315 cut-off events. For 1481/1481 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 21108 event pairs, 1620 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 7662. Up to 3275 conditions per place. [2022-11-25 17:53:43,429 INFO L137 encePairwiseOnDemand]: 876/879 looper letters, 142 selfloop transitions, 1 changer transitions 0/147 dead transitions. [2022-11-25 17:53:43,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 147 transitions, 1686 flow [2022-11-25 17:53:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1155 transitions. [2022-11-25 17:53:43,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4379977246871445 [2022-11-25 17:53:43,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1155 transitions. [2022-11-25 17:53:43,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1155 transitions. [2022-11-25 17:53:43,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:43,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1155 transitions. [2022-11-25 17:53:43,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 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 17:53:43,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:43,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 879.0) internal successors, (3516), 4 states have internal predecessors, (3516), 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 17:53:43,436 INFO L175 Difference]: Start difference. First operand has 118 places, 149 transitions, 1404 flow. Second operand 3 states and 1155 transitions. [2022-11-25 17:53:43,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 147 transitions, 1686 flow [2022-11-25 17:53:43,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 147 transitions, 1685 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:43,447 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1401 flow [2022-11-25 17:53:43,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1401, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2022-11-25 17:53:43,448 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 49 predicate places. [2022-11-25 17:53:43,448 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1401 flow [2022-11-25 17:53:43,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 371.2) internal successors, (1856), 5 states have internal predecessors, (1856), 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 17:53:43,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:43,449 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:43,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:43,662 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:53:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash -602259003, now seen corresponding path program 1 times [2022-11-25 17:53:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:53:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931263826] [2022-11-25 17:53:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:43,663 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 17:53:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:53:43,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:43,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:53:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:53:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:44,019 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:53:44,019 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:53:44,100 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:53:44,101 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 17:53:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:44,264 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 16 treesize of output 18 [2022-11-25 17:53:44,302 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:53:44,303 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 17:53:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:44,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:53:44,496 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 17:53:44,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 17:53:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:44,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:53:44,778 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-25 17:53:44,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-25 17:53:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:53,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:53:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931263826] [2022-11-25 17:53:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931263826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:53,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:53,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:53:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531172585] [2022-11-25 17:53:53,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:53:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:53:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:53:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=95, Unknown=1, NotChecked=0, Total=132 [2022-11-25 17:53:55,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:57,502 WARN L539 Checker$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 17:53:59,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:01,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:54:04,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:06,344 WARN L539 Checker$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 17:54:08,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:10,647 WARN L539 Checker$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 17:54:12,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:15,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:17,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:54:19,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:21,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:24,051 WARN L539 Checker$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 17:54:26,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:54:28,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:30,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:54:32,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:35,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:37,460 WARN L539 Checker$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 17:54:39,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:41,759 WARN L539 Checker$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 17:54:43,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:54:46,335 WARN L539 Checker$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 17:54:48,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:51,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:53,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:55,397 WARN L539 Checker$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 17:54:57,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:00,043 WARN L539 Checker$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 17:55:02,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:05,036 WARN L539 Checker$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 17:55:07,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:09,677 WARN L539 Checker$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 17:55:12,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:14,360 WARN L539 Checker$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 17:55:16,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:19,164 WARN L539 Checker$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 17:55:21,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:23,690 WARN L539 Checker$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 17:55:27,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:29,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:31,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:33,935 WARN L539 Checker$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 17:55:36,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:38,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:40,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:41,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 879 [2022-11-25 17:55:41,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1401 flow. Second operand has 12 states, 12 states have (on average 277.8333333333333) internal successors, (3334), 12 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:41,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:41,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 879 [2022-11-25 17:55:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:50,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:55:52,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:55:54,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:56,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:58,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:01,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:03,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:04,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:07,087 WARN L539 Checker$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 17:56:16,218 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:56:18,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:56:20,388 WARN L539 Checker$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 17:56:22,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:34,569 WARN L539 Checker$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 17:56:54,031 WARN L233 SmtUtils]: Spent 11.26s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:56:55,255 INFO L130 PetriNetUnfolder]: 1931/3495 cut-off events. [2022-11-25 17:56:55,255 INFO L131 PetriNetUnfolder]: For 2188/2188 co-relation queries the response was YES. [2022-11-25 17:56:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8567 conditions, 3495 events. 