./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.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_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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_478bf341-430d-4fa2-b295-eeceebab0113/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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- 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 11:34:50,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:34:50,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:34:50,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:34:50,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:34:50,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:34:50,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:34:50,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:34:50,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:34:50,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:34:50,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:34:50,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:34:50,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:34:50,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:34:50,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:34:50,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:34:50,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:34:50,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:34:50,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:34:50,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:34:50,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:34:50,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:34:50,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:34:50,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:34:50,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:34:50,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:34:50,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:34:50,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:34:50,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:34:50,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:34:50,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:34:50,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:34:50,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:34:50,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:34:50,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:34:50,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:34:50,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:34:50,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:34:50,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:34:50,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:34:50,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:34:50,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:34:50,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:34:50,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:34:50,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:34:50,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:34:50,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:34:50,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:34:50,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:34:50,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:34:50,904 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:34:50,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:34:50,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:34:50,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:34:50,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:34:50,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:34:50,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:34:50,907 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:34:50,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:34:50,907 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:34:50,907 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_478bf341-430d-4fa2-b295-eeceebab0113/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-12-13 11:34:51,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:34:51,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:34:51,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:34:51,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:34:51,093 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:34:51,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-12-13 11:34:53,691 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:34:53,845 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:34:53,845 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-12-13 11:34:53,851 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/968a750cf/0d3a2f3b52e54ff6b6ee38a05de55964/FLAG07202bda0 [2022-12-13 11:34:53,865 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/968a750cf/0d3a2f3b52e54ff6b6ee38a05de55964 [2022-12-13 11:34:53,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:34:53,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:34:53,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:53,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:34:53,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:34:53,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:53" (1/1) ... [2022-12-13 11:34:53,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff75db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:53, skipping insertion in model container [2022-12-13 11:34:53,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:53" (1/1) ... [2022-12-13 11:34:53,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:34:53,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:34:54,008 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_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-12-13 11:34:54,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:54,025 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 11:34:54,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54423e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:54, skipping insertion in model container [2022-12-13 11:34:54,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:54,027 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:34:54,028 INFO L158 Benchmark]: Toolchain (without parser) took 158.05ms. Allocated memory is still 138.4MB. Free memory was 104.9MB in the beginning and 95.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 11:34:54,029 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:34:54,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.74ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 95.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 11:34:54,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.74ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 95.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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_478bf341-430d-4fa2-b295-eeceebab0113/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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- 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 11:34:55,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:34:55,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:34:55,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:34:55,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:34:55,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:34:55,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:34:55,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:34:55,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:34:55,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:34:55,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:34:55,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:34:55,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:34:55,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:34:55,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:34:55,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:34:55,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:34:55,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:34:55,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:34:55,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:34:55,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:34:55,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:34:55,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:34:55,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:34:55,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:34:55,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:34:55,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:34:55,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:34:55,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:34:55,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:34:55,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:34:55,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:34:55,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:34:55,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:34:55,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:34:55,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:34:55,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:34:55,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:34:55,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:34:55,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:34:55,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:34:55,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:34:55,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:34:55,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:34:55,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:34:55,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:34:55,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:34:55,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:34:55,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:34:55,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:34:55,473 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:34:55,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:34:55,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:34:55,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:34:55,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:34:55,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:34:55,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:34:55,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:34:55,476 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:34:55,476 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:34:55,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:34:55,481 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:34:55,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:34:55,481 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:34:55,481 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:34:55,481 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_478bf341-430d-4fa2-b295-eeceebab0113/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-12-13 11:34:55,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:34:55,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:34:55,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:34:55,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:34:55,710 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:34:55,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-12-13 11:34:58,205 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:34:58,365 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:34:58,365 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-12-13 11:34:58,372 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/6f8631aa5/157dc7b373be48aca840bd65f132fdc7/FLAGdf1279820 [2022-12-13 11:34:58,383 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/data/6f8631aa5/157dc7b373be48aca840bd65f132fdc7 [2022-12-13 11:34:58,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:34:58,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:34:58,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:58,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:34:58,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:34:58,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165ae235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58, skipping insertion in model container [2022-12-13 11:34:58,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:34:58,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:34:58,530 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_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-12-13 11:34:58,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:58,547 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:34:58,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:34:58,556 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_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-12-13 11:34:58,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:58,562 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:34:58,576 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_478bf341-430d-4fa2-b295-eeceebab0113/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-12-13 11:34:58,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:58,589 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:34:58,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58 WrapperNode [2022-12-13 11:34:58,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:58,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:34:58,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:34:58,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:34:58,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,619 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 108 [2022-12-13 11:34:58,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:34:58,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:34:58,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:34:58,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:34:58,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:34:58,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:34:58,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:34:58,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:34:58,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (1/1) ... [2022-12-13 11:34:58,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:34:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:34:58,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:34:58,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:34:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:34:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:34:58,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:34:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:34:58,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:34:58,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:34:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:34:58,708 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 11:34:58,788 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:34:58,790 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:34:59,154 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:34:59,160 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:34:59,160 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:34:59,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:34:59 BoogieIcfgContainer [2022-12-13 11:34:59,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:34:59,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:34:59,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:34:59,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:34:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:34:58" (1/3) ... [2022-12-13 11:34:59,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a9b4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:34:59, skipping insertion in model container [2022-12-13 11:34:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:58" (2/3) ... [2022-12-13 11:34:59,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a9b4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:34:59, skipping insertion in model container [2022-12-13 11:34:59,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:34:59" (3/3) ... [2022-12-13 11:34:59,171 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-12-13 11:34:59,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:34:59,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-13 11:34:59,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:34:59,239 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:34:59,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 404 flow [2022-12-13 11:34:59,311 INFO L130 PetriNetUnfolder]: 15/192 cut-off events. [2022-12-13 11:34:59,311 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:34:59,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 15/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 232 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-13 11:34:59,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 194 transitions, 404 flow [2022-12-13 11:34:59,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 187 transitions, 386 flow [2022-12-13 11:34:59,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:34:59,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 187 transitions, 386 flow [2022-12-13 11:34:59,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 187 transitions, 386 flow [2022-12-13 11:34:59,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 187 transitions, 386 flow [2022-12-13 11:34:59,364 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-12-13 11:34:59,364 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:34:59,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 230 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-13 11:34:59,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-12-13 11:35:15,243 INFO L134 LiptonReduction]: Checked pairs total: 2641 [2022-12-13 11:35:15,244 INFO L136 LiptonReduction]: Total number of compositions: 205 [2022-12-13 11:35:15,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:35:15,261 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;@535ac8dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:35:15,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-12-13 11:35:15,264 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:35:15,264 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:35:15,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:15,265 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:35:15,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash 23214, now seen corresponding path program 1 times [2022-12-13 11:35:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41133016] [2022-12-13 11:35:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:15,280 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 11:35:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:15,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:15,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:35:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:15,464 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:35:15,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:35:15,497 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 11:35:15,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:15,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:15,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41133016] [2022-12-13 11:35:15,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41133016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:15,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:15,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:35:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317739829] [2022-12-13 11:35:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:15,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:15,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 399 [2022-12-13 11:35:15,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 11:35:15,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:15,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 399 [2022-12-13 11:35:15,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:16,211 INFO L130 PetriNetUnfolder]: 753/1213 cut-off events. [2022-12-13 11:35:16,211 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-13 11:35:16,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1213 events. 753/1213 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 5667 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 1106. Up to 609 conditions per place. [2022-12-13 11:35:16,219 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2022-12-13 11:35:16,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 324 flow [2022-12-13 11:35:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2022-12-13 11:35:16,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2022-12-13 11:35:16,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2022-12-13 11:35:16,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2022-12-13 11:35:16,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:16,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2022-12-13 11:35:16,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 11:35:16,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:16,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:16,245 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 589 transitions. [2022-12-13 11:35:16,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 324 flow [2022-12-13 11:35:16,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:35:16,249 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 114 flow [2022-12-13 11:35:16,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2022-12-13 11:35:16,253 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2022-12-13 11:35:16,253 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 114 flow [2022-12-13 11:35:16,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 11:35:16,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:16,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:35:16,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:16,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:16,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash 23213, now seen corresponding path program 1 times [2022-12-13 11:35:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035441719] [2022-12-13 11:35:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:16,460 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 11:35:16,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:16,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:16,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:35:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:16,574 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:35:16,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:35:16,584 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 11:35:16,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:16,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035441719] [2022-12-13 11:35:16,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035441719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:16,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:16,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:35:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075418715] [2022-12-13 11:35:16,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:16,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:16,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 399 [2022-12-13 11:35:16,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 11:35:16,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:16,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 399 [2022-12-13 11:35:16,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:16,984 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2022-12-13 11:35:16,984 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:35:16,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5818 event pairs, 574 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1214. Up to 1209 conditions per place. [2022-12-13 11:35:16,991 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 11:35:16,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 190 flow [2022-12-13 11:35:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-12-13 11:35:16,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2022-12-13 11:35:16,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-12-13 11:35:16,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-12-13 11:35:16,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:16,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-12-13 11:35:16,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 11:35:17,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:17,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:17,002 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 114 flow. Second operand 3 states and 549 transitions. [2022-12-13 11:35:17,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 190 flow [2022-12-13 11:35:17,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:35:17,003 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 104 flow [2022-12-13 11:35:17,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2022-12-13 11:35:17,004 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-12-13 11:35:17,004 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 104 flow [2022-12-13 11:35:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 11:35:17,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:17,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:35:17,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:17,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:17,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash 722977, now seen corresponding path program 1 times [2022-12-13 11:35:17,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902221136] [2022-12-13 11:35:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:17,207 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 11:35:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:17,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:17,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:35:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:17,323 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:35:17,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:35:17,381 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 11:35:17,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:35:17,578 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 11:35:17,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:17,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902221136] [2022-12-13 11:35:17,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902221136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:35:17,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:35:17,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:35:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377614964] [2022-12-13 11:35:17,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:35:17,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:35:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:35:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:35:18,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2022-12-13 11:35:18,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:18,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:18,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2022-12-13 11:35:18,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:20,055 INFO L130 PetriNetUnfolder]: 1137/1824 cut-off events. [2022-12-13 11:35:20,056 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:35:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 1824 events. 