./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8 --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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- 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-2329fc7 [2022-12-13 11:25:41,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:25:41,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:25:41,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:25:41,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:25:41,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:25:41,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:25:41,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:25:41,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:25:41,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:25:41,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:25:41,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:25:41,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:25:41,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:25:41,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:25:41,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:25:41,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:25:41,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:25:41,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:25:41,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:25:41,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:25:41,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:25:41,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:25:41,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:25:41,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:25:41,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:25:41,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:25:41,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:25:41,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:25:41,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:25:41,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:25:41,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:25:41,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:25:41,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:25:41,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:25:41,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:25:41,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:25:41,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:25:41,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:25:41,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:25:41,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:25:41,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:25:41,935 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:25:41,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:25:41,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:25:41,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:25:41,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:25:41,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:25:41,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:25:41,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:25:41,941 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:25:41,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:25:41,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:25:41,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:25:41,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:25:41,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:25:41,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:25:41,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:25:41,943 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:25:41,944 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_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-12-13 11:25:42,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:25:42,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:25:42,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:25:42,121 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:25:42,121 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:25:42,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-12-13 11:25:44,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:25:44,838 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:25:44,838 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-12-13 11:25:44,844 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/5073c7b14/db4073eee6a2482dae930c79956dcf21/FLAGcb426ce33 [2022-12-13 11:25:44,857 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/5073c7b14/db4073eee6a2482dae930c79956dcf21 [2022-12-13 11:25:44,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:25:44,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:25:44,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:25:44,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:25:44,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:25:44,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:25:44" (1/1) ... [2022-12-13 11:25:44,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1571ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:44, skipping insertion in model container [2022-12-13 11:25:44,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:25:44" (1/1) ... [2022-12-13 11:25:44,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:25:44,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:25:45,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:25:45,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:25:45,025 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_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-12-13 11:25:45,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:25:45,048 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) [2022-12-13 11:25:45,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37338d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:45, skipping insertion in model container [2022-12-13 11:25:45,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:25:45,049 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:25:45,051 INFO L158 Benchmark]: Toolchain (without parser) took 189.67ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 67.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:25:45,051 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:25:45,052 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.01ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 67.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:25:45,053 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.01ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 67.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8 --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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- 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-2329fc7 [2022-12-13 11:25:46,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:25:46,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:25:46,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:25:46,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:25:46,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:25:46,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:25:46,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:25:46,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:25:46,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:25:46,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:25:46,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:25:46,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:25:46,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:25:46,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:25:46,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:25:46,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:25:46,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:25:46,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:25:46,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:25:46,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:25:46,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:25:46,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:25:46,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:25:46,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:25:46,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:25:46,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:25:46,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:25:46,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:25:46,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:25:46,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:25:46,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:25:46,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:25:46,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:25:46,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:25:46,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:25:46,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:25:46,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:25:46,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:25:46,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:25:46,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:25:46,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:25:46,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:25:46,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:25:46,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:25:46,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:25:46,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:25:46,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:25:46,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:25:46,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:25:46,486 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:25:46,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:25:46,486 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:25:46,486 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:25:46,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:25:46,487 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:25:46,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:25:46,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:25:46,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:25:46,489 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:25:46,490 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_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-12-13 11:25:46,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:25:46,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:25:46,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:25:46,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:25:46,745 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:25:46,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-12-13 11:25:49,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:25:49,476 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:25:49,477 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-12-13 11:25:49,482 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/bf68e5cf3/148708236b00439a856c966ef1c41054/FLAGfdc956cc4 [2022-12-13 11:25:49,492 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/data/bf68e5cf3/148708236b00439a856c966ef1c41054 [2022-12-13 11:25:49,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:25:49,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:25:49,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:25:49,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:25:49,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:25:49,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce98eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49, skipping insertion in model container [2022-12-13 11:25:49,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:25:49,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:25:49,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:25:49,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:25:49,644 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_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-12-13 11:25:49,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:25:49,664 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:25:49,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:25:49,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:25:49,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:25:49,678 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_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-12-13 11:25:49,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:25:49,687 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:25:49,700 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:25:49,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:25:49,705 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_60dc76eb-6943-405d-9909-1574a7a91f17/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-12-13 11:25:49,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:25:49,721 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:25:49,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49 WrapperNode [2022-12-13 11:25:49,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:25:49,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:25:49,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:25:49,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:25:49,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,769 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 218 [2022-12-13 11:25:49,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:25:49,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:25:49,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:25:49,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:25:49,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:25:49,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:25:49,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:25:49,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:25:49,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (1/1) ... [2022-12-13 11:25:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:25:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:25:49,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:25:49,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:25:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:25:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:25:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:25:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:25:49,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:25:49,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:25:49,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:25:49,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:25:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:25:49,851 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:25:49,941 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:25:49,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:25:50,457 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:25:50,558 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:25:50,558 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:25:50,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:25:50 BoogieIcfgContainer [2022-12-13 11:25:50,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:25:50,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:25:50,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:25:50,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:25:50,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:25:49" (1/3) ... [2022-12-13 11:25:50,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc0e137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:25:50, skipping insertion in model container [2022-12-13 11:25:50,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:25:49" (2/3) ... [2022-12-13 11:25:50,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc0e137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:25:50, skipping insertion in model container [2022-12-13 11:25:50,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:25:50" (3/3) ... [2022-12-13 11:25:50,567 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2022-12-13 11:25:50,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:25:50,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 11:25:50,581 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:25:50,660 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:25:50,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 254 transitions, 532 flow [2022-12-13 11:25:50,755 INFO L130 PetriNetUnfolder]: 18/251 cut-off events. [2022-12-13 11:25:50,755 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:25:50,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 18/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 489 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-12-13 11:25:50,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 254 transitions, 532 flow [2022-12-13 11:25:50,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 246 transitions, 510 flow [2022-12-13 11:25:50,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:25:50,777 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 246 transitions, 510 flow [2022-12-13 11:25:50,779 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 246 transitions, 510 flow [2022-12-13 11:25:50,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 246 transitions, 510 flow [2022-12-13 11:25:50,817 INFO L130 PetriNetUnfolder]: 18/246 cut-off events. [2022-12-13 11:25:50,817 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:25:50,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 246 events. 18/246 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 487 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-12-13 11:25:50,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 12240 [2022-12-13 11:26:27,388 INFO L134 LiptonReduction]: Checked pairs total: 13515 [2022-12-13 11:26:27,388 INFO L136 LiptonReduction]: Total number of compositions: 275 [2022-12-13 11:26:27,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:26:27,408 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;@17c027f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:26:27,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-13 11:26:27,410 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:26:27,410 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:26:27,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:27,411 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:26:27,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash 36900, now seen corresponding path program 1 times [2022-12-13 11:26:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846658398] [2022-12-13 11:26:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:27,423 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 [2022-12-13 11:26:27,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:27,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:26:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:27,668 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:26:27,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:26:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:27,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:27,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846658398] [2022-12-13 11:26:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846658398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:27,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:27,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:26:27,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983923094] [2022-12-13 11:26:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:26:27,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:26:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:26:27,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 529 [2022-12-13 11:26:27,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:27,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:27,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 529 [2022-12-13 11:26:27,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:28,599 INFO L130 PetriNetUnfolder]: 3710/4745 cut-off events. [2022-12-13 11:26:28,599 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-12-13 11:26:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9581 conditions, 4745 events. 