1931/3495 cut-off events. For 2188/2188 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 22434 event pairs, 1540 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 8530. Up to 1720 conditions per place. [2022-11-25 17:56:55,270 INFO L137 encePairwiseOnDemand]: 857/879 looper letters, 181 selfloop transitions, 141 changer transitions 0/322 dead transitions. [2022-11-25 17:56:55,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 322 transitions, 3747 flow [2022-11-25 17:56:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:56:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:56:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4547 transitions. [2022-11-25 17:56:55,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3233077360637088 [2022-11-25 17:56:55,278 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4547 transitions. [2022-11-25 17:56:55,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4547 transitions. [2022-11-25 17:56:55,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:55,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4547 transitions. [2022-11-25 17:56:55,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 284.1875) internal successors, (4547), 16 states have internal predecessors, (4547), 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 17:56:55,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 879.0) internal successors, (14943), 17 states have internal predecessors, (14943), 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 17:56:55,302 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 879.0) internal successors, (14943), 17 states have internal predecessors, (14943), 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 17:56:55,302 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1401 flow. Second operand 16 states and 4547 transitions. [2022-11-25 17:56:55,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 322 transitions, 3747 flow [2022-11-25 17:56:55,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 322 transitions, 3746 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:56:55,321 INFO L231 Difference]: Finished difference. Result has 133 places, 226 transitions, 3011 flow [2022-11-25 17:56:55,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3011, PETRI_PLACES=133, PETRI_TRANSITIONS=226} [2022-11-25 17:56:55,321 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2022-11-25 17:56:55,322 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 226 transitions, 3011 flow [2022-11-25 17:56:55,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 277.8333333333333) internal successors, (3334), 12 states have internal predecessors, (3334), 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 17:56:55,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:55,322 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:55,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:55,536 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:56:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -602258588, now seen corresponding path program 1 times [2022-11-25 17:56:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:56:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8779858] [2022-11-25 17:56:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:55,536 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 17:56:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:56:55,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:55,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:56:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:55,741 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 17:56:55,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:56:55,787 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 17:56:55,828 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:56:55,828 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 17:56:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:56:55,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:56:55,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:56:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8779858] [2022-11-25 17:56:55,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8779858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:56:55,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:56:55,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:56:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961966055] [2022-11-25 17:56:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:56:55,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:56:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:56:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:56:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:56:56,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 879 [2022-11-25 17:56:56,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 226 transitions, 3011 flow. Second operand has 4 states, 4 states have (on average 363.75) internal successors, (1455), 4 states have internal predecessors, (1455), 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 17:56:56,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:56,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 879 [2022-11-25 17:56:56,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:57,505 INFO L130 PetriNetUnfolder]: 1307/2465 cut-off events. [2022-11-25 17:56:57,505 INFO L131 PetriNetUnfolder]: For 3596/3628 co-relation queries the response was YES. [2022-11-25 17:56:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 2465 events. 1307/2465 cut-off events. For 3596/3628 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 15505 event pairs, 1012 based on Foata normal form. 116/1527 useless extension candidates. Maximal degree in co-relation 7515. Up to 2372 conditions per place. [2022-11-25 17:56:57,520 INFO L137 encePairwiseOnDemand]: 874/879 looper letters, 188 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2022-11-25 17:56:57,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 222 transitions, 3435 flow [2022-11-25 17:56:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:56:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:56:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1489 transitions. [2022-11-25 17:56:57,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4234926052332196 [2022-11-25 17:56:57,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1489 transitions. [2022-11-25 17:56:57,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1489 transitions. [2022-11-25 17:56:57,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:57,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1489 transitions. [2022-11-25 17:56:57,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 372.25) internal successors, (1489), 4 states have internal predecessors, (1489), 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 17:56:57,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:56:57,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:56:57,527 INFO L175 Difference]: Start difference. First operand has 133 places, 226 transitions, 3011 flow. Second operand 4 states and 1489 transitions. [2022-11-25 17:56:57,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 222 transitions, 3435 flow [2022-11-25 17:56:57,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 222 transitions, 3428 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:56:57,548 INFO L231 Difference]: Finished difference. Result has 131 places, 222 transitions, 3052 flow [2022-11-25 17:56:57,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=2990, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3052, PETRI_PLACES=131, PETRI_TRANSITIONS=222} [2022-11-25 17:56:57,549 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 63 predicate places. [2022-11-25 17:56:57,549 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 222 transitions, 3052 flow [2022-11-25 17:56:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 363.75) internal successors, (1455), 4 states have internal predecessors, (1455), 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 17:56:57,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:57,550 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:57,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:57,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:57,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:56:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -602258589, now seen corresponding path program 1 times [2022-11-25 17:56:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:56:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468299290] [2022-11-25 17:56:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:57,762 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 17:56:57,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:56:57,763 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:57,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:56:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:56:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:58,080 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 17:56:58,106 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 8 treesize of output 7 [2022-11-25 17:56:58,360 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:56:58,360 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 17:56:58,373 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 16 treesize of output 18 [2022-11-25 17:56:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:58,532 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 16 treesize of output 18 [2022-11-25 17:56:58,554 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:56:58,554 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 17:56:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:56:58,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:57:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:57:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:57:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:57:06,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:57:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468299290] [2022-11-25 17:57:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468299290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:57:06,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:57:06,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:57:06,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878219916] [2022-11-25 17:57:06,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:57:06,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:57:06,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:57:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:57:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2022-11-25 17:57:08,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:10,606 WARN L539 Checker$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 17:57:13,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:15,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:18,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:20,585 WARN L539 Checker$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 17:57:22,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:24,785 WARN L539 Checker$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 17:57:26,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:29,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:32,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:34,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:37,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:40,492 WARN L539 Checker$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 17:57:42,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:45,682 WARN L539 Checker$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 17:57:47,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:50,795 WARN L539 Checker$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 17:57:53,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:55,512 WARN L539 Checker$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 17:57:58,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:03,758 WARN L539 Checker$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 17:58:07,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:10,236 WARN L539 Checker$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 17:58:10,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 879 [2022-11-25 17:58:10,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 222 transitions, 3052 flow. Second operand has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 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 17:58:10,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:10,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 879 [2022-11-25 17:58:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:19,388 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:26,731 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:41,336 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 65 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:45,284 INFO L130 PetriNetUnfolder]: 1789/3378 cut-off events. [2022-11-25 17:58:45,285 INFO L131 PetriNetUnfolder]: For 4741/4741 co-relation queries the response was YES. [2022-11-25 17:58:45,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 3378 events. 