1137/1824 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9045 event pairs, 861 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 3687. Up to 608 conditions per place. [2022-12-13 11:35:20,061 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 98 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2022-12-13 11:35:20,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 117 transitions, 518 flow [2022-12-13 11:35:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:35:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:35:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1083 transitions. [2022-12-13 11:35:20,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-12-13 11:35:20,066 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1083 transitions. [2022-12-13 11:35:20,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1083 transitions. [2022-12-13 11:35:20,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:20,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1083 transitions. [2022-12-13 11:35:20,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 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 11:35:20,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 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 11:35:20,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 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 11:35:20,075 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 104 flow. Second operand 6 states and 1083 transitions. [2022-12-13 11:35:20,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 117 transitions, 518 flow [2022-12-13 11:35:20,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 117 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:20,078 INFO L231 Difference]: Finished difference. Result has 47 places, 55 transitions, 248 flow [2022-12-13 11:35:20,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=47, PETRI_TRANSITIONS=55} [2022-12-13 11:35:20,079 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-12-13 11:35:20,079 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 55 transitions, 248 flow [2022-12-13 11:35:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:20,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:20,080 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:35:20,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:20,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 724743, now seen corresponding path program 1 times [2022-12-13 11:35:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:20,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881888155] [2022-12-13 11:35:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:20,282 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 11:35:20,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:20,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:20,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:35:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:20,382 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 11:35:20,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 11:35:20,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:35:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:20,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 11:35:20,476 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 11:35:20,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:20,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881888155] [2022-12-13 11:35:20,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881888155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:20,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:20,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:35:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635987825] [2022-12-13 11:35:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:20,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:20,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2022-12-13 11:35:20,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 55 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 11:35:20,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:20,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2022-12-13 11:35:20,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:21,073 INFO L130 PetriNetUnfolder]: 865/1423 cut-off events. [2022-12-13 11:35:21,074 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:35:21,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 1423 events. 865/1423 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 7142 event pairs, 648 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 2935. Up to 1423 conditions per place. [2022-12-13 11:35:21,085 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 11:35:21,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 330 flow [2022-12-13 11:35:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-12-13 11:35:21,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644945697577276 [2022-12-13 11:35:21,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-12-13 11:35:21,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-12-13 11:35:21,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:21,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-12-13 11:35:21,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 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 11:35:21,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:21,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:21,093 INFO L175 Difference]: Start difference. First operand has 47 places, 55 transitions, 248 flow. Second operand 3 states and 556 transitions. [2022-12-13 11:35:21,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 330 flow [2022-12-13 11:35:21,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 311 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:21,096 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 211 flow [2022-12-13 11:35:21,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=211, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2022-12-13 11:35:21,097 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-12-13 11:35:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 211 flow [2022-12-13 11:35:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 11:35:21,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:21,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:35:21,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:21,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:21,299 INFO L85 PathProgramCache]: Analyzing trace with hash 724742, now seen corresponding path program 1 times [2022-12-13 11:35:21,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:21,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288627573] [2022-12-13 11:35:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:21,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:35:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:21,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:21,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:35:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:21,396 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 11:35:21,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 11:35:21,440 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:35:21,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:35:21,448 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 11:35:21,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:21,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:21,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288627573] [2022-12-13 11:35:21,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288627573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:21,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:21,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:35:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360907622] [2022-12-13 11:35:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:21,610 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 399 [2022-12-13 11:35:21,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 11:35:21,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:21,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 399 [2022-12-13 11:35:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:21,867 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2022-12-13 11:35:21,867 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:35:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1022 events. 593/1022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5047 event pairs, 435 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 2113. Up to 1022 conditions per place. [2022-12-13 11:35:21,872 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 46 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-12-13 11:35:21,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 285 flow [2022-12-13 11:35:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-12-13 11:35:21,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4628237259816207 [2022-12-13 11:35:21,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-12-13 11:35:21,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-12-13 11:35:21,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:21,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-12-13 11:35:21,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 11:35:21,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:21,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:21,877 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 211 flow. Second operand 3 states and 554 transitions. [2022-12-13 11:35:21,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 285 flow [2022-12-13 11:35:21,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:21,879 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 192 flow [2022-12-13 11:35:21,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-12-13 11:35:21,880 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-12-13 11:35:21,880 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 192 flow [2022-12-13 11:35:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 11:35:21,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:21,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:35:21,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 696494832, now seen corresponding path program 1 times [2022-12-13 11:35:22,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:22,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142994073] [2022-12-13 11:35:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:22,083 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 11:35:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:22,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:35:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:22,176 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:35:22,187 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 11:35:22,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:22,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:22,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142994073] [2022-12-13 11:35:22,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142994073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:22,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:22,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859757656] [2022-12-13 11:35:22,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:22,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 399 [2022-12-13 11:35:22,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 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 11:35:22,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:22,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 399 [2022-12-13 11:35:22,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:22,600 INFO L130 PetriNetUnfolder]: 455/788 cut-off events. [2022-12-13 11:35:22,600 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:35:22,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 788 events. 455/788 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3591 event pairs, 315 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 1642. Up to 770 conditions per place. [2022-12-13 11:35:22,602 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-12-13 11:35:22,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 278 flow [2022-12-13 11:35:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:35:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:35:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 689 transitions. [2022-12-13 11:35:22,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4317042606516291 [2022-12-13 11:35:22,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 689 transitions. [2022-12-13 11:35:22,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 689 transitions. [2022-12-13 11:35:22,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:22,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 689 transitions. [2022-12-13 11:35:22,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 11:35:22,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:22,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:22,607 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 192 flow. Second operand 4 states and 689 transitions. [2022-12-13 11:35:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 278 flow [2022-12-13 11:35:22,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:22,609 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 195 flow [2022-12-13 11:35:22,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-12-13 11:35:22,610 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-12-13 11:35:22,610 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 195 flow [2022-12-13 11:35:22,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 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 11:35:22,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:22,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:35:22,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:35:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 696494833, now seen corresponding path program 1 times [2022-12-13 11:35:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592992216] [2022-12-13 11:35:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:22,812 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 11:35:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:22,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:35:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:22,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:35:22,933 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 11:35:22,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:22,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592992216] [2022-12-13 11:35:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592992216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:22,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:22,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941292465] [2022-12-13 11:35:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:35:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:35:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:35:23,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 399 [2022-12-13 11:35:23,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 11:35:23,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:23,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 399 [2022-12-13 11:35:23,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:23,623 INFO L130 PetriNetUnfolder]: 842/1451 cut-off events. [2022-12-13 11:35:23,623 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 11:35:23,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 1451 events. 842/1451 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7900 event pairs, 264 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 2988. Up to 805 conditions per place. [2022-12-13 11:35:23,627 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 57 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2022-12-13 11:35:23,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 376 flow [2022-12-13 11:35:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:35:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:35:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2022-12-13 11:35:23,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4431077694235589 [2022-12-13 11:35:23,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2022-12-13 11:35:23,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2022-12-13 11:35:23,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:23,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2022-12-13 11:35:23,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 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 11:35:23,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:35:23,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:35:23,632 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 195 flow. Second operand 5 states and 884 transitions. [2022-12-13 11:35:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 376 flow [2022-12-13 11:35:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:35:23,634 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 220 flow [2022-12-13 11:35:23,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=5, PETRI_FLOW=220, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2022-12-13 11:35:23,634 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2022-12-13 11:35:23,634 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 220 flow [2022-12-13 11:35:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 11:35:23,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:23,635 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:35:23,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Ended with exit code 0 [2022-12-13 11:35:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:23,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash 696494719, now seen corresponding path program 1 times [2022-12-13 11:35:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705343819] [2022-12-13 11:35:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:35:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:23,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:23,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:35:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:24,042 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 11:35:24,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:24,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705343819] [2022-12-13 11:35:24,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705343819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:24,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:24,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:35:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496666078] [2022-12-13 11:35:24,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:24,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 399 [2022-12-13 11:35:24,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 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 11:35:24,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:24,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 399 [2022-12-13 11:35:24,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:24,624 INFO L130 PetriNetUnfolder]: 979/1747 cut-off events. [2022-12-13 11:35:24,624 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-12-13 11:35:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3818 conditions, 1747 events. 979/1747 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9874 event pairs, 729 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3801. Up to 1450 conditions per place. [2022-12-13 11:35:24,629 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 70 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-12-13 11:35:24,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 476 flow [2022-12-13 11:35:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:35:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:35:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2022-12-13 11:35:24,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4567669172932331 [2022-12-13 11:35:24,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2022-12-13 11:35:24,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2022-12-13 11:35:24,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:24,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2022-12-13 11:35:24,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 11:35:24,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:24,633 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:24,633 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 220 flow. Second operand 4 states and 729 transitions. [2022-12-13 11:35:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 476 flow [2022-12-13 11:35:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:35:24,635 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 217 flow [2022-12-13 11:35:24,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 11:35:24,635 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-12-13 11:35:24,636 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 217 flow [2022-12-13 11:35:24,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 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 11:35:24,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:24,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:35:24,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Ended with exit code 0 [2022-12-13 11:35:24,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:24,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash 696494859, now seen corresponding path program 1 times [2022-12-13 11:35:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:24,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743026531] [2022-12-13 11:35:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:24,838 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 11:35:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:24,839 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:24,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:35:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:24,958 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 11:35:24,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 11:35:24,969 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 42 treesize of output 38 [2022-12-13 11:35:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:35:25,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 11:35:25,049 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 11:35:25,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:25,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:25,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743026531] [2022-12-13 11:35:25,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743026531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:25,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:25,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:35:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119414845] [2022-12-13 11:35:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:25,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 399 [2022-12-13 11:35:25,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 11:35:25,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:25,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 399 [2022-12-13 11:35:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:25,629 INFO L130 PetriNetUnfolder]: 892/1576 cut-off events. [2022-12-13 11:35:25,629 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-12-13 11:35:25,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 1576 events. 