3710/4745 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 20450 event pairs, 1901 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 8432. Up to 4709 conditions per place. [2022-12-13 11:26:28,632 INFO L137 encePairwiseOnDemand]: 518/529 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 11:26:28,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 192 flow [2022-12-13 11:26:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:26:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:26:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-12-13 11:26:28,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4543163201008192 [2022-12-13 11:26:28,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-12-13 11:26:28,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-12-13 11:26:28,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:28,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-12-13 11:26:28,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:28,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:28,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:28,668 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 721 transitions. [2022-12-13 11:26:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 192 flow [2022-12-13 11:26:28,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:26:28,679 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 98 flow [2022-12-13 11:26:28,681 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-12-13 11:26:28,684 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -14 predicate places. [2022-12-13 11:26:28,685 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 98 flow [2022-12-13 11:26:28,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:28,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:28,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:26:28,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:28,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash 36901, now seen corresponding path program 1 times [2022-12-13 11:26:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:28,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378326666] [2022-12-13 11:26:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:28,889 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 [2022-12-13 11:26:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:28,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:28,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:26:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:29,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:26:29,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:26:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:29,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:29,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:29,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378326666] [2022-12-13 11:26:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378326666] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:29,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:29,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:26:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275095648] [2022-12-13 11:26:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:29,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:26:29,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:26:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:26:29,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 529 [2022-12-13 11:26:29,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:29,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:29,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 529 [2022-12-13 11:26:29,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:30,713 INFO L130 PetriNetUnfolder]: 7419/9488 cut-off events. [2022-12-13 11:26:30,714 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 11:26:30,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 9488 events. 7419/9488 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 45208 event pairs, 3802 based on Foata normal form. 0/3010 useless extension candidates. Maximal degree in co-relation 18988. Up to 4710 conditions per place. [2022-12-13 11:26:30,757 INFO L137 encePairwiseOnDemand]: 526/529 looper letters, 80 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-12-13 11:26:30,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 85 transitions, 348 flow [2022-12-13 11:26:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:26:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:26:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-12-13 11:26:30,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47385003150598615 [2022-12-13 11:26:30,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-12-13 11:26:30,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-12-13 11:26:30,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:30,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-12-13 11:26:30,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:30,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:30,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:30,763 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 98 flow. Second operand 3 states and 752 transitions. [2022-12-13 11:26:30,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 85 transitions, 348 flow [2022-12-13 11:26:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 85 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:26:30,765 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 109 flow [2022-12-13 11:26:30,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 11:26:30,766 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2022-12-13 11:26:30,766 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 109 flow [2022-12-13 11:26:30,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:30,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:30,766 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:26:30,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 11:26:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:30,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:30,970 INFO L85 PathProgramCache]: Analyzing trace with hash 37140, now seen corresponding path program 1 times [2022-12-13 11:26:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:30,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82230914] [2022-12-13 11:26:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:30,972 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 [2022-12-13 11:26:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:30,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:30,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:26:31,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:31,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:31,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82230914] [2022-12-13 11:26:31,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82230914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:31,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:31,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:26:31,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471622327] [2022-12-13 11:26:31,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:31,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:26:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:26:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:26:31,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 529 [2022-12-13 11:26:31,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:31,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:31,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 529 [2022-12-13 11:26:31,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:31,742 INFO L130 PetriNetUnfolder]: 3710/4746 cut-off events. [2022-12-13 11:26:31,742 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:26:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9509 conditions, 4746 events. 3710/4746 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 20475 event pairs, 1901 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 9501. Up to 4710 conditions per place. [2022-12-13 11:26:31,756 INFO L137 encePairwiseOnDemand]: 524/529 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 11:26:31,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 195 flow [2022-12-13 11:26:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:26:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:26:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-12-13 11:26:31,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4543163201008192 [2022-12-13 11:26:31,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-12-13 11:26:31,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-12-13 11:26:31,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:31,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-12-13 11:26:31,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:31,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:31,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:31,762 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 109 flow. Second operand 3 states and 721 transitions. [2022-12-13 11:26:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 195 flow [2022-12-13 11:26:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:26:31,763 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 117 flow [2022-12-13 11:26:31,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2022-12-13 11:26:31,764 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2022-12-13 11:26:31,764 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 117 flow [2022-12-13 11:26:31,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:31,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:31,765 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:26:31,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:26:31,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:31,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1150731, now seen corresponding path program 1 times [2022-12-13 11:26:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249272706] [2022-12-13 11:26:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:31,969 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 [2022-12-13 11:26:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:31,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:31,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:26:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:32,163 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:26:32,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:26:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:32,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:32,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249272706] [2022-12-13 11:26:32,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249272706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:32,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:32,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:26:32,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678384109] [2022-12-13 11:26:32,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:32,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:26:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:26:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:26:33,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 529 [2022-12-13 11:26:33,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:33,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:33,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 529 [2022-12-13 11:26:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:34,737 INFO L130 PetriNetUnfolder]: 7425/9497 cut-off events. [2022-12-13 11:26:34,737 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 11:26:34,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19035 conditions, 9497 events. 7425/9497 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 45275 event pairs, 3802 based on Foata normal form. 0/3017 useless extension candidates. Maximal degree in co-relation 19025. Up to 4713 conditions per place. [2022-12-13 11:26:34,765 INFO L137 encePairwiseOnDemand]: 523/529 looper letters, 80 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2022-12-13 11:26:34,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 425 flow [2022-12-13 11:26:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:26:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:26:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1402 transitions. [2022-12-13 11:26:34,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4417139256458727 [2022-12-13 11:26:34,769 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1402 transitions. [2022-12-13 11:26:34,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1402 transitions. [2022-12-13 11:26:34,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:34,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1402 transitions. [2022-12-13 11:26:34,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.66666666666666) internal successors, (1402), 6 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:34,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 529.0) internal successors, (3703), 7 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:34,775 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 529.0) internal successors, (3703), 7 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:34,775 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 117 flow. Second operand 6 states and 1402 transitions. [2022-12-13 11:26:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 425 flow [2022-12-13 11:26:34,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 94 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:26:34,777 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 211 flow [2022-12-13 11:26:34,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-12-13 11:26:34,777 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2022-12-13 11:26:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 211 flow [2022-12-13 11:26:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:34,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:34,778 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:26:34,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:26:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:34,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1150970, now seen corresponding path program 1 times [2022-12-13 11:26:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:34,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801320183] [2022-12-13 11:26:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:34,980 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 [2022-12-13 11:26:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:34,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:26:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:35,105 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-13 11:26:35,105 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-13 11:26:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:26:35,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:35,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:35,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801320183] [2022-12-13 11:26:35,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801320183] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:35,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:35,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:26:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394531211] [2022-12-13 11:26:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:35,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:26:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:26:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:26:35,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 529 [2022-12-13 11:26:35,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:35,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:35,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 529 [2022-12-13 11:26:35,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:36,136 INFO L130 PetriNetUnfolder]: 5827/7537 cut-off events. [2022-12-13 11:26:36,137 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 11:26:36,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15141 conditions, 7537 events. 5827/7537 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 35624 event pairs, 2974 based on Foata normal form. 0/2477 useless extension candidates. Maximal degree in co-relation 15127. Up to 7465 conditions per place. [2022-12-13 11:26:36,165 INFO L137 encePairwiseOnDemand]: 526/529 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 11:26:36,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 281 flow [2022-12-13 11:26:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:26:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:26:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2022-12-13 11:26:36,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44801512287334594 [2022-12-13 11:26:36,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2022-12-13 11:26:36,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2022-12-13 11:26:36,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:36,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2022-12-13 11:26:36,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:36,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:36,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:36,173 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 211 flow. Second operand 3 states and 711 transitions. [2022-12-13 11:26:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 281 flow [2022-12-13 11:26:36,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 263 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 11:26:36,175 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 169 flow [2022-12-13 11:26:36,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-12-13 11:26:36,176 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2022-12-13 11:26:36,176 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 169 flow [2022-12-13 11:26:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:36,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:36,177 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:26:36,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:26:36,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:36,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1150972, now seen corresponding path program 1 times [2022-12-13 11:26:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839972077] [2022-12-13 11:26:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:36,380 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 [2022-12-13 11:26:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:36,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:36,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:26:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:26:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:26:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:26:36,558 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 11:26:36,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 11:26:36,578 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:26:36,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 11:26:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:36,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:37,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839972077] [2022-12-13 11:26:37,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839972077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:37,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:26:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020415939] [2022-12-13 11:26:37,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:26:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:26:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:26:37,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 529 [2022-12-13 11:26:37,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 169 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:37,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:37,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 529 [2022-12-13 11:26:37,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:39,289 INFO L130 PetriNetUnfolder]: 5027/6556 cut-off events. [2022-12-13 11:26:39,289 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-13 11:26:39,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 6556 events. 