1789/3378 cut-off events. For 4741/4741 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22333 event pairs, 1059 based on Foata normal form. 148/2200 useless extension candidates. Maximal degree in co-relation 10207. Up to 1032 conditions per place. [2022-11-25 17:58:45,318 INFO L137 encePairwiseOnDemand]: 859/879 looper letters, 303 selfloop transitions, 66 changer transitions 0/369 dead transitions. [2022-11-25 17:58:45,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 369 transitions, 4935 flow [2022-11-25 17:58:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:58:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:58:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3466 transitions. [2022-11-25 17:58:45,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35846519805564175 [2022-11-25 17:58:45,328 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3466 transitions. [2022-11-25 17:58:45,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3466 transitions. [2022-11-25 17:58:45,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:45,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3466 transitions. [2022-11-25 17:58:45,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 315.09090909090907) internal successors, (3466), 11 states have internal predecessors, (3466), 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 17:58:45,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 879.0) internal successors, (10548), 12 states have internal predecessors, (10548), 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 17:58:45,346 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 879.0) internal successors, (10548), 12 states have internal predecessors, (10548), 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 17:58:45,347 INFO L175 Difference]: Start difference. First operand has 131 places, 222 transitions, 3052 flow. Second operand 11 states and 3466 transitions. [2022-11-25 17:58:45,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 369 transitions, 4935 flow [2022-11-25 17:58:45,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 369 transitions, 4903 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:58:45,378 INFO L231 Difference]: Finished difference. Result has 142 places, 236 transitions, 3326 flow [2022-11-25 17:58:45,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3326, PETRI_PLACES=142, PETRI_TRANSITIONS=236} [2022-11-25 17:58:45,379 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 74 predicate places. [2022-11-25 17:58:45,379 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 236 transitions, 3326 flow [2022-11-25 17:58:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 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 17:58:45,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:45,380 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:45,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:58:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:58:45,596 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:58:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -882814953, now seen corresponding path program 1 times [2022-11-25 17:58:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:58:45,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650761888] [2022-11-25 17:58:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:45,598 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 17:58:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:58:45,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:58:45,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:58:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:45,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:58:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:45,856 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 17:58:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:58:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:58:46,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:58:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650761888] [2022-11-25 17:58:46,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650761888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:46,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:58:46,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-11-25 17:58:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126463371] [2022-11-25 17:58:46,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:46,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:58:46,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:58:46,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:58:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:58:54,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 879 [2022-11-25 17:58:54,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 236 transitions, 3326 flow. Second operand has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 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 17:58:54,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:54,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 879 [2022-11-25 17:58:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:57,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:58:59,007 WARN L539 Checker$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 17:59:05,876 INFO L130 PetriNetUnfolder]: 6010/11272 cut-off events. [2022-11-25 17:59:05,877 INFO L131 PetriNetUnfolder]: For 8631/8919 co-relation queries the response was YES. [2022-11-25 17:59:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34899 conditions, 11272 events. 6010/11272 cut-off events. For 8631/8919 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 93220 event pairs, 3918 based on Foata normal form. 24/6374 useless extension candidates. Maximal degree in co-relation 34852. Up to 4319 conditions per place. [2022-11-25 17:59:06,011 INFO L137 encePairwiseOnDemand]: 872/879 looper letters, 300 selfloop transitions, 141 changer transitions 0/444 dead transitions. [2022-11-25 17:59:06,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 444 transitions, 5444 flow [2022-11-25 17:59:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:59:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:59:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3761 transitions. [2022-11-25 17:59:06,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.427872582480091 [2022-11-25 17:59:06,017 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3761 transitions. [2022-11-25 17:59:06,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3761 transitions. [2022-11-25 17:59:06,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:06,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3761 transitions. [2022-11-25 17:59:06,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 376.1) internal successors, (3761), 10 states have internal predecessors, (3761), 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 17:59:06,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 879.0) internal successors, (9669), 11 states have internal predecessors, (9669), 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 17:59:06,027 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 879.0) internal successors, (9669), 11 states have internal predecessors, (9669), 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 17:59:06,027 INFO L175 Difference]: Start difference. First operand has 142 places, 236 transitions, 3326 flow. Second operand 10 states and 3761 transitions. [2022-11-25 17:59:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 444 transitions, 5444 flow [2022-11-25 17:59:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 444 transitions, 5415 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 17:59:06,059 INFO L231 Difference]: Finished difference. Result has 152 places, 241 transitions, 3791 flow [2022-11-25 17:59:06,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3791, PETRI_PLACES=152, PETRI_TRANSITIONS=241} [2022-11-25 17:59:06,060 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 84 predicate places. [2022-11-25 17:59:06,060 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 241 transitions, 3791 flow [2022-11-25 17:59:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 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 17:59:06,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:06,061 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:06,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:06,275 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:59:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1490153497, now seen corresponding path program 1 times [2022-11-25 17:59:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:06,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525815361] [2022-11-25 17:59:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:06,277 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 17:59:06,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:06,278 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:06,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:06,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:59:06,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:06,567 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 17:59:06,734 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:59:06,735 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 17:59:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:59:06,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:06,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:06,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525815361] [2022-11-25 17:59:06,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525815361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:06,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:06,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:59:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963056342] [2022-11-25 17:59:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:59:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:59:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:59:07,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 879 [2022-11-25 17:59:07,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 241 transitions, 3791 flow. Second operand has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 17:59:07,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:07,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 879 [2022-11-25 17:59:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:10,318 INFO L130 PetriNetUnfolder]: 4782/9124 cut-off events. [2022-11-25 17:59:10,318 INFO L131 PetriNetUnfolder]: For 9768/9984 co-relation queries the response was YES. [2022-11-25 17:59:10,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28745 conditions, 9124 events. 