892/1576 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8791 event pairs, 660 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 3639. Up to 1576 conditions per place. [2022-12-13 11:35:25,633 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 11:35:25,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 301 flow [2022-12-13 11:35:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2022-12-13 11:35:25,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.454469507101086 [2022-12-13 11:35:25,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2022-12-13 11:35:25,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2022-12-13 11:35:25,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:25,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2022-12-13 11:35:25,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 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 11:35:25,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:25,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:25,642 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 217 flow. Second operand 3 states and 544 transitions. [2022-12-13 11:35:25,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 301 flow [2022-12-13 11:35:25,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 295 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:25,643 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 209 flow [2022-12-13 11:35:25,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-12-13 11:35:25,644 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2022-12-13 11:35:25,644 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 209 flow [2022-12-13 11:35:25,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 11:35:25,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:25,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:35:25,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:25,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:25,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 696494858, now seen corresponding path program 1 times [2022-12-13 11:35:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376862820] [2022-12-13 11:35:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:25,849 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 11:35:25,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:25,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:35:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:25,968 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 11:35:25,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 11:35:25,989 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:35:25,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:35:25,997 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 11:35:25,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:25,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376862820] [2022-12-13 11:35:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376862820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:25,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:35:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050388048] [2022-12-13 11:35:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:26,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 399 [2022-12-13 11:35:26,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 11:35:26,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:26,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 399 [2022-12-13 11:35:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:26,341 INFO L130 PetriNetUnfolder]: 805/1405 cut-off events. [2022-12-13 11:35:26,341 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-12-13 11:35:26,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1405 events. 805/1405 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7586 event pairs, 591 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 3267. Up to 1405 conditions per place. [2022-12-13 11:35:26,347 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-12-13 11:35:26,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 289 flow [2022-12-13 11:35:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-12-13 11:35:26,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4527986633249791 [2022-12-13 11:35:26,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-12-13 11:35:26,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-12-13 11:35:26,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:26,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-12-13 11:35:26,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 11:35:26,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:26,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:35:26,351 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 209 flow. Second operand 3 states and 542 transitions. [2022-12-13 11:35:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 289 flow [2022-12-13 11:35:26,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:26,352 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 206 flow [2022-12-13 11:35:26,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 11:35:26,358 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-12-13 11:35:26,358 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 206 flow [2022-12-13 11:35:26,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 11:35:26,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:26,359 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:35:26,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:26,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:26,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash 68297772, now seen corresponding path program 1 times [2022-12-13 11:35:26,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:26,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35977931] [2022-12-13 11:35:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:26,561 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 11:35:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:26,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:26,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:35:26,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:26,734 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 11:35:26,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:26,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35977931] [2022-12-13 11:35:26,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35977931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:26,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:26,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118504329] [2022-12-13 11:35:26,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:26,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:35:26,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:35:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:35:26,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 399 [2022-12-13 11:35:26,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 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 11:35:26,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:26,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 399 [2022-12-13 11:35:26,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:27,317 INFO L130 PetriNetUnfolder]: 606/1086 cut-off events. [2022-12-13 11:35:27,317 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 11:35:27,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 1086 events. 606/1086 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5377 event pairs, 252 based on Foata normal form. 12/697 useless extension candidates. Maximal degree in co-relation 2512. Up to 501 conditions per place. [2022-12-13 11:35:27,320 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 65 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2022-12-13 11:35:27,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 438 flow [2022-12-13 11:35:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:35:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:35:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2022-12-13 11:35:27,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506265664160401 [2022-12-13 11:35:27,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2022-12-13 11:35:27,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2022-12-13 11:35:27,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:27,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2022-12-13 11:35:27,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.8) internal successors, (899), 5 states have internal predecessors, (899), 0 states have call successors, (0), 0 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 11:35:27,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:35:27,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:35:27,327 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 206 flow. Second operand 5 states and 899 transitions. [2022-12-13 11:35:27,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 438 flow [2022-12-13 11:35:27,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:27,329 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 248 flow [2022-12-13 11:35:27,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-13 11:35:27,330 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2022-12-13 11:35:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 248 flow [2022-12-13 11:35:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 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 11:35:27,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:27,330 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:35:27,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:27,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 66690926, now seen corresponding path program 2 times [2022-12-13 11:35:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201417361] [2022-12-13 11:35:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:35:27,535 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 11:35:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:27,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:35:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:35:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:35:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:27,693 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:35:27,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:35:27,807 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 11:35:27,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:35:28,410 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 11:35:28,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201417361] [2022-12-13 11:35:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201417361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:35:28,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:35:28,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:35:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213857875] [2022-12-13 11:35:28,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:35:28,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:35:28,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:35:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:35:33,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 399 [2022-12-13 11:35:33,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 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 11:35:33,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:33,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 399 [2022-12-13 11:35:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:36,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:35:38,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:35:39,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:35:41,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:35:43,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:35:47,252 INFO L130 PetriNetUnfolder]: 2200/3860 cut-off events. [2022-12-13 11:35:47,252 INFO L131 PetriNetUnfolder]: For 728/728 co-relation queries the response was YES. [2022-12-13 11:35:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9600 conditions, 3860 events. 2200/3860 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24098 event pairs, 1630 based on Foata normal form. 16/2420 useless extension candidates. Maximal degree in co-relation 9577. Up to 577 conditions per place. [2022-12-13 11:35:47,265 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 196 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2022-12-13 11:35:47,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 227 transitions, 1372 flow [2022-12-13 11:35:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:35:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:35:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2174 transitions. [2022-12-13 11:35:47,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4540517961570593 [2022-12-13 11:35:47,275 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2174 transitions. [2022-12-13 11:35:47,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2174 transitions. [2022-12-13 11:35:47,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:47,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2174 transitions. [2022-12-13 11:35:47,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 181.16666666666666) internal successors, (2174), 12 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 11:35:47,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:35:47,282 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:35:47,282 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 248 flow. Second operand 12 states and 2174 transitions. [2022-12-13 11:35:47,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 227 transitions, 1372 flow [2022-12-13 11:35:47,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 227 transitions, 1344 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 11:35:47,287 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 480 flow [2022-12-13 11:35:47,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=480, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 11:35:47,288 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2022-12-13 11:35:47,288 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 480 flow [2022-12-13 11:35:47,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 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 11:35:47,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:47,289 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:47,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:35:47,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:47,490 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash -683324713, now seen corresponding path program 1 times [2022-12-13 11:35:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863562956] [2022-12-13 11:35:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:47,493 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 11:35:47,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:47,496 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:47,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:35:47,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:47,637 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 11:35:47,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:47,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863562956] [2022-12-13 11:35:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863562956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:47,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:35:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048827921] [2022-12-13 11:35:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:47,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 399 [2022-12-13 11:35:47,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 480 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 11:35:47,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:47,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 399 [2022-12-13 11:35:47,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:48,387 INFO L130 PetriNetUnfolder]: 1984/3482 cut-off events. [2022-12-13 11:35:48,387 INFO L131 PetriNetUnfolder]: For 1069/1069 co-relation queries the response was YES. [2022-12-13 11:35:48,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8833 conditions, 3482 events. 1984/3482 cut-off events. For 1069/1069 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20876 event pairs, 1468 based on Foata normal form. 0/2242 useless extension candidates. Maximal degree in co-relation 8803. Up to 3217 conditions per place. [2022-12-13 11:35:48,396 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 84 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2022-12-13 11:35:48,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 842 flow [2022-12-13 11:35:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:35:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:35:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 718 transitions. [2022-12-13 11:35:48,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.449874686716792 [2022-12-13 11:35:48,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 718 transitions. [2022-12-13 11:35:48,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 718 transitions. [2022-12-13 11:35:48,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:48,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 718 transitions. [2022-12-13 11:35:48,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 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 11:35:48,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:48,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:48,401 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 480 flow. Second operand 4 states and 718 transitions. [2022-12-13 11:35:48,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 842 flow [2022-12-13 11:35:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 759 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-12-13 11:35:48,405 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 434 flow [2022-12-13 11:35:48,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 11:35:48,405 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2022-12-13 11:35:48,405 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 434 flow [2022-12-13 11:35:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 11:35:48,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:48,405 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:48,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:48,606 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2116634913, now seen corresponding path program 1 times [2022-12-13 11:35:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860281909] [2022-12-13 11:35:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:48,608 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 11:35:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:48,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:48,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:35:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:48,755 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:35:48,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:35:48,773 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:35:48,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:35:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:35:48,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:35:48,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860281909] [2022-12-13 11:35:48,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860281909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:48,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:48,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:35:48,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130617131] [2022-12-13 11:35:48,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:48,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:35:48,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:35:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:35:49,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 399 [2022-12-13 11:35:49,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 434 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 11:35:49,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:49,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 399 [2022-12-13 11:35:49,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:49,456 INFO L130 PetriNetUnfolder]: 1426/2550 cut-off events. [2022-12-13 11:35:49,456 INFO L131 PetriNetUnfolder]: For 1021/1021 co-relation queries the response was YES. [2022-12-13 11:35:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 2550 events. 1426/2550 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14724 event pairs, 990 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 6857. Up to 2537 conditions per place. [2022-12-13 11:35:49,464 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 47 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2022-12-13 11:35:49,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 542 flow [2022-12-13 11:35:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:35:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:35:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2022-12-13 11:35:49,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2022-12-13 11:35:49,465 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2022-12-13 11:35:49,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2022-12-13 11:35:49,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:49,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2022-12-13 11:35:49,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 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 11:35:49,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:49,468 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:35:49,468 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 434 flow. Second operand 4 states and 683 transitions. [2022-12-13 11:35:49,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 542 flow [2022-12-13 11:35:49,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:35:49,472 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 443 flow [2022-12-13 11:35:49,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=443, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2022-12-13 11:35:49,472 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2022-12-13 11:35:49,472 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 443 flow [2022-12-13 11:35:49,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 11:35:49,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:49,473 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:49,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:49,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:49,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:35:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2116634914, now seen corresponding path program 1 times [2022-12-13 11:35:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:35:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84026267] [2022-12-13 11:35:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:49,674 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 11:35:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:35:49,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:49,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:35:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:35:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:35:49,824 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:35:49,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:35:49,896 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 11:35:49,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 11:35:50,156 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 11:35:50,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:35:50,957 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 11:35:50,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:35:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84026267] [2022-12-13 11:35:50,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84026267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:35:50,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:35:50,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:35:50,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588036858] [2022-12-13 11:35:50,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:35:50,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:35:50,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:35:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:35:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:35:56,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 399 [2022-12-13 11:35:56,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 443 flow. Second operand has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 0 states have call successors, (0), 0 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 11:35:56,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:56,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 399 [2022-12-13 11:35:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:02,604 INFO L130 PetriNetUnfolder]: 2004/3707 cut-off events. [2022-12-13 11:36:02,604 INFO L131 PetriNetUnfolder]: For 1371/1371 co-relation queries the response was YES. [2022-12-13 11:36:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9894 conditions, 3707 events. 