5027/6556 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 31079 event pairs, 2560 based on Foata normal form. 0/2322 useless extension candidates. Maximal degree in co-relation 13149. Up to 3729 conditions per place. [2022-12-13 11:26:39,307 INFO L137 encePairwiseOnDemand]: 523/529 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2022-12-13 11:26:39,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 399 flow [2022-12-13 11:26:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:26:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:26:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1583 transitions. [2022-12-13 11:26:39,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42749122333243317 [2022-12-13 11:26:39,310 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1583 transitions. [2022-12-13 11:26:39,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1583 transitions. [2022-12-13 11:26:39,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:39,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1583 transitions. [2022-12-13 11:26:39,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 226.14285714285714) internal successors, (1583), 7 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:39,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 529.0) internal successors, (4232), 8 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:39,316 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 529.0) internal successors, (4232), 8 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:39,317 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 169 flow. Second operand 7 states and 1583 transitions. [2022-12-13 11:26:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 399 flow [2022-12-13 11:26:39,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:26:39,318 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 176 flow [2022-12-13 11:26:39,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2022-12-13 11:26:39,319 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2022-12-13 11:26:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 176 flow [2022-12-13 11:26:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:39,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:39,319 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:26:39,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 11:26:39,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:39,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1106110656, now seen corresponding path program 1 times [2022-12-13 11:26:39,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96949364] [2022-12-13 11:26:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:39,524 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 [2022-12-13 11:26:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:39,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:39,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:26:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:26:39,783 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-12-13 11:26:39,783 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-12-13 11:26:39,795 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 [2022-12-13 11:26:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:40,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96949364] [2022-12-13 11:26:40,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96949364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:40,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:26:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600649880] [2022-12-13 11:26:40,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:40,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:26:40,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:26:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:26:42,512 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 [0] [2022-12-13 11:26:43,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 529 [2022-12-13 11:26:43,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 215.25) internal successors, (1722), 8 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:43,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:43,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 529 [2022-12-13 11:26:43,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:44,698 INFO L130 PetriNetUnfolder]: 4825/6282 cut-off events. [2022-12-13 11:26:44,698 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-12-13 11:26:44,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 6282 events. 4825/6282 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 29324 event pairs, 2454 based on Foata normal form. 0/2412 useless extension candidates. Maximal degree in co-relation 12760. Up to 3597 conditions per place. [2022-12-13 11:26:44,716 INFO L137 encePairwiseOnDemand]: 525/529 looper letters, 74 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-12-13 11:26:44,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 404 flow [2022-12-13 11:26:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:26:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:26:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1147 transitions. [2022-12-13 11:26:44,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433648393194707 [2022-12-13 11:26:44,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1147 transitions. [2022-12-13 11:26:44,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1147 transitions. [2022-12-13 11:26:44,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:44,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1147 transitions. [2022-12-13 11:26:44,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.4) internal successors, (1147), 5 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:44,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:44,727 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:44,727 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 176 flow. Second operand 5 states and 1147 transitions. [2022-12-13 11:26:44,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 404 flow [2022-12-13 11:26:44,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 378 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 11:26:44,729 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 152 flow [2022-12-13 11:26:44,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2022-12-13 11:26:44,730 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2022-12-13 11:26:44,730 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 152 flow [2022-12-13 11:26:44,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.25) internal successors, (1722), 8 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:44,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:44,731 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:26:44,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 11:26:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:44,934 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1106110655, now seen corresponding path program 1 times [2022-12-13 11:26:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555654158] [2022-12-13 11:26:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:44,937 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 [2022-12-13 11:26:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:44,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:44,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:26:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:45,085 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 11:26:45,085 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 11:26:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:26:45,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:45,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:45,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555654158] [2022-12-13 11:26:45,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555654158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:45,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:45,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:26:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935494620] [2022-12-13 11:26:45,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:45,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:26:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:26:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:26:45,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 529 [2022-12-13 11:26:45,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:45,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:45,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 529 [2022-12-13 11:26:45,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:46,001 INFO L130 PetriNetUnfolder]: 4623/6008 cut-off events. [2022-12-13 11:26:46,001 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-12-13 11:26:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12218 conditions, 6008 events. 4623/6008 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 28025 event pairs, 2348 based on Foata normal form. 0/2315 useless extension candidates. Maximal degree in co-relation 12202. Up to 5936 conditions per place. [2022-12-13 11:26:46,019 INFO L137 encePairwiseOnDemand]: 526/529 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 11:26:46,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 45 transitions, 232 flow [2022-12-13 11:26:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:26:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:26:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2022-12-13 11:26:46,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44549464398235666 [2022-12-13 11:26:46,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2022-12-13 11:26:46,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2022-12-13 11:26:46,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:46,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2022-12-13 11:26:46,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:46,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:46,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:46,025 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 152 flow. Second operand 3 states and 707 transitions. [2022-12-13 11:26:46,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 45 transitions, 232 flow [2022-12-13 11:26:46,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 227 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:26:46,026 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 145 flow [2022-12-13 11:26:46,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-12-13 11:26:46,026 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2022-12-13 11:26:46,026 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 145 flow [2022-12-13 11:26:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:46,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:46,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:26:46,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 11:26:46,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:46,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash -70317745, now seen corresponding path program 1 times [2022-12-13 11:26:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700382666] [2022-12-13 11:26:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:46,232 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 [2022-12-13 11:26:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:46,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:46,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:26:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:46,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:46,584 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 25 treesize of output 21 [2022-12-13 11:26:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:46,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:46,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700382666] [2022-12-13 11:26:46,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700382666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:46,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:46,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:26:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945657215] [2022-12-13 11:26:46,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:46,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:26:46,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:26:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:26:48,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 529 [2022-12-13 11:26:48,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 145 flow. Second operand has 10 states, 10 states have (on average 214.2) internal successors, (2142), 10 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:48,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:48,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 529 [2022-12-13 11:26:48,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:50,976 INFO L130 PetriNetUnfolder]: 7308/9665 cut-off events. [2022-12-13 11:26:50,977 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-12-13 11:26:50,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19730 conditions, 9665 events. 7308/9665 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 49830 event pairs, 1997 based on Foata normal form. 0/4176 useless extension candidates. Maximal degree in co-relation 19714. Up to 2683 conditions per place. [2022-12-13 11:26:51,006 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 149 selfloop transitions, 16 changer transitions 0/167 dead transitions. [2022-12-13 11:26:51,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 167 transitions, 749 flow [2022-12-13 11:26:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:26:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:26:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2506 transitions. [2022-12-13 11:26:51,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43065818869221517 [2022-12-13 11:26:51,011 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2506 transitions. [2022-12-13 11:26:51,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2506 transitions. [2022-12-13 11:26:51,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:51,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2506 transitions. [2022-12-13 11:26:51,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.8181818181818) internal successors, (2506), 11 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:51,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:51,020 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:51,020 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 145 flow. Second operand 11 states and 2506 transitions. [2022-12-13 11:26:51,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 167 transitions, 749 flow [2022-12-13 11:26:51,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 167 transitions, 748 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:26:51,023 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 221 flow [2022-12-13 11:26:51,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=221, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2022-12-13 11:26:51,023 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2022-12-13 11:26:51,023 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 221 flow [2022-12-13 11:26:51,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.2) internal successors, (2142), 10 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:51,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:51,024 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:26:51,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 11:26:51,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:26:51,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash -71558747, now seen corresponding path program 2 times [2022-12-13 11:26:51,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748390689] [2022-12-13 11:26:51,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:26:51,226 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 [2022-12-13 11:26:51,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:51,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:26:51,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:26:51,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:26:51,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:26:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:26:51,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:51,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:26:51,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:26:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:51,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:26:52,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748390689] [2022-12-13 11:26:52,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748390689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:52,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:52,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:26:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094258269] [2022-12-13 11:26:52,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:26:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:26:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:26:56,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 529 [2022-12-13 11:26:56,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:56,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:56,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 529 [2022-12-13 11:26:56,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:05,295 INFO L130 PetriNetUnfolder]: 32388/43026 cut-off events. [2022-12-13 11:27:05,295 INFO L131 PetriNetUnfolder]: For 14793/16691 co-relation queries the response was YES. [2022-12-13 11:27:05,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96818 conditions, 43026 events. 32388/43026 cut-off events. For 14793/16691 co-relation queries the response was YES. Maximal size of possible extension queue 2339. Compared 263802 event pairs, 19205 based on Foata normal form. 1904/23146 useless extension candidates. Maximal degree in co-relation 96797. Up to 4939 conditions per place. [2022-12-13 11:27:05,501 INFO L137 encePairwiseOnDemand]: 524/529 looper letters, 313 selfloop transitions, 13 changer transitions 0/330 dead transitions. [2022-12-13 11:27:05,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 330 transitions, 1733 flow [2022-12-13 11:27:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:27:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:27:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2942 transitions. [2022-12-13 11:27:05,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46345305608065535 [2022-12-13 11:27:05,508 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2942 transitions. [2022-12-13 11:27:05,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2942 transitions. [2022-12-13 11:27:05,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:05,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2942 transitions. [2022-12-13 11:27:05,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 245.16666666666666) internal successors, (2942), 12 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:05,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 529.0) internal successors, (6877), 13 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:05,519 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 529.0) internal successors, (6877), 13 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:05,519 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 221 flow. Second operand 12 states and 2942 transitions. [2022-12-13 11:27:05,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 330 transitions, 1733 flow [2022-12-13 11:27:05,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 330 transitions, 1716 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 11:27:05,534 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 320 flow [2022-12-13 11:27:05,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2022-12-13 11:27:05,535 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 22 predicate places. [2022-12-13 11:27:05,535 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 320 flow [2022-12-13 11:27:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:05,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:05,536 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:27:05,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:05,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -71558506, now seen corresponding path program 2 times [2022-12-13 11:27:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:05,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509106448] [2022-12-13 11:27:05,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:27:05,740 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 [2022-12-13 11:27:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:05,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:05,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:05,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:27:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:27:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:27:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:05,925 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 11:27:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 11:27:05,943 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:27:05,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 11:27:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:27:06,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:27:06,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509106448] [2022-12-13 11:27:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509106448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:06,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:06,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:27:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683090089] [2022-12-13 11:27:06,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:27:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:27:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:27:08,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:27:10,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:27:10,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 529 [2022-12-13 11:27:10,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:10,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:10,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 529 [2022-12-13 11:27:10,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:14,969 INFO L130 PetriNetUnfolder]: 32842/43474 cut-off events. [2022-12-13 11:27:14,969 INFO L131 PetriNetUnfolder]: For 14201/16085 co-relation queries the response was YES. [2022-12-13 11:27:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97898 conditions, 43474 events. 