4782/9124 cut-off events. For 9768/9984 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 74076 event pairs, 3080 based on Foata normal form. 0/5540 useless extension candidates. Maximal degree in co-relation 28693. Up to 8736 conditions per place. [2022-11-25 17:59:10,411 INFO L137 encePairwiseOnDemand]: 875/879 looper letters, 112 selfloop transitions, 120 changer transitions 0/235 dead transitions. [2022-11-25 17:59:10,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 235 transitions, 4213 flow [2022-11-25 17:59:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:59:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:59:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1501 transitions. [2022-11-25 17:59:10,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.426905574516496 [2022-11-25 17:59:10,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1501 transitions. [2022-11-25 17:59:10,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1501 transitions. [2022-11-25 17:59:10,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:10,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1501 transitions. [2022-11-25 17:59:10,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 375.25) internal successors, (1501), 4 states have internal predecessors, (1501), 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 17:59:10,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:59:10,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 17:59:10,424 INFO L175 Difference]: Start difference. First operand has 152 places, 241 transitions, 3791 flow. Second operand 4 states and 1501 transitions. [2022-11-25 17:59:10,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 235 transitions, 4213 flow [2022-11-25 17:59:10,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 235 transitions, 4100 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 17:59:10,475 INFO L231 Difference]: Finished difference. Result has 150 places, 235 transitions, 3876 flow [2022-11-25 17:59:10,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3876, PETRI_PLACES=150, PETRI_TRANSITIONS=235} [2022-11-25 17:59:10,476 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 82 predicate places. [2022-11-25 17:59:10,476 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 235 transitions, 3876 flow [2022-11-25 17:59:10,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 17:59:10,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:10,477 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:59:10,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Ended with exit code 0 [2022-11-25 17:59:10,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:10,693 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 17:59:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1620928377, now seen corresponding path program 3 times [2022-11-25 17:59:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955041304] [2022-11-25 17:59:10,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:59:10,694 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 17:59:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:10,695 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:10,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 17:59:10,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:59:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:10,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:59:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:11,086 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:59:11,086 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 17:59:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:11,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:15,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955041304] [2022-11-25 17:59:15,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955041304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:15,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:59:15,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:59:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860266576] [2022-11-25 17:59:15,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:59:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:59:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:00:21,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 879 [2022-11-25 18:00:21,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 235 transitions, 3876 flow. Second operand has 24 states, 24 states have (on average 362.0) internal successors, (8688), 24 states have internal predecessors, (8688), 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 18:00:21,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:21,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 879 [2022-11-25 18:00:21,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:38,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:00:40,925 WARN L539 Checker$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 18:00:42,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:00:44,932 WARN L539 Checker$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 18:00:46,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:00:48,938 WARN L539 Checker$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 18:00:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:00:53,016 WARN L539 Checker$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 18:00:55,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:00:57,023 WARN L539 Checker$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 18:01:09,744 INFO L130 PetriNetUnfolder]: 4830/9226 cut-off events. [2022-11-25 18:01:09,745 INFO L131 PetriNetUnfolder]: For 13925/14141 co-relation queries the response was YES. [2022-11-25 18:01:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29518 conditions, 9226 events. 4830/9226 cut-off events. For 13925/14141 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 74747 event pairs, 3080 based on Foata normal form. 18/5660 useless extension candidates. Maximal degree in co-relation 29466. Up to 8779 conditions per place. [2022-11-25 18:01:09,838 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 94 selfloop transitions, 214 changer transitions 0/311 dead transitions. [2022-11-25 18:01:09,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 311 transitions, 5703 flow [2022-11-25 18:01:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:01:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:01:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 8786 transitions. [2022-11-25 18:01:09,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4164770572620402 [2022-11-25 18:01:09,858 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 8786 transitions. [2022-11-25 18:01:09,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 8786 transitions. [2022-11-25 18:01:09,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:09,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 8786 transitions. [2022-11-25 18:01:09,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 366.0833333333333) internal successors, (8786), 24 states have internal predecessors, (8786), 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 18:01:09,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 879.0) internal successors, (21975), 25 states have internal predecessors, (21975), 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 18:01:09,898 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 879.0) internal successors, (21975), 25 states have internal predecessors, (21975), 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 18:01:09,899 INFO L175 Difference]: Start difference. First operand has 150 places, 235 transitions, 3876 flow. Second operand 24 states and 8786 transitions. [2022-11-25 18:01:09,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 311 transitions, 5703 flow [2022-11-25 18:01:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 311 transitions, 5511 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:01:09,955 INFO L231 Difference]: Finished difference. Result has 183 places, 297 transitions, 5439 flow [2022-11-25 18:01:09,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5439, PETRI_PLACES=183, PETRI_TRANSITIONS=297} [2022-11-25 18:01:09,956 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 115 predicate places. [2022-11-25 18:01:09,957 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 297 transitions, 5439 flow [2022-11-25 18:01:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 362.0) internal successors, (8688), 24 states have internal predecessors, (8688), 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 18:01:09,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:09,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:09,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:10,175 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:01:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1490153496, now seen corresponding path program 1 times [2022-11-25 18:01:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477315672] [2022-11-25 18:01:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:10,176 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 18:01:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:10,178 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:10,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:01:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:10,659 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 8 treesize of output 7 [2022-11-25 18:01:10,679 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 18:01:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:10,817 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 16 [2022-11-25 18:01:10,842 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:01:10,843 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 18:01:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:01:11,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:13,307 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd c_~id_0~0 |c_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.offset| (_ bv1 32)))) (and (or (bvule (bvadd c_~id_0~0 |c_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.offset|) .cse0) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_123| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_123|))))) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_123| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_123|))) (forall ((v_ArrVal_717 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_123| v_ArrVal_717) |c_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base|))))))) is different from false [2022-11-25 18:01:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:01:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:01:13,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477315672] [2022-11-25 18:01:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477315672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:13,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:01:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:01:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859099025] [2022-11-25 18:01:13,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:13,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:01:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:01:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=72, Unknown=1, NotChecked=18, Total=132 [2022-11-25 18:01:15,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 879 [2022-11-25 18:01:15,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 297 transitions, 5439 flow. Second operand has 12 states, 12 states have (on average 276.0) internal successors, (3312), 12 states have internal predecessors, (3312), 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 18:01:15,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:15,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 879 [2022-11-25 18:01:15,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:20,020 INFO L130 PetriNetUnfolder]: 3937/7612 cut-off events. [2022-11-25 18:01:20,020 INFO L131 PetriNetUnfolder]: For 13165/13165 co-relation queries the response was YES. [2022-11-25 18:01:20,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25207 conditions, 7612 events. 