2004/3707 cut-off events. For 1371/1371 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24450 event pairs, 684 based on Foata normal form. 0/2959 useless extension candidates. Maximal degree in co-relation 9862. Up to 883 conditions per place. [2022-12-13 11:36:02,614 INFO L137 encePairwiseOnDemand]: 387/399 looper letters, 169 selfloop transitions, 44 changer transitions 0/213 dead transitions. [2022-12-13 11:36:02,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 213 transitions, 1473 flow [2022-12-13 11:36:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:36:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:36:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3356 transitions. [2022-12-13 11:36:02,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4005251223296336 [2022-12-13 11:36:02,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3356 transitions. [2022-12-13 11:36:02,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3356 transitions. [2022-12-13 11:36:02,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:02,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3356 transitions. [2022-12-13 11:36:02,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 159.8095238095238) internal successors, (3356), 21 states have internal predecessors, (3356), 0 states have call successors, (0), 0 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 11:36:02,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 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 11:36:02,631 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 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 11:36:02,631 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 443 flow. Second operand 21 states and 3356 transitions. [2022-12-13 11:36:02,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 213 transitions, 1473 flow [2022-12-13 11:36:02,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 213 transitions, 1460 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:36:02,638 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 810 flow [2022-12-13 11:36:02,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=810, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2022-12-13 11:36:02,638 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2022-12-13 11:36:02,638 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 810 flow [2022-12-13 11:36:02,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 0 states have call successors, (0), 0 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 11:36:02,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:02,639 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:02,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:02,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1209797920, now seen corresponding path program 1 times [2022-12-13 11:36:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:02,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155802329] [2022-12-13 11:36:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:36:02,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:02,841 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:02,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:36:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:02,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:36:02,994 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 11:36:02,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:02,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155802329] [2022-12-13 11:36:02,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155802329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:02,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:02,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:36:02,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120453678] [2022-12-13 11:36:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:36:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:36:02,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:36:03,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 399 [2022-12-13 11:36:03,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 810 flow. Second operand has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 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 11:36:03,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:03,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 399 [2022-12-13 11:36:03,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:04,261 INFO L130 PetriNetUnfolder]: 3207/5822 cut-off events. [2022-12-13 11:36:04,261 INFO L131 PetriNetUnfolder]: For 9856/9856 co-relation queries the response was YES. [2022-12-13 11:36:04,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18306 conditions, 5822 events. 3207/5822 cut-off events. For 9856/9856 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40190 event pairs, 1059 based on Foata normal form. 0/5534 useless extension candidates. Maximal degree in co-relation 18268. Up to 3151 conditions per place. [2022-12-13 11:36:04,279 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 75 selfloop transitions, 31 changer transitions 0/106 dead transitions. [2022-12-13 11:36:04,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 1132 flow [2022-12-13 11:36:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:36:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:36:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 870 transitions. [2022-12-13 11:36:04,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43609022556390975 [2022-12-13 11:36:04,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 870 transitions. [2022-12-13 11:36:04,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 870 transitions. [2022-12-13 11:36:04,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:04,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 870 transitions. [2022-12-13 11:36:04,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 11:36:04,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:36:04,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:36:04,284 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 810 flow. Second operand 5 states and 870 transitions. [2022-12-13 11:36:04,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 1132 flow [2022-12-13 11:36:04,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 106 transitions, 1043 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-13 11:36:04,302 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 822 flow [2022-12-13 11:36:04,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=822, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2022-12-13 11:36:04,302 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2022-12-13 11:36:04,302 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 822 flow [2022-12-13 11:36:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 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 11:36:04,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:04,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:04,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:04,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:04,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1209797957, now seen corresponding path program 1 times [2022-12-13 11:36:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483316987] [2022-12-13 11:36:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:04,504 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 11:36:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:04,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:04,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:36:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:04,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:36:04,695 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 11:36:04,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:04,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483316987] [2022-12-13 11:36:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483316987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:04,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:36:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629114779] [2022-12-13 11:36:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:36:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:36:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:36:05,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 399 [2022-12-13 11:36:05,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 822 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 11:36:05,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:05,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 399 [2022-12-13 11:36:05,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:06,174 INFO L130 PetriNetUnfolder]: 3135/5686 cut-off events. [2022-12-13 11:36:06,174 INFO L131 PetriNetUnfolder]: For 10171/10171 co-relation queries the response was YES. [2022-12-13 11:36:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18638 conditions, 5686 events. 3135/5686 cut-off events. For 10171/10171 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 38966 event pairs, 1047 based on Foata normal form. 24/5710 useless extension candidates. Maximal degree in co-relation 18599. Up to 3039 conditions per place. [2022-12-13 11:36:06,192 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 94 selfloop transitions, 21 changer transitions 0/115 dead transitions. [2022-12-13 11:36:06,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 115 transitions, 1160 flow [2022-12-13 11:36:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:36:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:36:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2022-12-13 11:36:06,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2022-12-13 11:36:06,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2022-12-13 11:36:06,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2022-12-13 11:36:06,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:06,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2022-12-13 11:36:06,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 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 11:36:06,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:36:06,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 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 11:36:06,197 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 822 flow. Second operand 5 states and 865 transitions. [2022-12-13 11:36:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 115 transitions, 1160 flow [2022-12-13 11:36:06,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 115 transitions, 1118 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:06,211 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 818 flow [2022-12-13 11:36:06,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=818, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2022-12-13 11:36:06,212 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2022-12-13 11:36:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 818 flow [2022-12-13 11:36:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 11:36:06,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:06,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:36:06,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:06,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:06,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash -252162560, now seen corresponding path program 2 times [2022-12-13 11:36:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021297519] [2022-12-13 11:36:06,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:36:06,416 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 11:36:06,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:06,419 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:06,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:06,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:36:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:36:06,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:36:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:06,578 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:36:06,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:36:06,631 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:36:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:36:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:06,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:36:06,713 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:36:06,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:36:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:36:06,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:06,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021297519] [2022-12-13 11:36:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021297519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:06,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:06,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:36:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866371600] [2022-12-13 11:36:06,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:36:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:36:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:36:07,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 399 [2022-12-13 11:36:07,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 818 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 11:36:07,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:07,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 399 [2022-12-13 11:36:07,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:07,998 INFO L130 PetriNetUnfolder]: 2951/5374 cut-off events. [2022-12-13 11:36:07,998 INFO L131 PetriNetUnfolder]: For 11647/11647 co-relation queries the response was YES. [2022-12-13 11:36:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17719 conditions, 5374 events. 2951/5374 cut-off events. For 11647/11647 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 36490 event pairs, 1059 based on Foata normal form. 128/5502 useless extension candidates. Maximal degree in co-relation 17679. Up to 2801 conditions per place. [2022-12-13 11:36:08,015 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2022-12-13 11:36:08,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 101 transitions, 1073 flow [2022-12-13 11:36:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:36:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:36:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-12-13 11:36:08,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2022-12-13 11:36:08,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-12-13 11:36:08,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-12-13 11:36:08,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:08,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-12-13 11:36:08,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 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 11:36:08,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:36:08,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 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 11:36:08,019 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 818 flow. Second operand 4 states and 693 transitions. [2022-12-13 11:36:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 101 transitions, 1073 flow [2022-12-13 11:36:08,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 1046 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 11:36:08,037 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 840 flow [2022-12-13 11:36:08,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2022-12-13 11:36:08,037 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2022-12-13 11:36:08,037 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 840 flow [2022-12-13 11:36:08,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 11:36:08,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:08,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:08,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:08,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:08,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1728198406, now seen corresponding path program 1 times [2022-12-13 11:36:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:08,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291381769] [2022-12-13 11:36:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:08,241 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 11:36:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:08,244 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:08,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:36:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:08,451 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:36:08,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:36:08,498 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:36:08,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:36:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:08,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:36:08,598 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:36:08,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:36:08,672 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 11:36:08,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:11,142 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 11:36:11,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291381769] [2022-12-13 11:36:11,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291381769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:11,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:11,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:36:11,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885517772] [2022-12-13 11:36:11,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:36:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:36:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:36:13,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 399 [2022-12-13 11:36:13,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 840 flow. Second operand has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 11:36:13,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:13,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 399 [2022-12-13 11:36:13,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:20,108 INFO L130 PetriNetUnfolder]: 4334/7986 cut-off events. [2022-12-13 11:36:20,108 INFO L131 PetriNetUnfolder]: For 15772/15772 co-relation queries the response was YES. [2022-12-13 11:36:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 7986 events. 4334/7986 cut-off events. For 15772/15772 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 59147 event pairs, 2061 based on Foata normal form. 412/8398 useless extension candidates. Maximal degree in co-relation 25750. Up to 3271 conditions per place. [2022-12-13 11:36:20,134 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 197 selfloop transitions, 41 changer transitions 0/238 dead transitions. [2022-12-13 11:36:20,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 238 transitions, 2071 flow [2022-12-13 11:36:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:36:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 11:36:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2578 transitions. [2022-12-13 11:36:20,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40382205513784464 [2022-12-13 11:36:20,139 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2578 transitions. [2022-12-13 11:36:20,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2578 transitions. [2022-12-13 11:36:20,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:20,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2578 transitions. [2022-12-13 11:36:20,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.125) internal successors, (2578), 16 states have internal predecessors, (2578), 0 states have call successors, (0), 0 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 11:36:20,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:36:20,146 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:36:20,146 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 840 flow. Second operand 16 states and 2578 transitions. [2022-12-13 11:36:20,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 238 transitions, 2071 flow [2022-12-13 11:36:20,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 238 transitions, 1974 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-12-13 11:36:20,179 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 1030 flow [2022-12-13 11:36:20,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1030, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2022-12-13 11:36:20,180 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2022-12-13 11:36:20,180 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 1030 flow [2022-12-13 11:36:20,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 11:36:20,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:20,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:20,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Ended with exit code 0 [2022-12-13 11:36:20,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:20,381 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1728326215, now seen corresponding path program 1 times [2022-12-13 11:36:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:20,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931947658] [2022-12-13 11:36:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:20,383 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 11:36:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:20,386 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:20,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:36:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:20,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:20,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:20,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931947658] [2022-12-13 11:36:20,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931947658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:20,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:20,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:36:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971049625] [2022-12-13 11:36:20,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:20,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:36:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:36:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:36:21,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 399 [2022-12-13 11:36:21,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 1030 flow. Second operand has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 0 states have call successors, (0), 0 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 11:36:21,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:21,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 399 [2022-12-13 11:36:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:23,316 INFO L130 PetriNetUnfolder]: 4286/7994 cut-off events. [2022-12-13 11:36:23,316 INFO L131 PetriNetUnfolder]: For 23555/23555 co-relation queries the response was YES. [2022-12-13 11:36:23,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28231 conditions, 7994 events. 4286/7994 cut-off events. For 23555/23555 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 60281 event pairs, 1476 based on Foata normal form. 360/8354 useless extension candidates. Maximal degree in co-relation 28188. Up to 3432 conditions per place. [2022-12-13 11:36:23,344 INFO L137 encePairwiseOnDemand]: 389/399 looper letters, 146 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2022-12-13 11:36:23,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 1786 flow [2022-12-13 11:36:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:36:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:36:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1558 transitions. [2022-12-13 11:36:23,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2022-12-13 11:36:23,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1558 transitions. [2022-12-13 11:36:23,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1558 transitions. [2022-12-13 11:36:23,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:23,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1558 transitions. [2022-12-13 11:36:23,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 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 11:36:23,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:23,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:23,351 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 1030 flow. Second operand 9 states and 1558 transitions. [2022-12-13 11:36:23,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 1786 flow [2022-12-13 11:36:23,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 1733 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-12-13 11:36:23,395 INFO L231 Difference]: Finished difference. Result has 115 places, 101 transitions, 1135 flow [2022-12-13 11:36:23,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1135, PETRI_PLACES=115, PETRI_TRANSITIONS=101} [2022-12-13 11:36:23,395 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2022-12-13 11:36:23,395 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 101 transitions, 1135 flow [2022-12-13 11:36:23,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 0 states have call successors, (0), 0 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 11:36:23,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:23,396 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:23,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:23,596 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash 791392599, now seen corresponding path program 1 times [2022-12-13 11:36:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:23,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832831915] [2022-12-13 11:36:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:23,597 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 11:36:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:23,598 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:23,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:23,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:36:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:23,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:36:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:36:23,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:36:24,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832831915] [2022-12-13 11:36:24,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832831915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:24,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:24,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:36:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483791872] [2022-12-13 11:36:24,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:36:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:36:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:36:28,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 399 [2022-12-13 11:36:28,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 101 transitions, 1135 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 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 11:36:28,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:28,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 399 [2022-12-13 11:36:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:32,755 INFO L130 PetriNetUnfolder]: 8708/15948 cut-off events. [2022-12-13 11:36:32,755 INFO L131 PetriNetUnfolder]: For 51558/51558 co-relation queries the response was YES. [2022-12-13 11:36:32,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57883 conditions, 15948 events. 