32842/43474 cut-off events. For 14201/16085 co-relation queries the response was YES. Maximal size of possible extension queue 2303. Compared 265961 event pairs, 19415 based on Foata normal form. 1884/22909 useless extension candidates. Maximal degree in co-relation 97871. Up to 43114 conditions per place. [2022-12-13 11:27:15,253 INFO L137 encePairwiseOnDemand]: 527/529 looper letters, 53 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-12-13 11:27:15,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 58 transitions, 404 flow [2022-12-13 11:27:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:27:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:27:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2022-12-13 11:27:15,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44234404536862004 [2022-12-13 11:27:15,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2022-12-13 11:27:15,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2022-12-13 11:27:15,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:15,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2022-12-13 11:27:15,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:15,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:15,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:15,259 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 320 flow. Second operand 3 states and 702 transitions. [2022-12-13 11:27:15,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 58 transitions, 404 flow [2022-12-13 11:27:15,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 379 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 11:27:15,277 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 273 flow [2022-12-13 11:27:15,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2022-12-13 11:27:15,277 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 18 predicate places. [2022-12-13 11:27:15,277 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 273 flow [2022-12-13 11:27:15,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:15,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:15,278 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:27:15,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:15,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -70317746, now seen corresponding path program 1 times [2022-12-13 11:27:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:15,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906595696] [2022-12-13 11:27:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:15,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:15,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:15,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:15,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:27:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:15,639 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:27:15,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:27:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:15,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:27:15,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:15,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906595696] [2022-12-13 11:27:15,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906595696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:15,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:15,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:27:15,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934313727] [2022-12-13 11:27:15,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:15,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:27:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:27:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:27:15,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 529 [2022-12-13 11:27:15,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:15,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:15,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 529 [2022-12-13 11:27:15,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:18,476 INFO L130 PetriNetUnfolder]: 17359/23459 cut-off events. [2022-12-13 11:27:18,476 INFO L131 PetriNetUnfolder]: For 9569/10879 co-relation queries the response was YES. [2022-12-13 11:27:18,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54294 conditions, 23459 events. 17359/23459 cut-off events. For 9569/10879 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 138554 event pairs, 10195 based on Foata normal form. 1310/15094 useless extension candidates. Maximal degree in co-relation 54266. Up to 23230 conditions per place. [2022-12-13 11:27:18,591 INFO L137 encePairwiseOnDemand]: 524/529 looper letters, 45 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2022-12-13 11:27:18,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 55 transitions, 369 flow [2022-12-13 11:27:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:27:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:27:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 883 transitions. [2022-12-13 11:27:18,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.417296786389414 [2022-12-13 11:27:18,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 883 transitions. [2022-12-13 11:27:18,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 883 transitions. [2022-12-13 11:27:18,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:18,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 883 transitions. [2022-12-13 11:27:18,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:18,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 529.0) internal successors, (2645), 5 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:18,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 529.0) internal successors, (2645), 5 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:18,597 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 273 flow. Second operand 4 states and 883 transitions. [2022-12-13 11:27:18,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 55 transitions, 369 flow [2022-12-13 11:27:18,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 55 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:27:18,625 INFO L231 Difference]: Finished difference. Result has 78 places, 55 transitions, 278 flow [2022-12-13 11:27:18,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2022-12-13 11:27:18,626 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2022-12-13 11:27:18,626 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 278 flow [2022-12-13 11:27:18,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:18,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:18,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:18,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:18,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:18,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2115444024, now seen corresponding path program 1 times [2022-12-13 11:27:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:18,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025303787] [2022-12-13 11:27:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:18,830 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 [2022-12-13 11:27:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:18,833 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:27:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:19,080 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 11:27:19,080 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 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 11:27:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:19,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:27:19,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:19,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025303787] [2022-12-13 11:27:19,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025303787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:19,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:19,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:27:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718755550] [2022-12-13 11:27:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:19,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:27:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:27:19,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:27:19,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 529 [2022-12-13 11:27:19,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:19,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:19,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 529 [2022-12-13 11:27:19,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:21,966 INFO L130 PetriNetUnfolder]: 16522/22235 cut-off events. [2022-12-13 11:27:21,967 INFO L131 PetriNetUnfolder]: For 9191/10411 co-relation queries the response was YES. [2022-12-13 11:27:22,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51452 conditions, 22235 events. 16522/22235 cut-off events. For 9191/10411 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 129236 event pairs, 9646 based on Foata normal form. 1220/14464 useless extension candidates. Maximal degree in co-relation 51423. Up to 22019 conditions per place. [2022-12-13 11:27:22,070 INFO L137 encePairwiseOnDemand]: 526/529 looper letters, 48 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 11:27:22,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 53 transitions, 372 flow [2022-12-13 11:27:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:27:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:27:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2022-12-13 11:27:22,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4360428481411468 [2022-12-13 11:27:22,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2022-12-13 11:27:22,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2022-12-13 11:27:22,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:22,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2022-12-13 11:27:22,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:22,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:22,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:22,075 INFO L175 Difference]: Start difference. First operand has 78 places, 55 transitions, 278 flow. Second operand 3 states and 692 transitions. [2022-12-13 11:27:22,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 53 transitions, 372 flow [2022-12-13 11:27:22,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 53 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:27:22,092 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 269 flow [2022-12-13 11:27:22,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2022-12-13 11:27:22,093 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2022-12-13 11:27:22,093 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 269 flow [2022-12-13 11:27:22,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:22,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:22,093 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:22,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:22,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:22,295 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2115444023, now seen corresponding path program 1 times [2022-12-13 11:27:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420244746] [2022-12-13 11:27:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:22,297 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 [2022-12-13 11:27:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:22,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:22,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:27:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:22,499 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:27:22,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:27:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:22,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:22,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420244746] [2022-12-13 11:27:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420244746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:27:22,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:22,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:27:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434829433] [2022-12-13 11:27:22,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:27:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:27:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:27:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:27:25,183 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] [2022-12-13 11:27:26,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 529 [2022-12-13 11:27:26,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 269 flow. Second operand has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:26,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:26,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 529 [2022-12-13 11:27:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:29,356 INFO L130 PetriNetUnfolder]: 15685/21011 cut-off events. [2022-12-13 11:27:29,356 INFO L131 PetriNetUnfolder]: For 8743/9873 co-relation queries the response was YES. [2022-12-13 11:27:29,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48599 conditions, 21011 events. 15685/21011 cut-off events. For 8743/9873 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 119553 event pairs, 9097 based on Foata normal form. 1130/14034 useless extension candidates. Maximal degree in co-relation 48570. Up to 19076 conditions per place. [2022-12-13 11:27:29,466 INFO L137 encePairwiseOnDemand]: 525/529 looper letters, 66 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-12-13 11:27:29,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 461 flow [2022-12-13 11:27:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:27:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:27:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2022-12-13 11:27:29,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264650283553875 [2022-12-13 11:27:29,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2022-12-13 11:27:29,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2022-12-13 11:27:29,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:29,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2022-12-13 11:27:29,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:29,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:29,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:29,473 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 269 flow. Second operand 5 states and 1128 transitions. [2022-12-13 11:27:29,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 461 flow [2022-12-13 11:27:29,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:27:29,481 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 270 flow [2022-12-13 11:27:29,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2022-12-13 11:27:29,482 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 16 predicate places. [2022-12-13 11:27:29,482 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 270 flow [2022-12-13 11:27:29,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:29,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:29,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:29,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:29,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:29,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1154247322, now seen corresponding path program 1 times [2022-12-13 11:27:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421403174] [2022-12-13 11:27:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:29,686 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 [2022-12-13 11:27:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:29,689 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:27:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:29,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:30,023 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 25 treesize of output 21 [2022-12-13 11:27:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:30,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421403174] [2022-12-13 11:27:30,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421403174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:27:30,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:30,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:27:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100425313] [2022-12-13 11:27:30,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:27:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:27:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:27:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:27:32,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 529 [2022-12-13 11:27:32,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:32,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:32,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 529 [2022-12-13 11:27:32,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:37,136 INFO L130 PetriNetUnfolder]: 23195/31695 cut-off events. [2022-12-13 11:27:37,136 INFO L131 PetriNetUnfolder]: For 16133/18049 co-relation queries the response was YES. [2022-12-13 11:27:37,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74502 conditions, 31695 events. 23195/31695 cut-off events. For 16133/18049 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 196345 event pairs, 6617 based on Foata normal form. 1916/23559 useless extension candidates. Maximal degree in co-relation 74472. Up to 14353 conditions per place. [2022-12-13 11:27:37,306 INFO L137 encePairwiseOnDemand]: 522/529 looper letters, 127 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2022-12-13 11:27:37,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 848 flow [2022-12-13 11:27:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:27:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:27:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2465 transitions. [2022-12-13 11:27:37,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4236123045196769 [2022-12-13 11:27:37,312 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2465 transitions. [2022-12-13 11:27:37,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2465 transitions. [2022-12-13 11:27:37,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:37,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2465 transitions. [2022-12-13 11:27:37,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 224.0909090909091) internal successors, (2465), 11 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:37,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:37,320 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:37,320 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 270 flow. Second operand 11 states and 2465 transitions. [2022-12-13 11:27:37,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 848 flow [2022-12-13 11:27:37,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 843 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:27:37,329 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 334 flow [2022-12-13 11:27:37,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2022-12-13 11:27:37,330 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2022-12-13 11:27:37,330 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 334 flow [2022-12-13 11:27:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:37,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:37,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:37,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:37,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1144331295, now seen corresponding path program 1 times [2022-12-13 11:27:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945469892] [2022-12-13 11:27:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:37,533 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 [2022-12-13 11:27:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:37,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:37,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:27:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:37,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:27:37,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:27:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:38,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945469892] [2022-12-13 11:27:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945469892] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:27:38,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:38,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:27:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035281146] [2022-12-13 11:27:38,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:27:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:27:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:27:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:27:41,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 529 [2022-12-13 11:27:41,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:41,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:41,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 529 [2022-12-13 11:27:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:49,028 INFO L130 PetriNetUnfolder]: 37631/50366 cut-off events. [2022-12-13 11:27:49,028 INFO L131 PetriNetUnfolder]: For 35137/38507 co-relation queries the response was YES. [2022-12-13 11:27:49,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136466 conditions, 50366 events. 