3937/7612 cut-off events. For 13165/13165 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 59200 event pairs, 2527 based on Foata normal form. 0/5260 useless extension candidates. Maximal degree in co-relation 25142. Up to 4472 conditions per place. [2022-11-25 18:01:20,110 INFO L137 encePairwiseOnDemand]: 871/879 looper letters, 190 selfloop transitions, 162 changer transitions 0/352 dead transitions. [2022-11-25 18:01:20,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 352 transitions, 6489 flow [2022-11-25 18:01:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:01:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:01:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2819 transitions. [2022-11-25 18:01:20,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32070534698521047 [2022-11-25 18:01:20,116 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2819 transitions. [2022-11-25 18:01:20,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2819 transitions. [2022-11-25 18:01:20,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:20,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2819 transitions. [2022-11-25 18:01:20,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 281.9) internal successors, (2819), 10 states have internal predecessors, (2819), 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 18:01:20,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 879.0) internal successors, (9669), 11 states have internal predecessors, (9669), 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 18:01:20,132 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 879.0) internal successors, (9669), 11 states have internal predecessors, (9669), 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 18:01:20,133 INFO L175 Difference]: Start difference. First operand has 183 places, 297 transitions, 5439 flow. Second operand 10 states and 2819 transitions. [2022-11-25 18:01:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 352 transitions, 6489 flow [2022-11-25 18:01:20,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 352 transitions, 6123 flow, removed 55 selfloop flow, removed 8 redundant places. [2022-11-25 18:01:20,214 INFO L231 Difference]: Finished difference. Result has 182 places, 291 transitions, 5379 flow [2022-11-25 18:01:20,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5379, PETRI_PLACES=182, PETRI_TRANSITIONS=291} [2022-11-25 18:01:20,215 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2022-11-25 18:01:20,216 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 291 transitions, 5379 flow [2022-11-25 18:01:20,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 276.0) internal successors, (3312), 12 states have internal predecessors, (3312), 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 18:01:20,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:20,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:20,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Ended with exit code 0 [2022-11-25 18:01:20,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:20,433 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:01:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1050159624, now seen corresponding path program 1 times [2022-11-25 18:01:20,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:20,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563014392] [2022-11-25 18:01:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:20,434 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 18:01:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:20,436 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:20,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:01:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:20,664 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 18:01:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:01:20,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:20,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563014392] [2022-11-25 18:01:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563014392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:20,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:20,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:01:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480767202] [2022-11-25 18:01:20,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:20,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:01:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:01:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:01:21,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 879 [2022-11-25 18:01:21,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 291 transitions, 5379 flow. Second operand has 4 states, 4 states have (on average 368.25) internal successors, (1473), 4 states have internal predecessors, (1473), 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 18:01:21,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:21,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 879 [2022-11-25 18:01:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:23,414 INFO L130 PetriNetUnfolder]: 2766/5586 cut-off events. [2022-11-25 18:01:23,415 INFO L131 PetriNetUnfolder]: For 14552/14768 co-relation queries the response was YES. [2022-11-25 18:01:23,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19075 conditions, 5586 events. 2766/5586 cut-off events. For 14552/14768 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43199 event pairs, 1676 based on Foata normal form. 0/4150 useless extension candidates. Maximal degree in co-relation 19010. Up to 4925 conditions per place. [2022-11-25 18:01:23,463 INFO L137 encePairwiseOnDemand]: 875/879 looper letters, 243 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2022-11-25 18:01:23,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 286 transitions, 5911 flow [2022-11-25 18:01:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:01:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:01:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1497 transitions. [2022-11-25 18:01:23,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4257679180887372 [2022-11-25 18:01:23,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1497 transitions. [2022-11-25 18:01:23,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1497 transitions. [2022-11-25 18:01:23,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:23,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1497 transitions. [2022-11-25 18:01:23,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 374.25) internal successors, (1497), 4 states have internal predecessors, (1497), 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 18:01:23,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 18:01:23,471 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 18:01:23,471 INFO L175 Difference]: Start difference. First operand has 182 places, 291 transitions, 5379 flow. Second operand 4 states and 1497 transitions. [2022-11-25 18:01:23,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 286 transitions, 5911 flow [2022-11-25 18:01:23,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 286 transitions, 5840 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 18:01:23,520 INFO L231 Difference]: Finished difference. Result has 178 places, 286 transitions, 5354 flow [2022-11-25 18:01:23,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5274, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5354, PETRI_PLACES=178, PETRI_TRANSITIONS=286} [2022-11-25 18:01:23,521 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 110 predicate places. [2022-11-25 18:01:23,521 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 286 transitions, 5354 flow [2022-11-25 18:01:23,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.25) internal successors, (1473), 4 states have internal predecessors, (1473), 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 18:01:23,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:23,522 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:23,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:23,724 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:01:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1050159625, now seen corresponding path program 1 times [2022-11-25 18:01:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:23,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475337536] [2022-11-25 18:01:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:23,725 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 18:01:23,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:23,726 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:23,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:01:23,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:24,147 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 18:01:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:01:24,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:01:25,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475337536] [2022-11-25 18:01:25,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475337536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:25,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:01:25,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-25 18:01:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867336876] [2022-11-25 18:01:25,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:01:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:01:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:01:40,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 879 [2022-11-25 18:01:40,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 286 transitions, 5354 flow. Second operand has 15 states, 15 states have (on average 338.73333333333335) internal successors, (5081), 15 states have internal predecessors, (5081), 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 18:01:40,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:40,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 879 [2022-11-25 18:01:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:47,215 INFO L130 PetriNetUnfolder]: 2890/6078 cut-off events. [2022-11-25 18:01:47,215 INFO L131 PetriNetUnfolder]: For 15002/15218 co-relation queries the response was YES. [2022-11-25 18:01:47,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20053 conditions, 6078 events. 