8708/15948 cut-off events. For 51558/51558 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 126456 event pairs, 468 based on Foata normal form. 528/16476 useless extension candidates. Maximal degree in co-relation 57837. Up to 3618 conditions per place. [2022-12-13 11:36:32,833 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 140 selfloop transitions, 51 changer transitions 0/191 dead transitions. [2022-12-13 11:36:32,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 191 transitions, 2010 flow [2022-12-13 11:36:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:36:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:36:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1561 transitions. [2022-12-13 11:36:32,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346978557504873 [2022-12-13 11:36:32,837 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1561 transitions. [2022-12-13 11:36:32,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1561 transitions. [2022-12-13 11:36:32,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:32,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1561 transitions. [2022-12-13 11:36:32,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.44444444444446) internal successors, (1561), 9 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 11:36:32,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:32,843 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:32,843 INFO L175 Difference]: Start difference. First operand has 115 places, 101 transitions, 1135 flow. Second operand 9 states and 1561 transitions. [2022-12-13 11:36:32,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 191 transitions, 2010 flow [2022-12-13 11:36:32,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 191 transitions, 2005 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:32,925 INFO L231 Difference]: Finished difference. Result has 127 places, 113 transitions, 1395 flow [2022-12-13 11:36:32,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1395, PETRI_PLACES=127, PETRI_TRANSITIONS=113} [2022-12-13 11:36:32,925 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2022-12-13 11:36:32,925 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 113 transitions, 1395 flow [2022-12-13 11:36:32,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 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 11:36:32,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:32,926 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:32,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:33,127 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2034540043, now seen corresponding path program 1 times [2022-12-13 11:36:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995680843] [2022-12-13 11:36:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:33,130 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 11:36:33,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:33,133 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:33,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:36:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:33,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:33,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995680843] [2022-12-13 11:36:33,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995680843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:33,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:33,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:36:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567923748] [2022-12-13 11:36:33,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:36:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:36:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:36:34,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 399 [2022-12-13 11:36:34,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 113 transitions, 1395 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 11:36:34,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:34,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 399 [2022-12-13 11:36:34,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:37,385 INFO L130 PetriNetUnfolder]: 8216/15172 cut-off events. [2022-12-13 11:36:37,385 INFO L131 PetriNetUnfolder]: For 61395/61395 co-relation queries the response was YES. [2022-12-13 11:36:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60605 conditions, 15172 events. 8216/15172 cut-off events. For 61395/61395 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 121689 event pairs, 3604 based on Foata normal form. 336/15508 useless extension candidates. Maximal degree in co-relation 60553. Up to 7210 conditions per place. [2022-12-13 11:36:37,457 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 148 selfloop transitions, 29 changer transitions 0/177 dead transitions. [2022-12-13 11:36:37,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 177 transitions, 2102 flow [2022-12-13 11:36:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:36:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:36:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1553 transitions. [2022-12-13 11:36:37,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4324700640490114 [2022-12-13 11:36:37,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1553 transitions. [2022-12-13 11:36:37,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1553 transitions. [2022-12-13 11:36:37,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:37,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1553 transitions. [2022-12-13 11:36:37,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.55555555555554) internal successors, (1553), 9 states have internal predecessors, (1553), 0 states have call successors, (0), 0 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 11:36:37,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:37,465 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:36:37,465 INFO L175 Difference]: Start difference. First operand has 127 places, 113 transitions, 1395 flow. Second operand 9 states and 1553 transitions. [2022-12-13 11:36:37,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 177 transitions, 2102 flow [2022-12-13 11:36:37,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 2017 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:37,830 INFO L231 Difference]: Finished difference. Result has 133 places, 112 transitions, 1379 flow [2022-12-13 11:36:37,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1379, PETRI_PLACES=133, PETRI_TRANSITIONS=112} [2022-12-13 11:36:37,831 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2022-12-13 11:36:37,831 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 112 transitions, 1379 flow [2022-12-13 11:36:37,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 11:36:37,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:37,832 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:37,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Ended with exit code 0 [2022-12-13 11:36:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:38,033 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:36:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash 791392486, now seen corresponding path program 2 times [2022-12-13 11:36:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3254] [2022-12-13 11:36:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:36:38,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:36:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:38,038 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:38,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:36:38,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:36:38,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:36:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:36:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:38,207 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 11:36:38,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 11:36:38,245 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:36:38,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:36:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:38,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:36:38,325 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:36:38,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:36:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:38,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:36:41,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:41,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3254] [2022-12-13 11:36:41,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:41,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:41,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:36:41,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272223320] [2022-12-13 11:36:41,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:36:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:41,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:36:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:36:43,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:36:45,469 WARN L539 Checker$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 11:36:47,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:36:50,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:36:52,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:36:54,724 WARN L539 Checker$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 11:36:56,741 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 11:37:02,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 399 [2022-12-13 11:37:02,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 112 transitions, 1379 flow. Second operand has 12 states, 12 states have (on average 149.66666666666666) internal successors, (1796), 12 states have internal predecessors, (1796), 0 states have call successors, (0), 0 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 11:37:02,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:02,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 399 [2022-12-13 11:37:02,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:07,163 INFO L130 PetriNetUnfolder]: 7984/14844 cut-off events. [2022-12-13 11:37:07,163 INFO L131 PetriNetUnfolder]: For 74419/74419 co-relation queries the response was YES. [2022-12-13 11:37:07,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60885 conditions, 14844 events. 7984/14844 cut-off events. For 74419/74419 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 119703 event pairs, 1192 based on Foata normal form. 176/15020 useless extension candidates. Maximal degree in co-relation 60831. Up to 5435 conditions per place. [2022-12-13 11:37:07,236 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 239 selfloop transitions, 37 changer transitions 0/276 dead transitions. [2022-12-13 11:37:07,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 276 transitions, 2794 flow [2022-12-13 11:37:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:37:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:37:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2262 transitions. [2022-12-13 11:37:07,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40494092373791624 [2022-12-13 11:37:07,240 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2262 transitions. [2022-12-13 11:37:07,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2262 transitions. [2022-12-13 11:37:07,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:07,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2262 transitions. [2022-12-13 11:37:07,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.57142857142858) internal successors, (2262), 14 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 11:37:07,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 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 11:37:07,272 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 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 11:37:07,272 INFO L175 Difference]: Start difference. First operand has 133 places, 112 transitions, 1379 flow. Second operand 14 states and 2262 transitions. [2022-12-13 11:37:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 276 transitions, 2794 flow [2022-12-13 11:37:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 276 transitions, 2778 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:37:07,423 INFO L231 Difference]: Finished difference. Result has 146 places, 119 transitions, 1542 flow [2022-12-13 11:37:07,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1542, PETRI_PLACES=146, PETRI_TRANSITIONS=119} [2022-12-13 11:37:07,423 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2022-12-13 11:37:07,423 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 119 transitions, 1542 flow [2022-12-13 11:37:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.66666666666666) internal successors, (1796), 12 states have internal predecessors, (1796), 0 states have call successors, (0), 0 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 11:37:07,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:07,424 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:07,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:07,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:07,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:37:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1232671640, now seen corresponding path program 2 times [2022-12-13 11:37:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:07,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31639521] [2022-12-13 11:37:07,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:37:07,628 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 11:37:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:07,631 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:07,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:07,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:37:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:37:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:07,866 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 11:37:07,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 11:37:07,907 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:37:07,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:37:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:37:07,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:37:07,976 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:37:07,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:37:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:37:08,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:37:10,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31639521] [2022-12-13 11:37:10,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31639521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:10,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:10,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:37:10,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23121093] [2022-12-13 11:37:10,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:37:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:37:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:37:16,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 399 [2022-12-13 11:37:16,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 119 transitions, 1542 flow. Second operand has 12 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 11:37:16,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:16,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 399 [2022-12-13 11:37:16,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:21,507 INFO L130 PetriNetUnfolder]: 9423/17457 cut-off events. [2022-12-13 11:37:21,508 INFO L131 PetriNetUnfolder]: For 106260/106260 co-relation queries the response was YES. [2022-12-13 11:37:21,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73239 conditions, 17457 events. 9423/17457 cut-off events. For 106260/106260 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 145974 event pairs, 3681 based on Foata normal form. 1026/18483 useless extension candidates. Maximal degree in co-relation 73181. Up to 6185 conditions per place. [2022-12-13 11:37:21,593 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 228 selfloop transitions, 37 changer transitions 0/265 dead transitions. [2022-12-13 11:37:21,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 265 transitions, 3024 flow [2022-12-13 11:37:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:37:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:37:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1853 transitions. [2022-12-13 11:37:21,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42219184324447484 [2022-12-13 11:37:21,598 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1853 transitions. [2022-12-13 11:37:21,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1853 transitions. [2022-12-13 11:37:21,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:21,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1853 transitions. [2022-12-13 11:37:21,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.45454545454547) internal successors, (1853), 11 states have internal predecessors, (1853), 0 states have call successors, (0), 0 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 11:37:21,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 11:37:21,602 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 11:37:21,602 INFO L175 Difference]: Start difference. First operand has 146 places, 119 transitions, 1542 flow. Second operand 11 states and 1853 transitions. [2022-12-13 11:37:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 265 transitions, 3024 flow [2022-12-13 11:37:21,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 2954 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-12-13 11:37:21,820 INFO L231 Difference]: Finished difference. Result has 154 places, 124 transitions, 1656 flow [2022-12-13 11:37:21,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1656, PETRI_PLACES=154, PETRI_TRANSITIONS=124} [2022-12-13 11:37:21,821 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2022-12-13 11:37:21,821 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 124 transitions, 1656 flow [2022-12-13 11:37:21,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 11:37:21,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:21,821 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:21,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:22,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:22,023 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:37:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1232671677, now seen corresponding path program 1 times [2022-12-13 11:37:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:22,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591285073] [2022-12-13 11:37:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:37:22,025 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 11:37:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:22,028 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:22,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:37:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:37:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:22,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:37:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:37:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:37:22,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:22,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591285073] [2022-12-13 11:37:22,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591285073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:22,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:22,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:37:22,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504607956] [2022-12-13 11:37:22,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:22,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:37:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:37:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:37:26,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 399 [2022-12-13 11:37:26,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 124 transitions, 1656 flow. Second operand has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 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 11:37:26,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:26,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 399 [2022-12-13 11:37:26,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:31,902 INFO L130 PetriNetUnfolder]: 12805/23183 cut-off events. [2022-12-13 11:37:31,903 INFO L131 PetriNetUnfolder]: For 146610/146610 co-relation queries the response was YES. [2022-12-13 11:37:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110963 conditions, 23183 events. 12805/23183 cut-off events. For 146610/146610 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 194334 event pairs, 2820 based on Foata normal form. 1542/24725 useless extension candidates. Maximal degree in co-relation 110901. Up to 6772 conditions per place. [2022-12-13 11:37:32,050 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 163 selfloop transitions, 54 changer transitions 0/217 dead transitions. [2022-12-13 11:37:32,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2954 flow [2022-12-13 11:37:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:37:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:37:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1558 transitions. [2022-12-13 11:37:32,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2022-12-13 11:37:32,054 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1558 transitions. [2022-12-13 11:37:32,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1558 transitions. [2022-12-13 11:37:32,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:32,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1558 transitions. [2022-12-13 11:37:32,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 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 11:37:32,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:37:32,058 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 11:37:32,058 INFO L175 Difference]: Start difference. First operand has 154 places, 124 transitions, 1656 flow. Second operand 9 states and 1558 transitions. [2022-12-13 11:37:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2954 flow [2022-12-13 11:37:32,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2853 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-13 11:37:32,749 INFO L231 Difference]: Finished difference. Result has 160 places, 127 transitions, 1749 flow [2022-12-13 11:37:32,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=160, PETRI_TRANSITIONS=127} [2022-12-13 11:37:32,750 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2022-12-13 11:37:32,750 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 127 transitions, 1749 flow [2022-12-13 11:37:32,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 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 11:37:32,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:32,750 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:32,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:32,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:32,951 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:37:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash 441887815, now seen corresponding path program 3 times [2022-12-13 11:37:32,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909569794] [2022-12-13 11:37:32,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:37:32,954 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 11:37:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:32,957 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:32,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:33,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:37:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:37:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:33,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:37:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:37:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:37:33,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:33,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909569794] [2022-12-13 11:37:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909569794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:33,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:33,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 11:37:33,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553961897] [2022-12-13 11:37:33,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:33,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:37:33,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:37:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:37:36,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 399 [2022-12-13 11:37:36,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 127 transitions, 1749 flow. Second operand has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 11:37:36,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:36,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 399 [2022-12-13 11:37:36,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:41,327 INFO L130 PetriNetUnfolder]: 11827/21557 cut-off events. [2022-12-13 11:37:41,328 INFO L131 PetriNetUnfolder]: For 161123/161123 co-relation queries the response was YES. [2022-12-13 11:37:41,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104100 conditions, 21557 events. 