37631/50366 cut-off events. For 35137/38507 co-relation queries the response was YES. Maximal size of possible extension queue 2009. Compared 315544 event pairs, 4069 based on Foata normal form. 6858/46509 useless extension candidates. Maximal degree in co-relation 136432. Up to 14182 conditions per place. [2022-12-13 11:27:49,381 INFO L137 encePairwiseOnDemand]: 522/529 looper letters, 125 selfloop transitions, 20 changer transitions 0/148 dead transitions. [2022-12-13 11:27:49,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 148 transitions, 967 flow [2022-12-13 11:27:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:27:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:27:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1805 transitions. [2022-12-13 11:27:49,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42651228733459357 [2022-12-13 11:27:49,386 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1805 transitions. [2022-12-13 11:27:49,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1805 transitions. [2022-12-13 11:27:49,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:49,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1805 transitions. [2022-12-13 11:27:49,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 225.625) internal successors, (1805), 8 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:49,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 529.0) internal successors, (4761), 9 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:49,392 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 529.0) internal successors, (4761), 9 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:49,392 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 334 flow. Second operand 8 states and 1805 transitions. [2022-12-13 11:27:49,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 148 transitions, 967 flow [2022-12-13 11:27:49,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 148 transitions, 956 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:27:49,444 INFO L231 Difference]: Finished difference. Result has 96 places, 65 transitions, 446 flow [2022-12-13 11:27:49,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=446, PETRI_PLACES=96, PETRI_TRANSITIONS=65} [2022-12-13 11:27:49,444 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 35 predicate places. [2022-12-13 11:27:49,444 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 65 transitions, 446 flow [2022-12-13 11:27:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:49,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:49,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:49,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:49,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:49,646 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1130325696, now seen corresponding path program 1 times [2022-12-13 11:27:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:49,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004558753] [2022-12-13 11:27:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:49,649 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 [2022-12-13 11:27:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:49,652 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:49,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:27:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:49,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:49,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004558753] [2022-12-13 11:27:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004558753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:27:49,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-12-13 11:27:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081420511] [2022-12-13 11:27:49,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:27:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:27:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:27:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:27:50,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 529 [2022-12-13 11:27:50,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 65 transitions, 446 flow. Second operand has 11 states, 11 states have (on average 217.63636363636363) internal successors, (2394), 11 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:50,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:50,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 529 [2022-12-13 11:27:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:58,375 INFO L130 PetriNetUnfolder]: 37835/50605 cut-off events. [2022-12-13 11:27:58,376 INFO L131 PetriNetUnfolder]: For 97860/102365 co-relation queries the response was YES. [2022-12-13 11:27:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161820 conditions, 50605 events. 37835/50605 cut-off events. For 97860/102365 co-relation queries the response was YES. Maximal size of possible extension queue 2060. Compared 312361 event pairs, 18245 based on Foata normal form. 4641/44486 useless extension candidates. Maximal degree in co-relation 161781. Up to 36193 conditions per place. [2022-12-13 11:27:58,772 INFO L137 encePairwiseOnDemand]: 522/529 looper letters, 108 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2022-12-13 11:27:58,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 122 transitions, 966 flow [2022-12-13 11:27:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:27:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:27:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2023 transitions. [2022-12-13 11:27:58,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42491073303927746 [2022-12-13 11:27:58,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2023 transitions. [2022-12-13 11:27:58,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2023 transitions. [2022-12-13 11:27:58,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:58,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2023 transitions. [2022-12-13 11:27:58,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 224.77777777777777) internal successors, (2023), 9 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:58,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 529.0) internal successors, (5290), 10 states have internal predecessors, (5290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:58,783 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 529.0) internal successors, (5290), 10 states have internal predecessors, (5290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:58,783 INFO L175 Difference]: Start difference. First operand has 96 places, 65 transitions, 446 flow. Second operand 9 states and 2023 transitions. [2022-12-13 11:27:58,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 122 transitions, 966 flow [2022-12-13 11:27:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 949 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 11:27:58,868 INFO L231 Difference]: Finished difference. Result has 101 places, 63 transitions, 449 flow [2022-12-13 11:27:58,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=101, PETRI_TRANSITIONS=63} [2022-12-13 11:27:58,868 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 40 predicate places. [2022-12-13 11:27:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 63 transitions, 449 flow [2022-12-13 11:27:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 217.63636363636363) internal successors, (2394), 11 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:58,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:58,869 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:58,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:27:59,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:27:59,070 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -511138405, now seen corresponding path program 1 times [2022-12-13 11:27:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935570147] [2022-12-13 11:27:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:59,073 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 [2022-12-13 11:27:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:59,076 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:27:59,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:27:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:27:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:27:59,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:27:59,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935570147] [2022-12-13 11:27:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935570147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:59,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:27:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486729116] [2022-12-13 11:27:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:59,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:27:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:27:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:27:59,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 529 [2022-12-13 11:27:59,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 63 transitions, 449 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:59,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:59,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 529 [2022-12-13 11:27:59,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:28:03,698 INFO L130 PetriNetUnfolder]: 23090/31582 cut-off events. [2022-12-13 11:28:03,698 INFO L131 PetriNetUnfolder]: For 52984/58080 co-relation queries the response was YES. [2022-12-13 11:28:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103615 conditions, 31582 events. 23090/31582 cut-off events. For 52984/58080 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 194855 event pairs, 15286 based on Foata normal form. 7712/32511 useless extension candidates. Maximal degree in co-relation 103575. Up to 31477 conditions per place. [2022-12-13 11:28:03,942 INFO L137 encePairwiseOnDemand]: 527/529 looper letters, 56 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2022-12-13 11:28:03,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 62 transitions, 559 flow [2022-12-13 11:28:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:28:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:28:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2022-12-13 11:28:03,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43730308758664144 [2022-12-13 11:28:03,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2022-12-13 11:28:03,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2022-12-13 11:28:03,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:28:03,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2022-12-13 11:28:03,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:03,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:03,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 529.0) internal successors, (2116), 4 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:03,947 INFO L175 Difference]: Start difference. First operand has 101 places, 63 transitions, 449 flow. Second operand 3 states and 694 transitions. [2022-12-13 11:28:03,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 62 transitions, 559 flow [2022-12-13 11:28:04,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 62 transitions, 550 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:28:04,006 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 438 flow [2022-12-13 11:28:04,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=438, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2022-12-13 11:28:04,007 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 37 predicate places. [2022-12-13 11:28:04,007 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 438 flow [2022-12-13 11:28:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:04,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:28:04,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:28:04,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:28:04,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:28:04,209 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:28:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:28:04,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1138573695, now seen corresponding path program 1 times [2022-12-13 11:28:04,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:28:04,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21986737] [2022-12-13 11:28:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:28:04,211 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 [2022-12-13 11:28:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:28:04,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:28:04,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:28:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:28:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:28:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:28:04,408 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:28:04,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:28:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:04,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:28:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:05,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:28:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21986737] [2022-12-13 11:28:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21986737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:28:05,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:28:05,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:28:05,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633157366] [2022-12-13 11:28:05,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:28:05,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:28:05,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:28:05,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:28:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:28:10,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 529 [2022-12-13 11:28:10,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:10,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:28:10,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 529 [2022-12-13 11:28:10,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:28:18,750 INFO L130 PetriNetUnfolder]: 22287/31671 cut-off events. [2022-12-13 11:28:18,751 INFO L131 PetriNetUnfolder]: For 65822/71740 co-relation queries the response was YES. [2022-12-13 11:28:18,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108391 conditions, 31671 events. 22287/31671 cut-off events. For 65822/71740 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 198001 event pairs, 15543 based on Foata normal form. 5918/33792 useless extension candidates. Maximal degree in co-relation 108351. Up to 20749 conditions per place. [2022-12-13 11:28:18,973 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 141 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2022-12-13 11:28:18,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1239 flow [2022-12-13 11:28:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:28:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:28:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2410 transitions. [2022-12-13 11:28:18,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4141605086784671 [2022-12-13 11:28:18,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2410 transitions. [2022-12-13 11:28:18,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2410 transitions. [2022-12-13 11:28:18,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:28:18,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2410 transitions. [2022-12-13 11:28:18,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 219.0909090909091) internal successors, (2410), 11 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:18,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:18,985 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 529.0) internal successors, (6348), 12 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:18,985 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 438 flow. Second operand 11 states and 2410 transitions. [2022-12-13 11:28:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1239 flow [2022-12-13 11:28:19,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 160 transitions, 1238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:28:19,032 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 491 flow [2022-12-13 11:28:19,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=491, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2022-12-13 11:28:19,033 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 48 predicate places. [2022-12-13 11:28:19,033 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 491 flow [2022-12-13 11:28:19,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:19,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:28:19,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:28:19,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:28:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:28:19,234 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:28:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:28:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 936051726, now seen corresponding path program 1 times [2022-12-13 11:28:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:28:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716162312] [2022-12-13 11:28:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:28:19,237 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 [2022-12-13 11:28:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:28:19,239 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:28:19,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:28:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:28:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:28:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:28:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:19,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:28:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:19,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:28:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716162312] [2022-12-13 11:28:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716162312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:28:19,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:28:19,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:28:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792876776] [2022-12-13 11:28:19,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:28:19,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:28:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:28:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:28:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:28:20,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 529 [2022-12-13 11:28:20,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 491 flow. Second operand has 12 states, 12 states have (on average 217.83333333333334) internal successors, (2614), 12 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:20,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:28:20,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 529 [2022-12-13 11:28:20,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:28:26,396 INFO L130 PetriNetUnfolder]: 22107/31431 cut-off events. [2022-12-13 11:28:26,396 INFO L131 PetriNetUnfolder]: For 76819/82631 co-relation queries the response was YES. [2022-12-13 11:28:26,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118985 conditions, 31431 events. 