2890/6078 cut-off events. For 15002/15218 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 49669 event pairs, 1206 based on Foata normal form. 0/4748 useless extension candidates. Maximal degree in co-relation 19989. Up to 2879 conditions per place. [2022-11-25 18:01:47,277 INFO L137 encePairwiseOnDemand]: 866/879 looper letters, 193 selfloop transitions, 165 changer transitions 0/361 dead transitions. [2022-11-25 18:01:47,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 361 transitions, 6398 flow [2022-11-25 18:01:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:01:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:01:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4823 transitions. [2022-11-25 18:01:47,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3919226393629124 [2022-11-25 18:01:47,283 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4823 transitions. [2022-11-25 18:01:47,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4823 transitions. [2022-11-25 18:01:47,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:47,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4823 transitions. [2022-11-25 18:01:47,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 344.5) internal successors, (4823), 14 states have internal predecessors, (4823), 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 18:01:47,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 879.0) internal successors, (13185), 15 states have internal predecessors, (13185), 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 18:01:47,301 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 879.0) internal successors, (13185), 15 states have internal predecessors, (13185), 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 18:01:47,302 INFO L175 Difference]: Start difference. First operand has 178 places, 286 transitions, 5354 flow. Second operand 14 states and 4823 transitions. [2022-11-25 18:01:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 361 transitions, 6398 flow [2022-11-25 18:01:47,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 361 transitions, 6322 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:01:47,363 INFO L231 Difference]: Finished difference. Result has 193 places, 291 transitions, 5803 flow [2022-11-25 18:01:47,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5803, PETRI_PLACES=193, PETRI_TRANSITIONS=291} [2022-11-25 18:01:47,364 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 125 predicate places. [2022-11-25 18:01:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 291 transitions, 5803 flow [2022-11-25 18:01:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 338.73333333333335) internal successors, (5081), 15 states have internal predecessors, (5081), 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 18:01:47,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:47,365 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:47,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:47,566 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:01:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash 201503473, now seen corresponding path program 2 times [2022-11-25 18:01:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:47,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147221950] [2022-11-25 18:01:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:01:47,567 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 18:01:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:47,568 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:47,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:47,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:01:47,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 18:01:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:47,906 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-25 18:01:47,906 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-25 18:01:48,025 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:01:48,025 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:01:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:48,218 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 16 treesize of output 18 [2022-11-25 18:01:48,262 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:01:48,262 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 18:01:48,544 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 18:01:48,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 18:01:48,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 18:01:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:48,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 18:01:48,770 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 18:01:48,771 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 18:01:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 18:01:48,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:48,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:48,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147221950] [2022-11-25 18:01:48,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147221950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:48,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:48,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:01:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489683003] [2022-11-25 18:01:48,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:01:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:01:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:01:51,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 879 [2022-11-25 18:01:51,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 291 transitions, 5803 flow. Second operand has 5 states, 5 states have (on average 357.2) internal successors, (1786), 5 states have internal predecessors, (1786), 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 18:01:51,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:51,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 879 [2022-11-25 18:01:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:54,183 INFO L130 PetriNetUnfolder]: 2468/4958 cut-off events. [2022-11-25 18:01:54,183 INFO L131 PetriNetUnfolder]: For 22482/22482 co-relation queries the response was YES. [2022-11-25 18:01:54,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19572 conditions, 4958 events. 2468/4958 cut-off events. For 22482/22482 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36449 event pairs, 1416 based on Foata normal form. 66/4519 useless extension candidates. Maximal degree in co-relation 19503. Up to 4888 conditions per place. [2022-11-25 18:01:54,228 INFO L137 encePairwiseOnDemand]: 873/879 looper letters, 261 selfloop transitions, 23 changer transitions 0/285 dead transitions. [2022-11-25 18:01:54,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 285 transitions, 6323 flow [2022-11-25 18:01:54,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:01:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:01:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1457 transitions. [2022-11-25 18:01:54,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41439135381114905 [2022-11-25 18:01:54,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1457 transitions. [2022-11-25 18:01:54,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1457 transitions. [2022-11-25 18:01:54,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:54,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1457 transitions. [2022-11-25 18:01:54,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 364.25) internal successors, (1457), 4 states have internal predecessors, (1457), 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 18:01:54,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 18:01:54,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 879.0) internal successors, (4395), 5 states have internal predecessors, (4395), 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 18:01:54,238 INFO L175 Difference]: Start difference. First operand has 193 places, 291 transitions, 5803 flow. Second operand 4 states and 1457 transitions. [2022-11-25 18:01:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 285 transitions, 6323 flow [2022-11-25 18:01:54,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 285 transitions, 5796 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-11-25 18:01:54,300 INFO L231 Difference]: Finished difference. Result has 182 places, 285 transitions, 5274 flow [2022-11-25 18:01:54,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5228, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5274, PETRI_PLACES=182, PETRI_TRANSITIONS=285} [2022-11-25 18:01:54,301 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2022-11-25 18:01:54,301 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 285 transitions, 5274 flow [2022-11-25 18:01:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 357.2) internal successors, (1786), 5 states have internal predecessors, (1786), 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 18:01:54,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:54,302 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:54,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:54,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:54,505 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:01:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -979759528, now seen corresponding path program 2 times [2022-11-25 18:01:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476386984] [2022-11-25 18:01:54,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:01:54,506 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 18:01:54,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:54,507 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:54,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:01:54,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:01:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:01:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:54,755 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 10 treesize of output 9 [2022-11-25 18:01:54,768 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 18:01:55,012 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:01:55,012 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 18:01:55,027 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 16 treesize of output 18 [2022-11-25 18:01:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:55,158 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 16 treesize of output 18 [2022-11-25 18:01:55,193 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:01:55,193 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 18:01:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 18:01:55,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:55,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:55,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476386984] [2022-11-25 18:01:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476386984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:55,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:55,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:01:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972916344] [2022-11-25 18:01:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:01:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:01:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:01:57,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 879 [2022-11-25 18:01:57,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 285 transitions, 5274 flow. Second operand has 6 states, 6 states have (on average 352.8333333333333) internal successors, (2117), 6 states have internal predecessors, (2117), 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 18:01:57,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:57,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 879 [2022-11-25 18:01:57,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:59,924 INFO L130 PetriNetUnfolder]: 2248/4417 cut-off events. [2022-11-25 18:01:59,925 INFO L131 PetriNetUnfolder]: For 20494/20494 co-relation queries the response was YES. [2022-11-25 18:01:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17183 conditions, 4417 events. 