11827/21557 cut-off events. For 161123/161123 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 181788 event pairs, 2820 based on Foata normal form. 66/21623 useless extension candidates. Maximal degree in co-relation 104035. Up to 10914 conditions per place. [2022-12-13 11:37:41,472 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 167 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2022-12-13 11:37:41,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 216 transitions, 2847 flow [2022-12-13 11:37:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:37:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:37:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1638 transitions. [2022-12-13 11:37:41,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2022-12-13 11:37:41,476 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1638 transitions. [2022-12-13 11:37:41,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1638 transitions. [2022-12-13 11:37:41,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:41,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1638 transitions. [2022-12-13 11:37:41,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.8) internal successors, (1638), 10 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 11:37:41,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 399.0) internal successors, (4389), 11 states have internal predecessors, (4389), 0 states have call successors, (0), 0 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 11:37:41,480 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 399.0) internal successors, (4389), 11 states have internal predecessors, (4389), 0 states have call successors, (0), 0 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 11:37:41,480 INFO L175 Difference]: Start difference. First operand has 160 places, 127 transitions, 1749 flow. Second operand 10 states and 1638 transitions. [2022-12-13 11:37:41,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 216 transitions, 2847 flow [2022-12-13 11:37:42,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 2714 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-12-13 11:37:42,619 INFO L231 Difference]: Finished difference. Result has 164 places, 127 transitions, 1748 flow [2022-12-13 11:37:42,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1748, PETRI_PLACES=164, PETRI_TRANSITIONS=127} [2022-12-13 11:37:42,620 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2022-12-13 11:37:42,620 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 127 transitions, 1748 flow [2022-12-13 11:37:42,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 11:37:42,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:42,620 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:42,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:42,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:42,821 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:37:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash 318987389, now seen corresponding path program 3 times [2022-12-13 11:37:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:42,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755906004] [2022-12-13 11:37:42,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:37:42,824 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 11:37:42,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:42,826 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:42,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:37:42,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:37:42,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 11:37:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:43,032 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:37:43,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:37:43,075 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:37:43,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:37:43,177 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 11:37:43,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-12-13 11:37:43,203 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:37:43,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:37:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:37:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:37:46,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755906004] [2022-12-13 11:37:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755906004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:46,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 11:37:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195904439] [2022-12-13 11:37:46,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:37:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:37:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:38:09,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 399 [2022-12-13 11:38:09,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 127 transitions, 1748 flow. Second operand has 16 states, 16 states have (on average 146.375) internal successors, (2342), 16 states have internal predecessors, (2342), 0 states have call successors, (0), 0 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 11:38:09,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:09,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 399 [2022-12-13 11:38:09,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:38:14,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:38:38,051 INFO L130 PetriNetUnfolder]: 12441/22827 cut-off events. [2022-12-13 11:38:38,051 INFO L131 PetriNetUnfolder]: For 159308/159308 co-relation queries the response was YES. [2022-12-13 11:38:38,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102884 conditions, 22827 events. 12441/22827 cut-off events. For 159308/159308 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 194856 event pairs, 5741 based on Foata normal form. 78/22905 useless extension candidates. Maximal degree in co-relation 102819. Up to 4900 conditions per place. [2022-12-13 11:38:38,187 INFO L137 encePairwiseOnDemand]: 386/399 looper letters, 289 selfloop transitions, 121 changer transitions 0/410 dead transitions. [2022-12-13 11:38:38,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 410 transitions, 4947 flow [2022-12-13 11:38:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 11:38:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 11:38:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3867 transitions. [2022-12-13 11:38:38,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38766917293233083 [2022-12-13 11:38:38,193 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3867 transitions. [2022-12-13 11:38:38,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3867 transitions. [2022-12-13 11:38:38,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:38:38,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3867 transitions. [2022-12-13 11:38:38,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 154.68) internal successors, (3867), 25 states have internal predecessors, (3867), 0 states have call successors, (0), 0 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 11:38:38,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 399.0) internal successors, (10374), 26 states have internal predecessors, (10374), 0 states have call successors, (0), 0 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 11:38:38,204 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 399.0) internal successors, (10374), 26 states have internal predecessors, (10374), 0 states have call successors, (0), 0 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 11:38:38,204 INFO L175 Difference]: Start difference. First operand has 164 places, 127 transitions, 1748 flow. Second operand 25 states and 3867 transitions. [2022-12-13 11:38:38,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 410 transitions, 4947 flow [2022-12-13 11:38:38,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 410 transitions, 4845 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-13 11:38:38,517 INFO L231 Difference]: Finished difference. Result has 189 places, 198 transitions, 3011 flow [2022-12-13 11:38:38,517 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3011, PETRI_PLACES=189, PETRI_TRANSITIONS=198} [2022-12-13 11:38:38,517 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2022-12-13 11:38:38,517 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 198 transitions, 3011 flow [2022-12-13 11:38:38,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 146.375) internal successors, (2342), 16 states have internal predecessors, (2342), 0 states have call successors, (0), 0 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 11:38:38,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:38:38,517 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 1, 1, 1] [2022-12-13 11:38:38,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:38:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:38:38,719 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:38:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 835869061, now seen corresponding path program 1 times [2022-12-13 11:38:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:38:38,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755450798] [2022-12-13 11:38:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:38,721 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 11:38:38,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:38:38,724 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:38:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:38:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:38:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:38,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:38:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:39,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:41,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:38:41,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755450798] [2022-12-13 11:38:41,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755450798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:41,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:38:41,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-12-13 11:38:41,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056242953] [2022-12-13 11:38:41,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:41,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:38:41,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:38:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:38:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:39:01,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2022-12-13 11:39:01,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 198 transitions, 3011 flow. Second operand has 22 states, 22 states have (on average 161.04545454545453) internal successors, (3543), 22 states have internal predecessors, (3543), 0 states have call successors, (0), 0 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 11:39:01,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:01,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2022-12-13 11:39:01,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:09,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:10,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:12,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:14,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:16,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:18,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:20,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:22,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:24,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:49,997 INFO L130 PetriNetUnfolder]: 28317/51529 cut-off events. [2022-12-13 11:39:49,997 INFO L131 PetriNetUnfolder]: For 411563/411563 co-relation queries the response was YES. [2022-12-13 11:39:50,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244599 conditions, 51529 events. 28317/51529 cut-off events. For 411563/411563 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 469144 event pairs, 23223 based on Foata normal form. 46/51575 useless extension candidates. Maximal degree in co-relation 244530. Up to 8111 conditions per place. [2022-12-13 11:39:50,428 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 816 selfloop transitions, 67 changer transitions 0/883 dead transitions. [2022-12-13 11:39:50,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 883 transitions, 12591 flow [2022-12-13 11:39:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:39:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:39:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3936 transitions. [2022-12-13 11:39:50,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4483937115516063 [2022-12-13 11:39:50,435 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3936 transitions. [2022-12-13 11:39:50,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3936 transitions. [2022-12-13 11:39:50,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:50,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3936 transitions. [2022-12-13 11:39:50,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 178.9090909090909) internal successors, (3936), 22 states have internal predecessors, (3936), 0 states have call successors, (0), 0 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 11:39:50,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 399.0) internal successors, (9177), 23 states have internal predecessors, (9177), 0 states have call successors, (0), 0 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 11:39:50,444 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 399.0) internal successors, (9177), 23 states have internal predecessors, (9177), 0 states have call successors, (0), 0 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 11:39:50,444 INFO L175 Difference]: Start difference. First operand has 189 places, 198 transitions, 3011 flow. Second operand 22 states and 3936 transitions. [2022-12-13 11:39:50,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 883 transitions, 12591 flow [2022-12-13 11:39:52,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 883 transitions, 12429 flow, removed 63 selfloop flow, removed 5 redundant places. [2022-12-13 11:39:52,363 INFO L231 Difference]: Finished difference. Result has 217 places, 221 transitions, 3442 flow [2022-12-13 11:39:52,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3442, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2022-12-13 11:39:52,363 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2022-12-13 11:39:52,363 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 3442 flow [2022-12-13 11:39:52,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 161.04545454545453) internal successors, (3543), 22 states have internal predecessors, (3543), 0 states have call successors, (0), 0 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 11:39:52,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:52,364 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:52,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:39:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:39:52,565 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:39:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1982639196, now seen corresponding path program 1 times [2022-12-13 11:39:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:52,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283676981] [2022-12-13 11:39:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:52,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:39:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:52,570 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:39:52,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:39:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:39:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:52,724 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 11:39:52,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:52,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283676981] [2022-12-13 11:39:52,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283676981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:52,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:52,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:39:52,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275663849] [2022-12-13 11:39:52,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:52,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2022-12-13 11:39:52,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 3442 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 11:39:52,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:52,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2022-12-13 11:39:52,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:04,177 INFO L130 PetriNetUnfolder]: 28317/51393 cut-off events. [2022-12-13 11:40:04,177 INFO L131 PetriNetUnfolder]: For 410365/410365 co-relation queries the response was YES. [2022-12-13 11:40:04,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244135 conditions, 51393 events. 28317/51393 cut-off events. For 410365/410365 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 462691 event pairs, 11100 based on Foata normal form. 136/51529 useless extension candidates. Maximal degree in co-relation 244054. Up to 47370 conditions per place. [2022-12-13 11:40:04,686 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 206 selfloop transitions, 27 changer transitions 16/249 dead transitions. [2022-12-13 11:40:04,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 249 transitions, 4259 flow [2022-12-13 11:40:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:40:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-12-13 11:40:04,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4778613199665831 [2022-12-13 11:40:04,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-12-13 11:40:04,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-12-13 11:40:04,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:04,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-12-13 11:40:04,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 11:40:04,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:40:04,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 11:40:04,690 INFO L175 Difference]: Start difference. First operand has 217 places, 221 transitions, 3442 flow. Second operand 3 states and 572 transitions. [2022-12-13 11:40:04,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 249 transitions, 4259 flow [2022-12-13 11:40:07,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 249 transitions, 4157 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-12-13 11:40:07,054 INFO L231 Difference]: Finished difference. Result has 214 places, 224 transitions, 3436 flow [2022-12-13 11:40:07,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3436, PETRI_PLACES=214, PETRI_TRANSITIONS=224} [2022-12-13 11:40:07,055 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2022-12-13 11:40:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 224 transitions, 3436 flow [2022-12-13 11:40:07,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 11:40:07,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:07,056 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:07,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:07,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:07,257 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:40:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash 144068152, now seen corresponding path program 4 times [2022-12-13 11:40:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528868373] [2022-12-13 11:40:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:40:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:40:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:07,262 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:07,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:07,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:40:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:40:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:07,480 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:40:07,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:40:07,564 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 13 treesize of output 9 [2022-12-13 11:40:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:40:07,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:40:08,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528868373] [2022-12-13 11:40:08,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528868373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:08,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:40:08,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:40:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142274636] [2022-12-13 11:40:08,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:40:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:40:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:40:13,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 399 [2022-12-13 11:40:13,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 224 transitions, 3436 flow. Second operand has 14 states, 14 states have (on average 156.71428571428572) internal successors, (2194), 14 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 11:40:13,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:13,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 399 [2022-12-13 11:40:13,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:27,920 INFO L130 PetriNetUnfolder]: 32812/60296 cut-off events. [2022-12-13 11:40:27,920 INFO L131 PetriNetUnfolder]: For 548332/548332 co-relation queries the response was YES. [2022-12-13 11:40:28,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285224 conditions, 60296 events. 32812/60296 cut-off events. For 548332/548332 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 574261 event pairs, 21817 based on Foata normal form. 1920/62216 useless extension candidates. Maximal degree in co-relation 285141. Up to 41589 conditions per place. [2022-12-13 11:40:28,520 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 409 selfloop transitions, 27 changer transitions 0/436 dead transitions. [2022-12-13 11:40:28,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 436 transitions, 6671 flow [2022-12-13 11:40:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:40:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:40:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1966 transitions. [2022-12-13 11:40:28,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41060985797827904 [2022-12-13 11:40:28,523 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1966 transitions. [2022-12-13 11:40:28,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1966 transitions. [2022-12-13 11:40:28,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:28,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1966 transitions. [2022-12-13 11:40:28,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.83333333333334) internal successors, (1966), 12 states have internal predecessors, (1966), 0 states have call successors, (0), 0 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 11:40:28,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:40:28,528 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:40:28,528 INFO L175 Difference]: Start difference. First operand has 214 places, 224 transitions, 3436 flow. Second operand 12 states and 1966 transitions. [2022-12-13 11:40:28,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 436 transitions, 6671 flow [2022-12-13 11:40:31,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 436 transitions, 6407 flow, removed 114 selfloop flow, removed 4 redundant places. [2022-12-13 11:40:31,932 INFO L231 Difference]: Finished difference. Result has 216 places, 232 transitions, 3573 flow [2022-12-13 11:40:31,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3573, PETRI_PLACES=216, PETRI_TRANSITIONS=232} [2022-12-13 11:40:31,933 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2022-12-13 11:40:31,933 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 232 transitions, 3573 flow [2022-12-13 11:40:31,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.71428571428572) internal successors, (2194), 14 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 11:40:31,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:31,933 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:40:31,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:40:32,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:32,135 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:40:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash 21167726, now seen corresponding path program 4 times [2022-12-13 11:40:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414440887] [2022-12-13 11:40:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:40:32,138 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 11:40:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:32,141 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:32,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:32,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:40:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:40:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:32,353 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:40:32,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:40:32,451 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 15 treesize of output 11 [2022-12-13 11:40:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:40:32,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:40:33,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:33,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414440887] [2022-12-13 11:40:33,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414440887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:33,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:40:33,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:40:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873970184] [2022-12-13 11:40:33,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:33,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:40:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:40:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:40:37,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 399 [2022-12-13 11:40:37,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 232 transitions, 3573 flow. Second operand has 14 states, 14 states have (on average 156.71428571428572) internal successors, (2194), 14 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 11:40:37,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:37,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 399 [2022-12-13 11:40:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:49,899 INFO L130 PetriNetUnfolder]: 28118/51644 cut-off events. [2022-12-13 11:40:49,900 INFO L131 PetriNetUnfolder]: For 409355/409355 co-relation queries the response was YES. [2022-12-13 11:40:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234678 conditions, 51644 events. 