22107/31431 cut-off events. For 76819/82631 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 196789 event pairs, 12567 based on Foata normal form. 5872/35660 useless extension candidates. Maximal degree in co-relation 118942. Up to 23305 conditions per place. [2022-12-13 11:28:26,648 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 124 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2022-12-13 11:28:26,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 140 transitions, 1182 flow [2022-12-13 11:28:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:28:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:28:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2246 transitions. [2022-12-13 11:28:26,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42457466918714554 [2022-12-13 11:28:26,651 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2246 transitions. [2022-12-13 11:28:26,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2246 transitions. [2022-12-13 11:28:26,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:28:26,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2246 transitions. [2022-12-13 11:28:26,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 224.6) internal successors, (2246), 10 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:26,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 529.0) internal successors, (5819), 11 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:26,657 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 529.0) internal successors, (5819), 11 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:26,657 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 491 flow. Second operand 10 states and 2246 transitions. [2022-12-13 11:28:26,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 140 transitions, 1182 flow [2022-12-13 11:28:26,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 1144 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-12-13 11:28:26,885 INFO L231 Difference]: Finished difference. Result has 112 places, 67 transitions, 493 flow [2022-12-13 11:28:26,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=493, PETRI_PLACES=112, PETRI_TRANSITIONS=67} [2022-12-13 11:28:26,885 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 51 predicate places. [2022-12-13 11:28:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 67 transitions, 493 flow [2022-12-13 11:28:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.83333333333334) internal successors, (2614), 12 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:26,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:28:26,886 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:28:26,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:28:27,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:28:27,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:28:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:28:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1326325670, now seen corresponding path program 2 times [2022-12-13 11:28:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:28:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192333114] [2022-12-13 11:28:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:28:27,089 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 [2022-12-13 11:28:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:28:27,092 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:28:27,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:28:27,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:28:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:28:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:28:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:28:27,344 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:28:27,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:28:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:27,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:28:27,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:28:27,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-12-13 11:28:27,746 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 70 treesize of output 68 [2022-12-13 11:28:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:28,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:28:28,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192333114] [2022-12-13 11:28:28,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192333114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:28:28,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:28:28,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:28:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301701799] [2022-12-13 11:28:28,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:28:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:28:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:28:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:28:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:28:34,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 529 [2022-12-13 11:28:34,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 67 transitions, 493 flow. Second operand has 14 states, 14 states have (on average 210.57142857142858) internal successors, (2948), 14 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:34,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:28:34,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 529 [2022-12-13 11:28:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:28:46,132 INFO L130 PetriNetUnfolder]: 29943/41515 cut-off events. [2022-12-13 11:28:46,133 INFO L131 PetriNetUnfolder]: For 114388/118999 co-relation queries the response was YES. [2022-12-13 11:28:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173663 conditions, 41515 events. 29943/41515 cut-off events. For 114388/118999 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 269754 event pairs, 11211 based on Foata normal form. 5211/43127 useless extension candidates. Maximal degree in co-relation 173621. Up to 12764 conditions per place. [2022-12-13 11:28:46,488 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 284 selfloop transitions, 26 changer transitions 0/315 dead transitions. [2022-12-13 11:28:46,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 315 transitions, 2570 flow [2022-12-13 11:28:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:28:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:28:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3773 transitions. [2022-12-13 11:28:46,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41954853775158457 [2022-12-13 11:28:46,494 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3773 transitions. [2022-12-13 11:28:46,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3773 transitions. [2022-12-13 11:28:46,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:28:46,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3773 transitions. [2022-12-13 11:28:46,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 221.94117647058823) internal successors, (3773), 17 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:46,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 529.0) internal successors, (9522), 18 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:46,503 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 529.0) internal successors, (9522), 18 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:46,503 INFO L175 Difference]: Start difference. First operand has 112 places, 67 transitions, 493 flow. Second operand 17 states and 3773 transitions. [2022-12-13 11:28:46,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 315 transitions, 2570 flow [2022-12-13 11:28:46,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 315 transitions, 2551 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 11:28:46,678 INFO L231 Difference]: Finished difference. Result has 125 places, 82 transitions, 656 flow [2022-12-13 11:28:46,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=656, PETRI_PLACES=125, PETRI_TRANSITIONS=82} [2022-12-13 11:28:46,679 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 64 predicate places. [2022-12-13 11:28:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 82 transitions, 656 flow [2022-12-13 11:28:46,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 210.57142857142858) internal successors, (2948), 14 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:46,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:28:46,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:28:46,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:28:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:28:46,880 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:28:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:28:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1577883672, now seen corresponding path program 2 times [2022-12-13 11:28:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:28:46,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524541039] [2022-12-13 11:28:46,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:28:46,883 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 [2022-12-13 11:28:46,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:28:46,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:28:46,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:28:47,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:28:47,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:28:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:28:47,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:28:47,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:28:47,138 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:28:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:47,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:28:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:49,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:28:49,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524541039] [2022-12-13 11:28:49,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524541039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:28:49,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:28:49,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:28:49,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863223914] [2022-12-13 11:28:49,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:28:49,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:28:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:28:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:28:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:29:03,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 529 [2022-12-13 11:29:03,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 82 transitions, 656 flow. Second operand has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:03,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:03,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 529 [2022-12-13 11:29:03,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:19,437 INFO L130 PetriNetUnfolder]: 31235/43971 cut-off events. [2022-12-13 11:29:19,438 INFO L131 PetriNetUnfolder]: For 154886/162655 co-relation queries the response was YES. [2022-12-13 11:29:19,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188997 conditions, 43971 events. 31235/43971 cut-off events. For 154886/162655 co-relation queries the response was YES. Maximal size of possible extension queue 1463. Compared 284364 event pairs, 12371 based on Foata normal form. 7529/49330 useless extension candidates. Maximal degree in co-relation 188953. Up to 10944 conditions per place. [2022-12-13 11:29:19,824 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 306 selfloop transitions, 25 changer transitions 0/337 dead transitions. [2022-12-13 11:29:19,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 337 transitions, 2907 flow [2022-12-13 11:29:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:29:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:29:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4167 transitions. [2022-12-13 11:29:19,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4145856133718038 [2022-12-13 11:29:19,831 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4167 transitions. [2022-12-13 11:29:19,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4167 transitions. [2022-12-13 11:29:19,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:19,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4167 transitions. [2022-12-13 11:29:19,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 219.31578947368422) internal successors, (4167), 19 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:19,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 529.0) internal successors, (10580), 20 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:19,842 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 529.0) internal successors, (10580), 20 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:19,842 INFO L175 Difference]: Start difference. First operand has 125 places, 82 transitions, 656 flow. Second operand 19 states and 4167 transitions. [2022-12-13 11:29:19,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 337 transitions, 2907 flow [2022-12-13 11:29:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2846 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-12-13 11:29:20,241 INFO L231 Difference]: Finished difference. Result has 139 places, 91 transitions, 756 flow [2022-12-13 11:29:20,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=756, PETRI_PLACES=139, PETRI_TRANSITIONS=91} [2022-12-13 11:29:20,241 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 78 predicate places. [2022-12-13 11:29:20,242 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 91 transitions, 756 flow [2022-12-13 11:29:20,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:20,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:20,242 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 11:29:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:29:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:29:20,443 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:29:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1452408859, now seen corresponding path program 3 times [2022-12-13 11:29:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:29:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116871922] [2022-12-13 11:29:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:29:20,445 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 [2022-12-13 11:29:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:29:20,448 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:29:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:29:20,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:29:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:20,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:29:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:20,733 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:29:20,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:29:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:21,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:23,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:29:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116871922] [2022-12-13 11:29:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116871922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:23,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:29:23,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:29:23,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220393621] [2022-12-13 11:29:23,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:23,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:29:23,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:29:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:29:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:29:45,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 529 [2022-12-13 11:29:45,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 91 transitions, 756 flow. Second operand has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:45,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:45,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 529 [2022-12-13 11:29:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:23,056 INFO L130 PetriNetUnfolder]: 63023/86927 cut-off events. [2022-12-13 11:30:23,056 INFO L131 PetriNetUnfolder]: For 455403/473699 co-relation queries the response was YES. [2022-12-13 11:30:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424918 conditions, 86927 events. 63023/86927 cut-off events. For 455403/473699 co-relation queries the response was YES. Maximal size of possible extension queue 2218. Compared 574209 event pairs, 43901 based on Foata normal form. 16245/102959 useless extension candidates. Maximal degree in co-relation 424872. Up to 25377 conditions per place. [2022-12-13 11:30:23,964 INFO L137 encePairwiseOnDemand]: 525/529 looper letters, 706 selfloop transitions, 24 changer transitions 0/741 dead transitions. [2022-12-13 11:30:23,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 741 transitions, 6403 flow [2022-12-13 11:30:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:30:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:30:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5793 transitions. [2022-12-13 11:30:23,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45628544423440454 [2022-12-13 11:30:23,971 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5793 transitions. [2022-12-13 11:30:23,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5793 transitions. [2022-12-13 11:30:23,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:23,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5793 transitions. [2022-12-13 11:30:23,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 241.375) internal successors, (5793), 24 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:23,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 529.0) internal successors, (13225), 25 states have internal predecessors, (13225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:23,985 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 529.0) internal successors, (13225), 25 states have internal predecessors, (13225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:23,985 INFO L175 Difference]: Start difference. First operand has 139 places, 91 transitions, 756 flow. Second operand 24 states and 5793 transitions. [2022-12-13 11:30:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 741 transitions, 6403 flow [2022-12-13 11:30:25,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 741 transitions, 6359 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-12-13 11:30:25,694 INFO L231 Difference]: Finished difference. Result has 168 places, 104 transitions, 925 flow [2022-12-13 11:30:25,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=925, PETRI_PLACES=168, PETRI_TRANSITIONS=104} [2022-12-13 11:30:25,694 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 107 predicate places. [2022-12-13 11:30:25,694 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 104 transitions, 925 flow [2022-12-13 11:30:25,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:25,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:25,695 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:30:25,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:30:25,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:30:25,896 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:30:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1006106420, now seen corresponding path program 3 times [2022-12-13 11:30:25,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:30:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103679263] [2022-12-13 11:30:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:30:25,899 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 [2022-12-13 11:30:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:30:25,902 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:30:25,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:30:26,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:30:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:30:26,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 11:30:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:30:26,176 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:30:26,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:30:26,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-12-13 11:30:26,557 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 83 treesize of output 79 [2022-12-13 11:30:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:26,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:30:26,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:30:26,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-12-13 11:30:26,977 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 70 treesize of output 68 [2022-12-13 11:30:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:27,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:30:27,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103679263] [2022-12-13 11:30:27,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103679263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:30:27,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:30:27,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 11:30:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769521736] [2022-12-13 11:30:27,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:30:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:30:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:30:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:30:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:30:38,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 529 [2022-12-13 11:30:38,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 104 transitions, 925 flow. Second operand has 16 states, 16 states have (on average 202.625) internal successors, (3242), 16 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:38,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:38,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 529 [2022-12-13 11:30:38,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:05,912 INFO L130 PetriNetUnfolder]: 73839/101409 cut-off events. [2022-12-13 11:31:05,913 INFO L131 PetriNetUnfolder]: For 557913/570417 co-relation queries the response was YES. [2022-12-13 11:31:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493574 conditions, 101409 events. 