2248/4417 cut-off events. For 20494/20494 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30925 event pairs, 1266 based on Foata normal form. 110/4103 useless extension candidates. Maximal degree in co-relation 17117. Up to 4328 conditions per place. [2022-11-25 18:01:59,971 INFO L137 encePairwiseOnDemand]: 874/879 looper letters, 223 selfloop transitions, 59 changer transitions 0/282 dead transitions. [2022-11-25 18:01:59,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 5809 flow [2022-11-25 18:01:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:01:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:01:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1789 transitions. [2022-11-25 18:01:59,975 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40705346985210467 [2022-11-25 18:01:59,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1789 transitions. [2022-11-25 18:01:59,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1789 transitions. [2022-11-25 18:01:59,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:59,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1789 transitions. [2022-11-25 18:01:59,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 357.8) internal successors, (1789), 5 states have internal predecessors, (1789), 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 18:01:59,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 879.0) internal successors, (5274), 6 states have internal predecessors, (5274), 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 18:01:59,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 879.0) internal successors, (5274), 6 states have internal predecessors, (5274), 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 18:01:59,983 INFO L175 Difference]: Start difference. First operand has 182 places, 285 transitions, 5274 flow. Second operand 5 states and 1789 transitions. [2022-11-25 18:01:59,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 5809 flow [2022-11-25 18:02:00,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 282 transitions, 5769 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:00,064 INFO L231 Difference]: Finished difference. Result has 179 places, 282 transitions, 5323 flow [2022-11-25 18:02:00,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5205, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5323, PETRI_PLACES=179, PETRI_TRANSITIONS=282} [2022-11-25 18:02:00,073 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2022-11-25 18:02:00,074 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 282 transitions, 5323 flow [2022-11-25 18:02:00,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 352.8333333333333) internal successors, (2117), 6 states have internal predecessors, (2117), 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 18:02:00,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:00,075 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:00,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:00,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:02:00,298 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:02:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1463915257, now seen corresponding path program 2 times [2022-11-25 18:02:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:00,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453596320] [2022-11-25 18:02:00,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:00,299 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 18:02:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:00,300 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:02:00,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:02:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:02:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:02:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:00,589 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 8 treesize of output 7 [2022-11-25 18:02:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:02:00,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:00,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453596320] [2022-11-25 18:02:00,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453596320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:00,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:00,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:02:00,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300688575] [2022-11-25 18:02:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:02:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:02:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:02,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 879 [2022-11-25 18:02:02,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 282 transitions, 5323 flow. Second operand has 6 states, 6 states have (on average 367.1666666666667) internal successors, (2203), 6 states have internal predecessors, (2203), 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 18:02:02,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:02,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 879 [2022-11-25 18:02:02,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:04,088 INFO L130 PetriNetUnfolder]: 1672/3329 cut-off events. [2022-11-25 18:02:04,088 INFO L131 PetriNetUnfolder]: For 19277/19277 co-relation queries the response was YES. [2022-11-25 18:02:04,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13014 conditions, 3329 events. 1672/3329 cut-off events. For 19277/19277 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22079 event pairs, 882 based on Foata normal form. 336/3337 useless extension candidates. Maximal degree in co-relation 12951. Up to 2823 conditions per place. [2022-11-25 18:02:04,120 INFO L137 encePairwiseOnDemand]: 873/879 looper letters, 130 selfloop transitions, 147 changer transitions 0/277 dead transitions. [2022-11-25 18:02:04,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 277 transitions, 5827 flow [2022-11-25 18:02:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2222 transitions. [2022-11-25 18:02:04,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42131209708001516 [2022-11-25 18:02:04,124 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2222 transitions. [2022-11-25 18:02:04,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2222 transitions. [2022-11-25 18:02:04,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:04,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2222 transitions. [2022-11-25 18:02:04,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 370.3333333333333) internal successors, (2222), 6 states have internal predecessors, (2222), 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 18:02:04,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 879.0) internal successors, (6153), 7 states have internal predecessors, (6153), 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 18:02:04,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 879.0) internal successors, (6153), 7 states have internal predecessors, (6153), 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 18:02:04,130 INFO L175 Difference]: Start difference. First operand has 179 places, 282 transitions, 5323 flow. Second operand 6 states and 2222 transitions. [2022-11-25 18:02:04,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 277 transitions, 5827 flow [2022-11-25 18:02:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 277 transitions, 5738 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:04,174 INFO L231 Difference]: Finished difference. Result has 176 places, 277 transitions, 5478 flow [2022-11-25 18:02:04,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5478, PETRI_PLACES=176, PETRI_TRANSITIONS=277} [2022-11-25 18:02:04,176 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 108 predicate places. [2022-11-25 18:02:04,176 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 277 transitions, 5478 flow [2022-11-25 18:02:04,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 367.1666666666667) internal successors, (2203), 6 states have internal predecessors, (2203), 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 18:02:04,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:04,177 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:04,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:04,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:02:04,380 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:02:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1471375913, now seen corresponding path program 2 times [2022-11-25 18:02:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387086810] [2022-11-25 18:02:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:04,381 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 18:02:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:04,382 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:02:04,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 (31)] Waiting until timeout for monitored process [2022-11-25 18:02:04,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:02:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:04,841 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 8 treesize of output 7 [2022-11-25 18:02:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:02:05,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:07,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387086810] [2022-11-25 18:02:07,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387086810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:07,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:07,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2022-11-25 18:02:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384544733] [2022-11-25 18:02:07,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:02:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:02:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:02:53,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 879 [2022-11-25 18:02:53,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 277 transitions, 5478 flow. Second operand has 21 states, 21 states have (on average 350.2857142857143) internal successors, (7356), 21 states have internal predecessors, (7356), 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 18:02:53,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:53,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 879 [2022-11-25 18:02:53,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:11,304 INFO L130 PetriNetUnfolder]: 2230/4431 cut-off events. [2022-11-25 18:03:11,304 INFO L131 PetriNetUnfolder]: For 18839/18839 co-relation queries the response was YES. [2022-11-25 18:03:11,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16961 conditions, 4431 events. 