28118/51644 cut-off events. For 409355/409355 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 478508 event pairs, 20405 based on Foata normal form. 430/52074 useless extension candidates. Maximal degree in co-relation 234593. Up to 41589 conditions per place. [2022-12-13 11:40:50,485 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 329 selfloop transitions, 33 changer transitions 0/362 dead transitions. [2022-12-13 11:40:50,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 362 transitions, 5347 flow [2022-12-13 11:40:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:40:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:40:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1962 transitions. [2022-12-13 11:40:50,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40977443609022557 [2022-12-13 11:40:50,489 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1962 transitions. [2022-12-13 11:40:50,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1962 transitions. [2022-12-13 11:40:50,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:50,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1962 transitions. [2022-12-13 11:40:50,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 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 11:40:50,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:40:50,498 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 399.0) internal successors, (5187), 13 states have internal predecessors, (5187), 0 states have call successors, (0), 0 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 11:40:50,498 INFO L175 Difference]: Start difference. First operand has 216 places, 232 transitions, 3573 flow. Second operand 12 states and 1962 transitions. [2022-12-13 11:40:50,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 362 transitions, 5347 flow [2022-12-13 11:40:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 362 transitions, 5329 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 11:40:52,666 INFO L231 Difference]: Finished difference. Result has 227 places, 238 transitions, 3796 flow [2022-12-13 11:40:52,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3796, PETRI_PLACES=227, PETRI_TRANSITIONS=238} [2022-12-13 11:40:52,667 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2022-12-13 11:40:52,667 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 238 transitions, 3796 flow [2022-12-13 11:40:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.71428571428572) internal successors, (2194), 14 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 11:40:52,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:52,667 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1] [2022-12-13 11:40:52,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:52,868 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:40:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2012542738, now seen corresponding path program 3 times [2022-12-13 11:40:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:52,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320914879] [2022-12-13 11:40:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:40:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:40:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:52,874 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:52,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:40:53,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 11:40:53,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:40:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:53,267 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:40:53,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:40:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:53,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:57,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320914879] [2022-12-13 11:40:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320914879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:57,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:40:57,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-12-13 11:40:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661635426] [2022-12-13 11:40:57,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:57,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:40:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:40:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-12-13 11:41:27,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 399 [2022-12-13 11:41:27,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 238 transitions, 3796 flow. Second operand has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 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 11:41:27,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:41:27,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 399 [2022-12-13 11:41:27,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:41:42,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:44,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:46,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:48,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:50,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:52,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:54,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:56,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:41:58,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:42:00,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:42:02,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:42:04,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:42:34,297 INFO L130 PetriNetUnfolder]: 31640/58063 cut-off events. [2022-12-13 11:42:34,297 INFO L131 PetriNetUnfolder]: For 496023/496023 co-relation queries the response was YES. [2022-12-13 11:42:34,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269870 conditions, 58063 events. 31640/58063 cut-off events. For 496023/496023 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 545990 event pairs, 25830 based on Foata normal form. 14/58077 useless extension candidates. Maximal degree in co-relation 269781. Up to 16399 conditions per place. [2022-12-13 11:42:34,982 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 783 selfloop transitions, 91 changer transitions 0/874 dead transitions. [2022-12-13 11:42:34,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 874 transitions, 13928 flow [2022-12-13 11:42:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:42:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:42:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4888 transitions. [2022-12-13 11:42:34,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43752237737200145 [2022-12-13 11:42:34,990 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4888 transitions. [2022-12-13 11:42:34,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4888 transitions. [2022-12-13 11:42:34,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:42:34,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4888 transitions. [2022-12-13 11:42:34,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 174.57142857142858) internal successors, (4888), 28 states have internal predecessors, (4888), 0 states have call successors, (0), 0 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 11:42:35,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 399.0) internal successors, (11571), 29 states have internal predecessors, (11571), 0 states have call successors, (0), 0 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 11:42:35,002 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 399.0) internal successors, (11571), 29 states have internal predecessors, (11571), 0 states have call successors, (0), 0 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 11:42:35,002 INFO L175 Difference]: Start difference. First operand has 227 places, 238 transitions, 3796 flow. Second operand 28 states and 4888 transitions. [2022-12-13 11:42:35,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 874 transitions, 13928 flow [2022-12-13 11:42:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 874 transitions, 13881 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-12-13 11:42:37,506 INFO L231 Difference]: Finished difference. Result has 264 places, 269 transitions, 4487 flow [2022-12-13 11:42:37,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4487, PETRI_PLACES=264, PETRI_TRANSITIONS=269} [2022-12-13 11:42:37,506 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2022-12-13 11:42:37,506 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 269 transitions, 4487 flow [2022-12-13 11:42:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 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 11:42:37,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:42:37,507 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:37,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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)] Ended with exit code 0 [2022-12-13 11:42:37,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:42:37,708 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:42:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2438427, now seen corresponding path program 5 times [2022-12-13 11:42:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:42:37,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025121890] [2022-12-13 11:42:37,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:42:37,711 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 11:42:37,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:42:37,714 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:42:37,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (34)] Waiting until timeout for monitored process [2022-12-13 11:42:37,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:42:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:42:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:42:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:37,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:42:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:42:38,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:42:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:42:39,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:42:39,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025121890] [2022-12-13 11:42:39,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025121890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:42:39,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:42:39,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 11:42:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761140903] [2022-12-13 11:42:39,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:42:39,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:42:39,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:42:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:42:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:42:47,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 399 [2022-12-13 11:42:47,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 269 transitions, 4487 flow. Second operand has 16 states, 16 states have (on average 153.5) internal successors, (2456), 16 states have internal predecessors, (2456), 0 states have call successors, (0), 0 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 11:42:47,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:42:47,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 399 [2022-12-13 11:42:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:43:04,786 INFO L130 PetriNetUnfolder]: 30889/56828 cut-off events. [2022-12-13 11:43:04,786 INFO L131 PetriNetUnfolder]: For 457445/457445 co-relation queries the response was YES. [2022-12-13 11:43:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263515 conditions, 56828 events. 30889/56828 cut-off events. For 457445/457445 co-relation queries the response was YES. Maximal size of possible extension queue 1510. Compared 535984 event pairs, 7857 based on Foata normal form. 128/56956 useless extension candidates. Maximal degree in co-relation 263411. Up to 27281 conditions per place. [2022-12-13 11:43:05,511 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 305 selfloop transitions, 128 changer transitions 0/433 dead transitions. [2022-12-13 11:43:05,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 433 transitions, 7031 flow [2022-12-13 11:43:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:43:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 11:43:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2565 transitions. [2022-12-13 11:43:05,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2022-12-13 11:43:05,516 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2565 transitions. [2022-12-13 11:43:05,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2565 transitions. [2022-12-13 11:43:05,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:43:05,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2565 transitions. [2022-12-13 11:43:05,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 160.3125) internal successors, (2565), 16 states have internal predecessors, (2565), 0 states have call successors, (0), 0 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 11:43:05,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:43:05,522 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:43:05,522 INFO L175 Difference]: Start difference. First operand has 264 places, 269 transitions, 4487 flow. Second operand 16 states and 2565 transitions. [2022-12-13 11:43:05,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 433 transitions, 7031 flow [2022-12-13 11:43:09,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 433 transitions, 6852 flow, removed 36 selfloop flow, removed 11 redundant places. [2022-12-13 11:43:09,622 INFO L231 Difference]: Finished difference. Result has 269 places, 283 transitions, 4831 flow [2022-12-13 11:43:09,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4831, PETRI_PLACES=269, PETRI_TRANSITIONS=283} [2022-12-13 11:43:09,623 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2022-12-13 11:43:09,623 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 283 transitions, 4831 flow [2022-12-13 11:43:09,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 153.5) internal successors, (2456), 16 states have internal predecessors, (2456), 0 states have call successors, (0), 0 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 11:43:09,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:43:09,624 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:43:09,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (34)] Ended with exit code 0 [2022-12-13 11:43:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:43:09,824 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:43:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -125338853, now seen corresponding path program 5 times [2022-12-13 11:43:09,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:43:09,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517283739] [2022-12-13 11:43:09,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:43:09,827 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 11:43:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:43:09,830 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:43:09,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (35)] Waiting until timeout for monitored process [2022-12-13 11:43:10,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:43:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:43:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:43:10,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:43:11,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:43:11,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517283739] [2022-12-13 11:43:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517283739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:11,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:43:11,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-12-13 11:43:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234093484] [2022-12-13 11:43:11,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:11,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:43:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:43:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:43:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:43:13,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 399 [2022-12-13 11:43:13,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 283 transitions, 4831 flow. Second operand has 20 states, 20 states have (on average 164.25) internal successors, (3285), 20 states have internal predecessors, (3285), 0 states have call successors, (0), 0 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 11:43:13,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:43:13,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 399 [2022-12-13 11:43:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:43:25,638 INFO L130 PetriNetUnfolder]: 26255/48317 cut-off events. [2022-12-13 11:43:25,639 INFO L131 PetriNetUnfolder]: For 461798/461798 co-relation queries the response was YES. [2022-12-13 11:43:26,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230846 conditions, 48317 events. 26255/48317 cut-off events. For 461798/461798 co-relation queries the response was YES. Maximal size of possible extension queue 1416. Compared 440232 event pairs, 5080 based on Foata normal form. 76/48393 useless extension candidates. Maximal degree in co-relation 230740. Up to 25271 conditions per place. [2022-12-13 11:43:26,247 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 254 selfloop transitions, 117 changer transitions 0/371 dead transitions. [2022-12-13 11:43:26,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 371 transitions, 5987 flow [2022-12-13 11:43:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:43:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:43:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2578 transitions. [2022-12-13 11:43:26,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4307435254803676 [2022-12-13 11:43:26,251 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2578 transitions. [2022-12-13 11:43:26,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2578 transitions. [2022-12-13 11:43:26,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:43:26,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2578 transitions. [2022-12-13 11:43:26,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 171.86666666666667) internal successors, (2578), 15 states have internal predecessors, (2578), 0 states have call successors, (0), 0 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 11:43:26,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 399.0) internal successors, (6384), 16 states have internal predecessors, (6384), 0 states have call successors, (0), 0 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 11:43:26,257 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 399.0) internal successors, (6384), 16 states have internal predecessors, (6384), 0 states have call successors, (0), 0 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 11:43:26,257 INFO L175 Difference]: Start difference. First operand has 269 places, 283 transitions, 4831 flow. Second operand 15 states and 2578 transitions. [2022-12-13 11:43:26,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 371 transitions, 5987 flow [2022-12-13 11:43:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 371 transitions, 5555 flow, removed 17 selfloop flow, removed 14 redundant places. [2022-12-13 11:43:28,668 INFO L231 Difference]: Finished difference. Result has 270 places, 262 transitions, 4369 flow [2022-12-13 11:43:28,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4369, PETRI_PLACES=270, PETRI_TRANSITIONS=262} [2022-12-13 11:43:28,669 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2022-12-13 11:43:28,669 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 262 transitions, 4369 flow [2022-12-13 11:43:28,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 164.25) internal successors, (3285), 20 states have internal predecessors, (3285), 0 states have call successors, (0), 0 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 11:43:28,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:43:28,669 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:28,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (35)] Ended with exit code 0 [2022-12-13 11:43:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:43:28,870 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:43:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash -745143462, now seen corresponding path program 6 times [2022-12-13 11:43:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:43:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127084402] [2022-12-13 11:43:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:43:28,873 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 11:43:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:43:28,876 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:43:28,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (36)] Waiting until timeout for monitored process [2022-12-13 11:43:29,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:43:29,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:43:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:29,149 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 11:43:29,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 11:43:29,203 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:43:29,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:43:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:43:29,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:43:29,340 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:43:29,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:43:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:43:29,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:43:31,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:43:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127084402] [2022-12-13 11:43:31,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127084402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:31,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:43:31,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 11:43:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805610019] [2022-12-13 11:43:31,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:31,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:43:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:43:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:43:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:43:33,957 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 11:43:36,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:43:41,626 WARN L539 Checker$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 11:43:52,058 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 11:43:55,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 399 [2022-12-13 11:43:55,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 262 transitions, 4369 flow. Second operand has 16 states, 16 states have (on average 151.625) internal successors, (2426), 16 states have internal predecessors, (2426), 0 states have call successors, (0), 0 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 11:43:55,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:43:55,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 399 [2022-12-13 11:43:55,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:15,571 INFO L130 PetriNetUnfolder]: 25009/46175 cut-off events. [2022-12-13 11:44:15,571 INFO L131 PetriNetUnfolder]: For 418731/418731 co-relation queries the response was YES. [2022-12-13 11:44:15,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213640 conditions, 46175 events. 25009/46175 cut-off events. For 418731/418731 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 427056 event pairs, 9428 based on Foata normal form. 896/47071 useless extension candidates. Maximal degree in co-relation 213538. Up to 18609 conditions per place. [2022-12-13 11:44:16,091 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 469 selfloop transitions, 91 changer transitions 0/560 dead transitions. [2022-12-13 11:44:16,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 560 transitions, 7802 flow [2022-12-13 11:44:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:44:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 11:44:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3727 transitions. [2022-12-13 11:44:16,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40612400566633977 [2022-12-13 11:44:16,097 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3727 transitions. [2022-12-13 11:44:16,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3727 transitions. [2022-12-13 11:44:16,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:16,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3727 transitions. [2022-12-13 11:44:16,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 162.04347826086956) internal successors, (3727), 23 states have internal predecessors, (3727), 0 states have call successors, (0), 0 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 11:44:16,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 399.0) internal successors, (9576), 24 states have internal predecessors, (9576), 0 states have call successors, (0), 0 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 11:44:16,105 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 399.0) internal successors, (9576), 24 states have internal predecessors, (9576), 0 states have call successors, (0), 0 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 11:44:16,105 INFO L175 Difference]: Start difference. First operand has 270 places, 262 transitions, 4369 flow. Second operand 23 states and 3727 transitions. [2022-12-13 11:44:16,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 560 transitions, 7802 flow [2022-12-13 11:44:19,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 560 transitions, 7651 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 11:44:19,536 INFO L231 Difference]: Finished difference. Result has 288 places, 263 transitions, 4433 flow [2022-12-13 11:44:19,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4433, PETRI_PLACES=288, PETRI_TRANSITIONS=263} [2022-12-13 11:44:19,536 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2022-12-13 11:44:19,537 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 263 transitions, 4433 flow [2022-12-13 11:44:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 151.625) internal successors, (2426), 16 states have internal predecessors, (2426), 0 states have call successors, (0), 0 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 11:44:19,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:19,537 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:44:19,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (36)] Forceful destruction successful, exit code 0 [2022-12-13 11:44:19,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:44:19,738 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:44:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -868043888, now seen corresponding path program 6 times [2022-12-13 11:44:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:44:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119747347] [2022-12-13 11:44:19,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:44:19,741 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 11:44:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:44:19,743 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:44:19,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (37)] Waiting until timeout for monitored process [2022-12-13 11:44:19,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:44:19,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:44:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:20,002 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 11:44:20,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 11:44:20,050 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:44:20,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 11:44:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:44:20,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 11:44:20,168 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:44:20,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:44:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:44:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:44:22,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:44:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119747347] [2022-12-13 11:44:22,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119747347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:22,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:44:22,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-12-13 11:44:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417141965] [2022-12-13 11:44:22,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:22,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:44:22,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:44:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:44:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:44:37,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 399 [2022-12-13 11:44:37,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 263 transitions, 4433 flow. Second operand has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 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 11:44:37,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:37,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 399 [2022-12-13 11:44:37,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:54,900 INFO L130 PetriNetUnfolder]: 24337/45055 cut-off events. [2022-12-13 11:44:54,900 INFO L131 PetriNetUnfolder]: For 384891/384891 co-relation queries the response was YES. [2022-12-13 11:44:55,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211315 conditions, 45055 events. 24337/45055 cut-off events. For 384891/384891 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 409340 event pairs, 4064 based on Foata normal form. 448/45503 useless extension candidates. Maximal degree in co-relation 211212. Up to 12707 conditions per place. [2022-12-13 11:44:55,396 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 402 selfloop transitions, 110 changer transitions 0/512 dead transitions. [2022-12-13 11:44:55,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 512 transitions, 7201 flow [2022-12-13 11:44:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:44:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:44:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3487 transitions. [2022-12-13 11:44:55,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4161594462346342 [2022-12-13 11:44:55,402 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3487 transitions. [2022-12-13 11:44:55,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3487 transitions. [2022-12-13 11:44:55,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:55,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3487 transitions. [2022-12-13 11:44:55,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 166.04761904761904) internal successors, (3487), 21 states have internal predecessors, (3487), 0 states have call successors, (0), 0 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 11:44:55,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 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 11:44:55,410 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 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 11:44:55,411 INFO L175 Difference]: Start difference. First operand has 288 places, 263 transitions, 4433 flow. Second operand 21 states and 3487 transitions. [2022-12-13 11:44:55,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 512 transitions, 7201 flow [2022-12-13 11:44:57,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 512 transitions, 6799 flow, removed 26 selfloop flow, removed 16 redundant places. [2022-12-13 11:44:57,210 INFO L231 Difference]: Finished difference. Result has 297 places, 274 transitions, 4621 flow [2022-12-13 11:44:57,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4621, PETRI_PLACES=297, PETRI_TRANSITIONS=274} [2022-12-13 11:44:57,210 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2022-12-13 11:44:57,210 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 274 transitions, 4621 flow [2022-12-13 11:44:57,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 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 11:44:57,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:57,210 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:57,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (37)] Ended with exit code 0 [2022-12-13 11:44:57,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:44:57,411 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:44:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1176767162, now seen corresponding path program 7 times [2022-12-13 11:44:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:44:57,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072250283] [2022-12-13 11:44:57,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:44:57,415 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 11:44:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:44:57,418 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:44:57,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (38)] Waiting until timeout for monitored process [2022-12-13 11:44:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:44:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:57,732 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:44:57,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:44:57,864 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 18 treesize of output 12 [2022-12-13 11:44:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:44:58,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:44:58,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:44:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072250283] [2022-12-13 11:44:58,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072250283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:58,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:44:58,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 11:44:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199719618] [2022-12-13 11:44:58,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:44:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:44:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:44:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:45:06,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 399 [2022-12-13 11:45:06,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 274 transitions, 4621 flow. Second operand has 18 states, 18 states have (on average 156.61111111111111) internal successors, (2819), 18 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:06,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 399 [2022-12-13 11:45:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:22,887 INFO L130 PetriNetUnfolder]: 30831/57681 cut-off events. [2022-12-13 11:45:22,887 INFO L131 PetriNetUnfolder]: For 469919/469919 co-relation queries the response was YES. [2022-12-13 11:45:23,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259879 conditions, 57681 events. 30831/57681 cut-off events. For 469919/469919 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 557535 event pairs, 17328 based on Foata normal form. 1736/59417 useless extension candidates. Maximal degree in co-relation 259773. Up to 29125 conditions per place. [2022-12-13 11:45:23,657 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 512 selfloop transitions, 47 changer transitions 0/559 dead transitions. [2022-12-13 11:45:23,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 559 transitions, 8980 flow [2022-12-13 11:45:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:45:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:45:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2794 transitions. [2022-12-13 11:45:23,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4119121332743624 [2022-12-13 11:45:23,662 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2794 transitions. [2022-12-13 11:45:23,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2794 transitions. [2022-12-13 11:45:23,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:23,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2794 transitions. [2022-12-13 11:45:23,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 164.35294117647058) internal successors, (2794), 17 states have internal predecessors, (2794), 0 states have call successors, (0), 0 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 11:45:23,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 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 11:45:23,673 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 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 11:45:23,673 INFO L175 Difference]: Start difference. First operand has 297 places, 274 transitions, 4621 flow. Second operand 17 states and 2794 transitions. [2022-12-13 11:45:23,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 559 transitions, 8980 flow [2022-12-13 11:45:27,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 559 transitions, 8780 flow, removed 43 selfloop flow, removed 6 redundant places. [2022-12-13 11:45:27,977 INFO L231 Difference]: Finished difference. Result has 310 places, 277 transitions, 4666 flow [2022-12-13 11:45:27,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4666, PETRI_PLACES=310, PETRI_TRANSITIONS=277} [2022-12-13 11:45:27,977 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2022-12-13 11:45:27,977 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 277 transitions, 4666 flow [2022-12-13 11:45:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 156.61111111111111) internal successors, (2819), 18 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:27,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:27,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:27,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (38)] Ended with exit code 0 [2022-12-13 11:45:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:45:28,179 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:45:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1885232731, now seen corresponding path program 1 times [2022-12-13 11:45:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:45:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046374346] [2022-12-13 11:45:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:28,182 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 11:45:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:45:28,185 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:45:28,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (39)] Waiting until timeout for monitored process [2022-12-13 11:45:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:45:28,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:28,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:28,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:45:28,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046374346] [2022-12-13 11:45:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046374346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:28,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:45:28,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 11:45:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830827759] [2022-12-13 11:45:28,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:28,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:45:28,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:45:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:45:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:45:30,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2022-12-13 11:45:30,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 277 transitions, 4666 flow. Second operand has 12 states, 12 states have (on average 161.91666666666666) internal successors, (1943), 12 states have internal predecessors, (1943), 0 states have call successors, (0), 0 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 11:45:30,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:30,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2022-12-13 11:45:30,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:45,829 INFO L130 PetriNetUnfolder]: 30489/56940 cut-off events. [2022-12-13 11:45:45,829 INFO L131 PetriNetUnfolder]: For 404816/404816 co-relation queries the response was YES. [2022-12-13 11:45:46,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263579 conditions, 56940 events. 30489/56940 cut-off events. For 404816/404816 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 542943 event pairs, 5566 based on Foata normal form. 190/57130 useless extension candidates. Maximal degree in co-relation 263471. Up to 22685 conditions per place. [2022-12-13 11:45:46,595 INFO L137 encePairwiseOnDemand]: 387/399 looper letters, 264 selfloop transitions, 126 changer transitions 0/390 dead transitions. [2022-12-13 11:45:46,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 390 transitions, 6417 flow [2022-12-13 11:45:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:45:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 11:45:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2674 transitions. [2022-12-13 11:45:46,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41885964912280704 [2022-12-13 11:45:46,600 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2674 transitions. [2022-12-13 11:45:46,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2674 transitions. [2022-12-13 11:45:46,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:46,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2674 transitions. [2022-12-13 11:45:46,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.125) internal successors, (2674), 16 states have internal predecessors, (2674), 0 states have call successors, (0), 0 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 11:45:46,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:45:46,607 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 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 11:45:46,607 INFO L175 Difference]: Start difference. First operand has 310 places, 277 transitions, 4666 flow. Second operand 16 states and 2674 transitions. [2022-12-13 11:45:46,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 390 transitions, 6417 flow [2022-12-13 11:45:51,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 390 transitions, 6360 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 11:45:51,445 INFO L231 Difference]: Finished difference. Result has 322 places, 279 transitions, 4985 flow [2022-12-13 11:45:51,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4985, PETRI_PLACES=322, PETRI_TRANSITIONS=279} [2022-12-13 11:45:51,446 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2022-12-13 11:45:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 279 transitions, 4985 flow [2022-12-13 11:45:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.91666666666666) internal successors, (1943), 12 states have internal predecessors, (1943), 0 states have call successors, (0), 0 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 11:45:51,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:51,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:51,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (39)] Ended with exit code 0 [2022-12-13 11:45:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:45:51,647 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:45:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1116554651, now seen corresponding path program 1 times [2022-12-13 11:45:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:45:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547217266] [2022-12-13 11:45:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:51,650 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 11:45:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:45:51,653 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:45:51,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (40)] Waiting until timeout for monitored process [2022-12-13 11:45:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:45:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:51,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 11:45:52,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-13 11:45:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:45:52,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:45:52,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:45:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547217266] [2022-12-13 11:45:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547217266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:52,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 11:45:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463570305] [2022-12-13 11:45:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:45:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:45:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:45:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:45:55,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:45:55,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2022-12-13 11:45:55,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 279 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 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 11:45:55,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:55,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2022-12-13 11:45:55,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:58,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:46:12,421 INFO L130 PetriNetUnfolder]: 30621/57732 cut-off events. [2022-12-13 11:46:12,421 INFO L131 PetriNetUnfolder]: For 447067/447067 co-relation queries the response was YES. [2022-12-13 11:46:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287189 conditions, 57732 events. 30621/57732 cut-off events. For 447067/447067 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 559742 event pairs, 14138 based on Foata normal form. 264/57996 useless extension candidates. Maximal degree in co-relation 287077. Up to 53291 conditions per place. [2022-12-13 11:46:13,182 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 206 selfloop transitions, 99 changer transitions 7/312 dead transitions. [2022-12-13 11:46:13,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 312 transitions, 5902 flow [2022-12-13 11:46:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:46:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:46:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2022-12-13 11:46:13,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4218880534670008 [2022-12-13 11:46:13,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2022-12-13 11:46:13,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2022-12-13 11:46:13,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:13,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2022-12-13 11:46:13,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 11:46:13,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 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 11:46:13,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 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 11:46:13,188 INFO L175 Difference]: Start difference. First operand has 322 places, 279 transitions, 4985 flow. Second operand 6 states and 1010 transitions. [2022-12-13 11:46:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 312 transitions, 5902 flow [2022-12-13 11:46:18,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 312 transitions, 5787 flow, removed 2 selfloop flow, removed 12 redundant places. [2022-12-13 11:46:18,985 INFO L231 Difference]: Finished difference. Result has 317 places, 294 transitions, 5365 flow [2022-12-13 11:46:18,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=4870, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5365, PETRI_PLACES=317, PETRI_TRANSITIONS=294} [2022-12-13 11:46:18,986 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2022-12-13 11:46:18,986 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 294 transitions, 5365 flow [2022-12-13 11:46:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 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 11:46:18,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:46:18,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:46:18,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (40)] Ended with exit code 0 [2022-12-13 11:46:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:46:19,187 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 11:46:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -844419639, now seen corresponding path program 1 times [2022-12-13 11:46:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:46:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807356260] [2022-12-13 11:46:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:19,190 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 11:46:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:46:19,193 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 11:46:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478bf341-430d-4fa2-b295-eeceebab0113/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 (41)] Waiting until timeout for monitored process [2022-12-13 11:46:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:46:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:46:19,657 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:46:19,657 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 15 treesize of output 11 [2022-12-13 11:46:19,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:46:19,706 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 15 treesize of output 19 [2022-12-13 11:46:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:20,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:46:26,330 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 374 DAG size of output: 278 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 11:46:26,332 INFO L321 Elim1Store]: treesize reduction 380, result has 74.1 percent of original size [2022-12-13 11:46:26,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 244 treesize of output 1188 [2022-12-13 11:46:26,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:46:26,641 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 87 treesize of output 92 [2022-12-13 11:46:26,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:46:26,821 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 83 treesize of output 90