73839/101409 cut-off events. For 557913/570417 co-relation queries the response was YES. Maximal size of possible extension queue 2525. Compared 685818 event pairs, 18557 based on Foata normal form. 13244/113441 useless extension candidates. Maximal degree in co-relation 493514. Up to 35136 conditions per place. [2022-12-13 11:31:07,322 INFO L137 encePairwiseOnDemand]: 520/529 looper letters, 361 selfloop transitions, 32 changer transitions 0/400 dead transitions. [2022-12-13 11:31:07,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 400 transitions, 3636 flow [2022-12-13 11:31:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:31:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:31:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4465 transitions. [2022-12-13 11:31:07,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4019263660095418 [2022-12-13 11:31:07,329 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4465 transitions. [2022-12-13 11:31:07,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4465 transitions. [2022-12-13 11:31:07,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:07,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4465 transitions. [2022-12-13 11:31:07,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 212.61904761904762) internal successors, (4465), 21 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:07,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 529.0) internal successors, (11638), 22 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:07,349 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 529.0) internal successors, (11638), 22 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:07,349 INFO L175 Difference]: Start difference. First operand has 168 places, 104 transitions, 925 flow. Second operand 21 states and 4465 transitions. [2022-12-13 11:31:07,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 400 transitions, 3636 flow [2022-12-13 11:31:12,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 400 transitions, 3588 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 11:31:12,291 INFO L231 Difference]: Finished difference. Result has 179 places, 108 transitions, 979 flow [2022-12-13 11:31:12,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=979, PETRI_PLACES=179, PETRI_TRANSITIONS=108} [2022-12-13 11:31:12,291 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 118 predicate places. [2022-12-13 11:31:12,291 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 108 transitions, 979 flow [2022-12-13 11:31:12,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 202.625) internal successors, (3242), 16 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:12,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:12,292 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:12,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-13 11:31:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:31:12,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:31:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:12,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1801947739, now seen corresponding path program 2 times [2022-12-13 11:31:12,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:31:12,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133245976] [2022-12-13 11:31:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:31:12,495 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 [2022-12-13 11:31:12,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:31:12,498 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:31:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:31:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:31:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:31:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:12,895 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:31:12,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:31:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:31:13,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:31:13,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:31:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133245976] [2022-12-13 11:31:13,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133245976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:13,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:13,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:31:13,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271810974] [2022-12-13 11:31:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:31:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:31:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:31:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:31:13,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 529 [2022-12-13 11:31:13,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 108 transitions, 979 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:13,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:13,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 529 [2022-12-13 11:31:13,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:30,749 INFO L130 PetriNetUnfolder]: 67215/94563 cut-off events. [2022-12-13 11:31:30,749 INFO L131 PetriNetUnfolder]: For 568448/587968 co-relation queries the response was YES. [2022-12-13 11:31:31,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465381 conditions, 94563 events. 67215/94563 cut-off events. For 568448/587968 co-relation queries the response was YES. Maximal size of possible extension queue 1945. Compared 631721 event pairs, 42731 based on Foata normal form. 25104/119526 useless extension candidates. Maximal degree in co-relation 465318. Up to 78895 conditions per place. [2022-12-13 11:31:32,042 INFO L137 encePairwiseOnDemand]: 523/529 looper letters, 127 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2022-12-13 11:31:32,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 152 transitions, 1618 flow [2022-12-13 11:31:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:31:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:31:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1114 transitions. [2022-12-13 11:31:32,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42117202268431003 [2022-12-13 11:31:32,045 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1114 transitions. [2022-12-13 11:31:32,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1114 transitions. [2022-12-13 11:31:32,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:32,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1114 transitions. [2022-12-13 11:31:32,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 529.0) internal successors, (3174), 6 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,049 INFO L175 Difference]: Start difference. First operand has 179 places, 108 transitions, 979 flow. Second operand 5 states and 1114 transitions. [2022-12-13 11:31:32,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 152 transitions, 1618 flow [2022-12-13 11:31:38,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 152 transitions, 1536 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-12-13 11:31:38,744 INFO L231 Difference]: Finished difference. Result has 170 places, 108 transitions, 973 flow [2022-12-13 11:31:38,745 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=170, PETRI_TRANSITIONS=108} [2022-12-13 11:31:38,745 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 109 predicate places. [2022-12-13 11:31:38,745 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 108 transitions, 973 flow [2022-12-13 11:31:38,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:38,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:38,745 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:38,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:31:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:31:38,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:31:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash -922575729, now seen corresponding path program 2 times [2022-12-13 11:31:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:31:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770106526] [2022-12-13 11:31:38,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:31:38,949 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 [2022-12-13 11:31:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:31:38,952 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:31:38,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:31:39,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:31:39,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:31:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:39,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:31:39,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:31:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:39,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:40,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:31:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770106526] [2022-12-13 11:31:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770106526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:40,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:31:40,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-12-13 11:31:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519739021] [2022-12-13 11:31:40,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:40,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:31:40,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:31:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:31:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:31:52,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 529 [2022-12-13 11:31:52,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 108 transitions, 973 flow. Second operand has 18 states, 18 states have (on average 210.55555555555554) internal successors, (3790), 18 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:52,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:52,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 529 [2022-12-13 11:31:52,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:20,621 INFO L130 PetriNetUnfolder]: 62615/88599 cut-off events. [2022-12-13 11:32:20,621 INFO L131 PetriNetUnfolder]: For 607473/631963 co-relation queries the response was YES. [2022-12-13 11:32:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445329 conditions, 88599 events. 62615/88599 cut-off events. For 607473/631963 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 615390 event pairs, 30135 based on Foata normal form. 22428/110718 useless extension candidates. Maximal degree in co-relation 445265. Up to 53392 conditions per place. [2022-12-13 11:32:21,885 INFO L137 encePairwiseOnDemand]: 520/529 looper letters, 464 selfloop transitions, 31 changer transitions 0/504 dead transitions. [2022-12-13 11:32:21,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 504 transitions, 4687 flow [2022-12-13 11:32:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:32:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:32:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4651 transitions. [2022-12-13 11:32:21,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41866954721397065 [2022-12-13 11:32:21,892 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4651 transitions. [2022-12-13 11:32:21,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4651 transitions. [2022-12-13 11:32:21,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:21,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4651 transitions. [2022-12-13 11:32:21,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 221.47619047619048) internal successors, (4651), 21 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:21,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 529.0) internal successors, (11638), 22 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:21,904 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 529.0) internal successors, (11638), 22 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:21,904 INFO L175 Difference]: Start difference. First operand has 170 places, 108 transitions, 973 flow. Second operand 21 states and 4651 transitions. [2022-12-13 11:32:21,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 504 transitions, 4687 flow [2022-12-13 11:32:24,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 504 transitions, 4552 flow, removed 42 selfloop flow, removed 3 redundant places. [2022-12-13 11:32:24,344 INFO L231 Difference]: Finished difference. Result has 189 places, 118 transitions, 1091 flow [2022-12-13 11:32:24,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1091, PETRI_PLACES=189, PETRI_TRANSITIONS=118} [2022-12-13 11:32:24,344 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 128 predicate places. [2022-12-13 11:32:24,344 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 118 transitions, 1091 flow [2022-12-13 11:32:24,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.55555555555554) internal successors, (3790), 18 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:24,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:24,345 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:24,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:32:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:32:24,546 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:32:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash 504922143, now seen corresponding path program 3 times [2022-12-13 11:32:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:32:24,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112154111] [2022-12-13 11:32:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:32:24,549 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 [2022-12-13 11:32:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:32:24,552 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:32:24,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:32:24,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:32:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:32:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:24,851 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:32:24,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:32:25,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 32 [2022-12-13 11:32:25,087 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 7 treesize of output 5 [2022-12-13 11:32:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:32:25,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:25,614 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 8 treesize of output 6 [2022-12-13 11:32:25,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 38 [2022-12-13 11:32:25,656 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 11:32:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:32:27,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:32:27,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112154111] [2022-12-13 11:32:27,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112154111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:27,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:32:27,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:32:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993215546] [2022-12-13 11:32:27,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:32:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:32:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:32:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:32:33,982 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] [2022-12-13 11:32:40,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 529 [2022-12-13 11:32:40,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 118 transitions, 1091 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:40,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:40,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 529 [2022-12-13 11:32:40,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:33:03,676 INFO L130 PetriNetUnfolder]: 78379/111225 cut-off events. [2022-12-13 11:33:03,676 INFO L131 PetriNetUnfolder]: For 645863/668181 co-relation queries the response was YES. [2022-12-13 11:33:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538076 conditions, 111225 events. 78379/111225 cut-off events. For 645863/668181 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 791361 event pairs, 12685 based on Foata normal form. 27008/138096 useless extension candidates. Maximal degree in co-relation 538009. Up to 37348 conditions per place. [2022-12-13 11:33:05,349 INFO L137 encePairwiseOnDemand]: 524/529 looper letters, 243 selfloop transitions, 22 changer transitions 0/272 dead transitions. [2022-12-13 11:33:05,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 272 transitions, 2898 flow [2022-12-13 11:33:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:33:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:33:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1557 transitions. [2022-12-13 11:33:05,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.420469889278963 [2022-12-13 11:33:05,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1557 transitions. [2022-12-13 11:33:05,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1557 transitions. [2022-12-13 11:33:05,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:33:05,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1557 transitions. [2022-12-13 11:33:05,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 222.42857142857142) internal successors, (1557), 7 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:05,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 529.0) internal successors, (4232), 8 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:05,357 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 529.0) internal successors, (4232), 8 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:05,358 INFO L175 Difference]: Start difference. First operand has 189 places, 118 transitions, 1091 flow. Second operand 7 states and 1557 transitions. [2022-12-13 11:33:05,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 272 transitions, 2898 flow [2022-12-13 11:33:10,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 272 transitions, 2823 flow, removed 24 selfloop flow, removed 8 redundant places. [2022-12-13 11:33:10,581 INFO L231 Difference]: Finished difference. Result has 187 places, 118 transitions, 1106 flow [2022-12-13 11:33:10,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=187, PETRI_TRANSITIONS=118} [2022-12-13 11:33:10,581 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 126 predicate places. [2022-12-13 11:33:10,581 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 118 transitions, 1106 flow [2022-12-13 11:33:10,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:10,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:33:10,582 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:33:10,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:33:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:33:10,785 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:33:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:33:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -940227034, now seen corresponding path program 4 times [2022-12-13 11:33:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:33:10,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727464738] [2022-12-13 11:33:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:33:10,788 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 [2022-12-13 11:33:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:33:10,791 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:33:10,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:33:10,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:33:10,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:33:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:33:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:33:11,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:33:11,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:33:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:33:11,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:33:12,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:33:12,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-12-13 11:33:12,057 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 70 treesize of output 68 [2022-12-13 11:33:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:33:13,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:33:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727464738] [2022-12-13 11:33:13,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727464738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:33:13,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:33:13,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 11:33:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135338867] [2022-12-13 11:33:13,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:33:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:33:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:33:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:33:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:33:30,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 529 [2022-12-13 11:33:30,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 118 transitions, 1106 flow. Second operand has 22 states, 22 states have (on average 210.36363636363637) internal successors, (4628), 22 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:30,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:33:30,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 529 [2022-12-13 11:33:30,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:34:13,555 INFO L130 PetriNetUnfolder]: 87751/125002 cut-off events. [2022-12-13 11:34:13,555 INFO L131 PetriNetUnfolder]: For 815451/840883 co-relation queries the response was YES. [2022-12-13 11:34:14,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629696 conditions, 125002 events. 