2230/4431 cut-off events. For 18839/18839 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30831 event pairs, 1348 based on Foata normal form. 6/3989 useless extension candidates. Maximal degree in co-relation 16901. Up to 1609 conditions per place. [2022-11-25 18:03:11,333 INFO L137 encePairwiseOnDemand]: 869/879 looper letters, 458 selfloop transitions, 142 changer transitions 0/600 dead transitions. [2022-11-25 18:03:11,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 600 transitions, 9632 flow [2022-11-25 18:03:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:03:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:03:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7570 transitions. [2022-11-25 18:03:11,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4100980551492497 [2022-11-25 18:03:11,343 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7570 transitions. [2022-11-25 18:03:11,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7570 transitions. [2022-11-25 18:03:11,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:11,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7570 transitions. [2022-11-25 18:03:11,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 360.4761904761905) internal successors, (7570), 21 states have internal predecessors, (7570), 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 18:03:11,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 879.0) internal successors, (19338), 22 states have internal predecessors, (19338), 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 18:03:11,373 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 879.0) internal successors, (19338), 22 states have internal predecessors, (19338), 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 18:03:11,373 INFO L175 Difference]: Start difference. First operand has 176 places, 277 transitions, 5478 flow. Second operand 21 states and 7570 transitions. [2022-11-25 18:03:11,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 600 transitions, 9632 flow [2022-11-25 18:03:11,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 600 transitions, 9213 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:03:11,447 INFO L231 Difference]: Finished difference. Result has 198 places, 346 transitions, 7161 flow [2022-11-25 18:03:11,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7161, PETRI_PLACES=198, PETRI_TRANSITIONS=346} [2022-11-25 18:03:11,448 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 130 predicate places. [2022-11-25 18:03:11,448 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 346 transitions, 7161 flow [2022-11-25 18:03:11,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 350.2857142857143) internal successors, (7356), 21 states have internal predecessors, (7356), 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 18:03:11,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:11,449 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:11,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 (31)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:11,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:03:11,662 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:03:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1386937938, now seen corresponding path program 2 times [2022-11-25 18:03:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:03:11,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887581588] [2022-11-25 18:03:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:03:11,664 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 18:03:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:03:11,664 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:03:11,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 (32)] Waiting until timeout for monitored process [2022-11-25 18:03:11,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:03:11,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:03:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 18:03:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:12,040 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 8 treesize of output 7 [2022-11-25 18:03:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:03:12,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:16,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:03:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887581588] [2022-11-25 18:03:16,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887581588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:16,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:03:16,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2022-11-25 18:03:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452106588] [2022-11-25 18:03:16,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:16,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:03:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:03:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:03:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:04:33,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 879 [2022-11-25 18:04:33,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 346 transitions, 7161 flow. Second operand has 27 states, 27 states have (on average 350.14814814814815) internal successors, (9454), 27 states have internal predecessors, (9454), 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 18:04:33,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:33,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 879 [2022-11-25 18:04:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:46,655 INFO L130 PetriNetUnfolder]: 3038/5999 cut-off events. [2022-11-25 18:04:46,655 INFO L131 PetriNetUnfolder]: For 17880/17880 co-relation queries the response was YES. [2022-11-25 18:04:46,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20791 conditions, 5999 events. 3038/5999 cut-off events. For 17880/17880 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 44067 event pairs, 1842 based on Foata normal form. 12/5339 useless extension candidates. Maximal degree in co-relation 20725. Up to 2059 conditions per place. [2022-11-25 18:04:46,699 INFO L137 encePairwiseOnDemand]: 870/879 looper letters, 310 selfloop transitions, 112 changer transitions 0/422 dead transitions. [2022-11-25 18:04:46,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 422 transitions, 7754 flow [2022-11-25 18:04:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:04:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:04:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7440 transitions. [2022-11-25 18:04:46,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4030554201202665 [2022-11-25 18:04:46,711 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7440 transitions. [2022-11-25 18:04:46,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7440 transitions. [2022-11-25 18:04:46,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:46,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7440 transitions. [2022-11-25 18:04:46,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 354.2857142857143) internal successors, (7440), 21 states have internal predecessors, (7440), 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 18:04:46,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 879.0) internal successors, (19338), 22 states have internal predecessors, (19338), 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 18:04:46,741 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 879.0) internal successors, (19338), 22 states have internal predecessors, (19338), 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 18:04:46,741 INFO L175 Difference]: Start difference. First operand has 198 places, 346 transitions, 7161 flow. Second operand 21 states and 7440 transitions. [2022-11-25 18:04:46,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 422 transitions, 7754 flow [2022-11-25 18:04:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 422 transitions, 7646 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:04:46,810 INFO L231 Difference]: Finished difference. Result has 224 places, 307 transitions, 6227 flow [2022-11-25 18:04:46,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=879, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6227, PETRI_PLACES=224, PETRI_TRANSITIONS=307} [2022-11-25 18:04:46,812 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 156 predicate places. [2022-11-25 18:04:46,812 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 307 transitions, 6227 flow [2022-11-25 18:04:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 350.14814814814815) internal successors, (9454), 27 states have internal predecessors, (9454), 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 18:04:46,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:46,814 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1] [2022-11-25 18:04:46,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 (32)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:04:47,029 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-25 18:04:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -522704417, now seen corresponding path program 1 times [2022-11-25 18:04:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99589455] [2022-11-25 18:04:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:47,030 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 18:04:47,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:47,031 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 18:04:47,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69bf556-d7d7-4e6d-8c57-3865c81b682d/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 (33)] Waiting until timeout for monitored process [2022-11-25 18:04:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 18:04:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:47,253 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 8 treesize of output 7 [2022-11-25 18:04:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:04:48,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:04:54,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99589455] [2022-11-25 18:04:54,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99589455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:54,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:54,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-25 18:04:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604894862] [2022-11-25 18:04:54,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 18:04:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 18:04:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756