87751/125002 cut-off events. For 815451/840883 co-relation queries the response was YES. Maximal size of possible extension queue 2757. Compared 892219 event pairs, 31245 based on Foata normal form. 27400/152346 useless extension candidates. Maximal degree in co-relation 629629. Up to 28860 conditions per place. [2022-12-13 11:34:15,443 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 822 selfloop transitions, 65 changer transitions 0/895 dead transitions. [2022-12-13 11:34:15,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 895 transitions, 8594 flow [2022-12-13 11:34:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 11:34:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 11:34:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9766 transitions. [2022-12-13 11:34:15,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41957380993297816 [2022-12-13 11:34:15,453 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9766 transitions. [2022-12-13 11:34:15,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9766 transitions. [2022-12-13 11:34:15,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:34:15,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9766 transitions. [2022-12-13 11:34:15,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 221.95454545454547) internal successors, (9766), 44 states have internal predecessors, (9766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:15,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 529.0) internal successors, (23805), 45 states have internal predecessors, (23805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:15,477 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 529.0) internal successors, (23805), 45 states have internal predecessors, (23805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:15,477 INFO L175 Difference]: Start difference. First operand has 187 places, 118 transitions, 1106 flow. Second operand 44 states and 9766 transitions. [2022-12-13 11:34:15,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 895 transitions, 8594 flow [2022-12-13 11:34:23,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 895 transitions, 8463 flow, removed 29 selfloop flow, removed 4 redundant places. [2022-12-13 11:34:23,820 INFO L231 Difference]: Finished difference. Result has 237 places, 154 transitions, 1697 flow [2022-12-13 11:34:23,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1697, PETRI_PLACES=237, PETRI_TRANSITIONS=154} [2022-12-13 11:34:23,820 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 176 predicate places. [2022-12-13 11:34:23,820 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 154 transitions, 1697 flow [2022-12-13 11:34:23,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 210.36363636363637) internal successors, (4628), 22 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:23,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:23,821 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:34:23,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 11:34:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:34:24,023 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:34:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2003511116, now seen corresponding path program 5 times [2022-12-13 11:34:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:34:24,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491823708] [2022-12-13 11:34:24,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:34:24,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:34:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:34:24,028 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:34:24,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:34:24,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:34:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:34:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 11:34:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:34:24,385 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:34:24,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:34:25,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-12-13 11:34:25,061 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 83 treesize of output 79 [2022-12-13 11:34:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:34:25,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:34:25,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:34:25,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-12-13 11:34:25,545 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 70 treesize of output 68 [2022-12-13 11:34:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:34:26,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:34:26,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491823708] [2022-12-13 11:34:26,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491823708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:34:26,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:34:26,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 11:34:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992671027] [2022-12-13 11:34:26,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:34:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:34:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:34:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:34:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:34:41,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 529 [2022-12-13 11:34:41,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 154 transitions, 1697 flow. Second operand has 18 states, 18 states have (on average 203.66666666666666) internal successors, (3666), 18 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:41,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:34:41,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 529 [2022-12-13 11:34:41,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:17,385 INFO L130 PetriNetUnfolder]: 85464/121707 cut-off events. [2022-12-13 11:35:17,385 INFO L131 PetriNetUnfolder]: For 910285/935385 co-relation queries the response was YES. [2022-12-13 11:35:18,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654023 conditions, 121707 events. 85464/121707 cut-off events. For 910285/935385 co-relation queries the response was YES. Maximal size of possible extension queue 2629. Compared 859101 event pairs, 43551 based on Foata normal form. 25354/146900 useless extension candidates. Maximal degree in co-relation 653945. Up to 75874 conditions per place. [2022-12-13 11:35:19,455 INFO L137 encePairwiseOnDemand]: 521/529 looper letters, 465 selfloop transitions, 25 changer transitions 0/498 dead transitions. [2022-12-13 11:35:19,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 498 transitions, 5171 flow [2022-12-13 11:35:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:35:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:35:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4689 transitions. [2022-12-13 11:35:19,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40290427908575355 [2022-12-13 11:35:19,462 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4689 transitions. [2022-12-13 11:35:19,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4689 transitions. [2022-12-13 11:35:19,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:19,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4689 transitions. [2022-12-13 11:35:19,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 213.13636363636363) internal successors, (4689), 22 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:19,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 529.0) internal successors, (12167), 23 states have internal predecessors, (12167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:19,473 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 529.0) internal successors, (12167), 23 states have internal predecessors, (12167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:19,473 INFO L175 Difference]: Start difference. First operand has 237 places, 154 transitions, 1697 flow. Second operand 22 states and 4689 transitions. [2022-12-13 11:35:19,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 498 transitions, 5171 flow [2022-12-13 11:35:24,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 498 transitions, 4980 flow, removed 41 selfloop flow, removed 26 redundant places. [2022-12-13 11:35:24,981 INFO L231 Difference]: Finished difference. Result has 233 places, 154 transitions, 1541 flow [2022-12-13 11:35:24,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1541, PETRI_PLACES=233, PETRI_TRANSITIONS=154} [2022-12-13 11:35:24,981 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 172 predicate places. [2022-12-13 11:35:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 154 transitions, 1541 flow [2022-12-13 11:35:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.66666666666666) internal successors, (3666), 18 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:24,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:24,982 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1] [2022-12-13 11:35:24,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:35:25,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:35:25,184 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:35:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1519463483, now seen corresponding path program 3 times [2022-12-13 11:35:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:25,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806659776] [2022-12-13 11:35:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:35:25,186 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 [2022-12-13 11:35:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:25,189 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:35:25,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:35:25,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:35:25,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:35:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:35:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:25,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:35:25,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:35:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:35:26,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:35:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:35:26,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806659776] [2022-12-13 11:35:26,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806659776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:35:26,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:35:26,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 11:35:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063745174] [2022-12-13 11:35:26,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:35:26,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:35:26,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:35:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:35:35,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 529 [2022-12-13 11:35:35,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 154 transitions, 1541 flow. Second operand has 16 states, 16 states have (on average 211.5625) internal successors, (3385), 16 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:35,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:35,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 529 [2022-12-13 11:35:35,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:57,622 INFO L130 PetriNetUnfolder]: 63977/91335 cut-off events. [2022-12-13 11:35:57,622 INFO L131 PetriNetUnfolder]: For 693577/713555 co-relation queries the response was YES. [2022-12-13 11:35:58,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497046 conditions, 91335 events. 63977/91335 cut-off events. For 693577/713555 co-relation queries the response was YES. Maximal size of possible extension queue 1965. Compared 630526 event pairs, 51134 based on Foata normal form. 17271/108351 useless extension candidates. Maximal degree in co-relation 496975. Up to 89007 conditions per place. [2022-12-13 11:35:58,998 INFO L137 encePairwiseOnDemand]: 522/529 looper letters, 224 selfloop transitions, 12 changer transitions 0/249 dead transitions. [2022-12-13 11:35:58,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 249 transitions, 2507 flow [2022-12-13 11:35:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:35:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:35:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2858 transitions. [2022-12-13 11:35:59,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4155881925258107 [2022-12-13 11:35:59,002 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2858 transitions. [2022-12-13 11:35:59,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2858 transitions. [2022-12-13 11:35:59,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:59,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2858 transitions. [2022-12-13 11:35:59,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.84615384615384) internal successors, (2858), 13 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:59,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 529.0) internal successors, (7406), 14 states have internal predecessors, (7406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:59,009 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 529.0) internal successors, (7406), 14 states have internal predecessors, (7406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:59,009 INFO L175 Difference]: Start difference. First operand has 233 places, 154 transitions, 1541 flow. Second operand 13 states and 2858 transitions. [2022-12-13 11:35:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 249 transitions, 2507 flow [2022-12-13 11:36:06,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 249 transitions, 2440 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-12-13 11:36:06,548 INFO L231 Difference]: Finished difference. Result has 237 places, 157 transitions, 1567 flow [2022-12-13 11:36:06,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1567, PETRI_PLACES=237, PETRI_TRANSITIONS=157} [2022-12-13 11:36:06,548 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 176 predicate places. [2022-12-13 11:36:06,548 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 157 transitions, 1567 flow [2022-12-13 11:36:06,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 211.5625) internal successors, (3385), 16 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:06,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:06,549 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 11:36:06,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:36:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:36:06,750 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:36:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 588991925, now seen corresponding path program 4 times [2022-12-13 11:36:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:06,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810734759] [2022-12-13 11:36:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:36:06,753 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 [2022-12-13 11:36:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:06,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:36:06,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:36:06,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:36:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:36:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:36:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:07,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:07,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:36:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:36:07,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:36:09,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810734759] [2022-12-13 11:36:09,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810734759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:09,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:09,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:36:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81115630] [2022-12-13 11:36:09,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:09,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:36:09,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:36:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:36:24,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 529 [2022-12-13 11:36:24,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 157 transitions, 1567 flow. Second operand has 18 states, 18 states have (on average 213.55555555555554) internal successors, (3844), 18 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:24,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:24,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 529 [2022-12-13 11:36:24,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:24,192 INFO L130 PetriNetUnfolder]: 158119/229842 cut-off events. [2022-12-13 11:37:24,192 INFO L131 PetriNetUnfolder]: For 1941950/1995933 co-relation queries the response was YES. [2022-12-13 11:37:27,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228395 conditions, 229842 events. 158119/229842 cut-off events. For 1941950/1995933 co-relation queries the response was YES. Maximal size of possible extension queue 4244. Compared 1812389 event pairs, 8820 based on Foata normal form. 56320/286076 useless extension candidates. Maximal degree in co-relation 1228320. Up to 50069 conditions per place. [2022-12-13 11:37:28,418 INFO L137 encePairwiseOnDemand]: 522/529 looper letters, 815 selfloop transitions, 48 changer transitions 0/876 dead transitions. [2022-12-13 11:37:28,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 876 transitions, 9886 flow [2022-12-13 11:37:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:37:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:37:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3410 transitions. [2022-12-13 11:37:28,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4297416509136736 [2022-12-13 11:37:28,425 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3410 transitions. [2022-12-13 11:37:28,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3410 transitions. [2022-12-13 11:37:28,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:28,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3410 transitions. [2022-12-13 11:37:28,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 227.33333333333334) internal successors, (3410), 15 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:37:28,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 529.0) internal successors, (8464), 16 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:37:28,433 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 529.0) internal successors, (8464), 16 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:37:28,433 INFO L175 Difference]: Start difference. First operand has 237 places, 157 transitions, 1567 flow. Second operand 15 states and 3410 transitions. [2022-12-13 11:37:28,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 876 transitions, 9886 flow [2022-12-13 11:37:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 876 transitions, 9871 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:37:38,698 INFO L231 Difference]: Finished difference. Result has 253 places, 172 transitions, 1893 flow [2022-12-13 11:37:38,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=529, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1893, PETRI_PLACES=253, PETRI_TRANSITIONS=172} [2022-12-13 11:37:38,699 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 192 predicate places. [2022-12-13 11:37:38,699 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 172 transitions, 1893 flow [2022-12-13 11:37:38,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.55555555555554) internal successors, (3844), 18 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:37:38,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:38,699 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:38,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 11:37:38,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:37:38,901 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:37:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -522180698, now seen corresponding path program 6 times [2022-12-13 11:37:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281213797] [2022-12-13 11:37:38,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:37:38,904 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 [2022-12-13 11:37:38,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:38,907 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 11:37:38,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60dc76eb-6943-405d-9909-1574a7a91f17/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 11:37:39,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 11:37:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:37:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:39,354 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:37:39,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:37:40,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-12-13 11:37:40,268 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 83 treesize of output 79 [2022-12-13 11:37:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:40,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:40,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:37:40,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-12-13 11:37:40,739 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 70 treesize of output 68 [2022-12-13 11:37:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:42,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281213797] [2022-12-13 11:37:42,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281213797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:42,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:42,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-12-13 11:37:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750632292] [2022-12-13 11:37:42,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:42,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:37:42,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:37:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-12-13 11:38:07,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 529 [2022-12-13 11:38:07,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 172 transitions, 1893 flow. Second operand has 26 states, 26 states have (on average 206.3846153846154) internal successors, (5366), 26 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:07,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:07,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 529 [2022-12-13 11:38:07,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand