./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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-4e7fbc6 [2022-11-23 03:52:28,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:52:28,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:52:28,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:52:28,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:52:28,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:52:28,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:52:28,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:52:28,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:52:28,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:52:28,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:52:28,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:52:28,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:52:28,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:52:28,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:52:28,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:52:28,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:52:28,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:52:28,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:52:28,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:52:28,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:52:28,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:52:28,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:52:28,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:52:28,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:52:28,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:52:28,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:52:28,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:52:28,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:52:28,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:52:28,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:52:29,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:52:29,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:52:29,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:52:29,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:52:29,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:52:29,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:52:29,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:52:29,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:52:29,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:52:29,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:52:29,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:52:29,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:52:29,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:52:29,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:52:29,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:52:29,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:52:29,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:52:29,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:52:29,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:52:29,076 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:52:29,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:52:29,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:52:29,078 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:52:29,079 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:52:29,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:52:29,079 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:52:29,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:52:29,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:52:29,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:52:29,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:52:29,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:52:29,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:52:29,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:52:29,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:52:29,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:52:29,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:52:29,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:52:29,082 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:52:29,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:52:29,082 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-23 03:52:29,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:52:29,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:52:29,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:52:29,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:52:29,429 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:52:29,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:52:32,537 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:52:32,803 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:52:32,803 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:52:32,809 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/198ac1130/e24d5d8ac2254873895a2b5212c24d3a/FLAG9dbf040e9 [2022-11-23 03:52:32,824 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/198ac1130/e24d5d8ac2254873895a2b5212c24d3a [2022-11-23 03:52:32,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:52:32,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:52:32,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:52:32,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:52:32,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:52:32,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:32" (1/1) ... [2022-11-23 03:52:32,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a722295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:32, skipping insertion in model container [2022-11-23 03:52:32,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:32" (1/1) ... [2022-11-23 03:52:32,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:52:32,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:52:33,034 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:52:33,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:52:33,055 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 03:52:33,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cbebbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:33, skipping insertion in model container [2022-11-23 03:52:33,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:52:33,056 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 03:52:33,058 INFO L158 Benchmark]: Toolchain (without parser) took 229.23ms. Allocated memory is still 155.2MB. Free memory was 124.7MB in the beginning and 114.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 03:52:33,059 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:52:33,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.80ms. Allocated memory is still 155.2MB. Free memory was 124.4MB in the beginning and 114.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 03:52:33,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.80ms. Allocated memory is still 155.2MB. Free memory was 124.4MB in the beginning and 114.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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-4e7fbc6 [2022-11-23 03:52:35,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:52:35,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:52:35,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:52:35,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:52:35,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:52:35,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:52:35,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:52:35,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:52:35,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:52:35,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:52:35,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:52:35,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:52:35,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:52:35,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:52:35,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:52:35,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:52:35,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:52:35,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:52:35,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:52:35,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:52:35,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:52:35,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:52:35,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:52:35,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:52:35,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:52:35,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:52:35,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:52:35,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:52:35,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:52:35,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:52:35,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:52:35,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:52:35,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:52:35,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:52:35,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:52:35,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:52:35,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:52:35,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:52:35,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:52:35,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:52:35,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 03:52:35,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:52:35,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:52:35,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:52:35,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:52:35,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:52:35,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:52:35,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:52:35,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:52:35,471 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:52:35,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:52:35,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:52:35,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:52:35,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:52:35,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:52:35,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:52:35,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:52:35,473 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:52:35,473 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:52:35,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:52:35,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:52:35,474 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 03:52:35,474 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 03:52:35,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:52:35,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:52:35,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:52:35,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:52:35,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:52:35,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:52:35,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:52:35,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:52:35,477 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 03:52:35,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 03:52:35,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:52:35,478 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:52:35,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:52:35,479 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 03:52:35,479 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-23 03:52:35,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:52:35,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:52:35,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:52:35,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:52:35,908 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:52:35,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:52:39,042 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:52:39,345 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:52:39,346 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-23 03:52:39,356 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/2a4e44925/7cb13aba149c4e86bab944b43f5f9fdf/FLAG4dff61c91 [2022-11-23 03:52:39,376 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/data/2a4e44925/7cb13aba149c4e86bab944b43f5f9fdf [2022-11-23 03:52:39,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:52:39,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:52:39,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:52:39,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:52:39,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:52:39,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52435e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39, skipping insertion in model container [2022-11-23 03:52:39,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:52:39,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:52:39,605 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:52:39,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:52:39,633 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 03:52:39,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:52:39,656 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:52:39,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:52:39,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:52:39,694 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_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-23 03:52:39,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:52:39,733 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:52:39,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39 WrapperNode [2022-11-23 03:52:39,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:52:39,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:52:39,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:52:39,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:52:39,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,813 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 122 [2022-11-23 03:52:39,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:52:39,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:52:39,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:52:39,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:52:39,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,867 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:52:39,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:52:39,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:52:39,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:52:39,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (1/1) ... [2022-11-23 03:52:39,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:52:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:52:39,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:52:39,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:52:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:52:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 03:52:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:52:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 03:52:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:52:40,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:52:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:52:40,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:52:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:52:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:52:40,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:52:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:52:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 03:52:40,018 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:52:40,204 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:52:40,206 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:52:40,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:52:40,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:52:40,916 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:52:40,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:40 BoogieIcfgContainer [2022-11-23 03:52:40,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:52:40,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:52:40,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:52:40,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:52:40,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:52:39" (1/3) ... [2022-11-23 03:52:40,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3a42c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:40, skipping insertion in model container [2022-11-23 03:52:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:39" (2/3) ... [2022-11-23 03:52:40,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3a42c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:40, skipping insertion in model container [2022-11-23 03:52:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:40" (3/3) ... [2022-11-23 03:52:40,929 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-23 03:52:40,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:52:40,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-23 03:52:40,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:52:41,092 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:52:41,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 252 transitions, 520 flow [2022-11-23 03:52:41,221 INFO L130 PetriNetUnfolder]: 21/250 cut-off events. [2022-11-23 03:52:41,221 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:52:41,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 21/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 396 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-11-23 03:52:41,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 252 transitions, 520 flow [2022-11-23 03:52:41,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 245 transitions, 502 flow [2022-11-23 03:52:41,243 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:52:41,266 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 245 transitions, 502 flow [2022-11-23 03:52:41,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 245 transitions, 502 flow [2022-11-23 03:52:41,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 245 transitions, 502 flow [2022-11-23 03:52:41,397 INFO L130 PetriNetUnfolder]: 21/245 cut-off events. [2022-11-23 03:52:41,397 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:52:41,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 21/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 398 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-11-23 03:52:41,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2022-11-23 03:53:18,637 INFO L134 LiptonReduction]: Checked pairs total: 7464 [2022-11-23 03:53:18,637 INFO L136 LiptonReduction]: Total number of compositions: 286 [2022-11-23 03:53:18,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:53:18,659 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;@1053998d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:53:18,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-23 03:53:18,663 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 03:53:18,663 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:53:18,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:18,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:53:18,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 31268, now seen corresponding path program 1 times [2022-11-23 03:53:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:18,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193276559] [2022-11-23 03:53:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:18,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:18,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:18,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 03:53:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:53:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:18,923 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:53:18,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:53:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:18,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:18,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193276559] [2022-11-23 03:53:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193276559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:18,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:18,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:53:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791230385] [2022-11-23 03:53:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:53:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:53:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:53:19,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 538 [2022-11-23 03:53:19,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:19,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:19,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 538 [2022-11-23 03:53:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:19,777 INFO L130 PetriNetUnfolder]: 897/1382 cut-off events. [2022-11-23 03:53:19,778 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-23 03:53:19,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2806 conditions, 1382 events. 897/1382 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6180 event pairs, 679 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2648. Up to 1382 conditions per place. [2022-11-23 03:53:19,793 INFO L137 encePairwiseOnDemand]: 530/538 looper letters, 46 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-11-23 03:53:19,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 200 flow [2022-11-23 03:53:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2022-11-23 03:53:19,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45353159851301117 [2022-11-23 03:53:19,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2022-11-23 03:53:19,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2022-11-23 03:53:19,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:19,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2022-11-23 03:53:19,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:19,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:19,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:19,843 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 120 flow. Second operand 3 states and 732 transitions. [2022-11-23 03:53:19,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 200 flow [2022-11-23 03:53:19,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:53:19,854 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 100 flow [2022-11-23 03:53:19,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=98, 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=100, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-23 03:53:19,862 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2022-11-23 03:53:19,862 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 100 flow [2022-11-23 03:53:19,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:19,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:19,864 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:53:19,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:20,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 31269, now seen corresponding path program 1 times [2022-11-23 03:53:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016696973] [2022-11-23 03:53:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:20,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:20,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:20,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 03:53:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:53:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:20,267 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:53:20,267 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 [2022-11-23 03:53:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:20,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:20,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016696973] [2022-11-23 03:53:20,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016696973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:20,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:20,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:53:20,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497905296] [2022-11-23 03:53:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:53:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:53:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:53:20,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 538 [2022-11-23 03:53:20,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:20,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:20,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 538 [2022-11-23 03:53:20,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:21,568 INFO L130 PetriNetUnfolder]: 1793/2761 cut-off events. [2022-11-23 03:53:21,569 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:53:21,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5556 conditions, 2761 events. 1793/2761 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 14348 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 5550. Up to 1383 conditions per place. [2022-11-23 03:53:21,584 INFO L137 encePairwiseOnDemand]: 532/538 looper letters, 87 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2022-11-23 03:53:21,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 91 transitions, 374 flow [2022-11-23 03:53:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2022-11-23 03:53:21,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47769516728624534 [2022-11-23 03:53:21,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2022-11-23 03:53:21,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2022-11-23 03:53:21,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:21,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2022-11-23 03:53:21,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:21,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:21,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:21,595 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 100 flow. Second operand 3 states and 771 transitions. [2022-11-23 03:53:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 91 transitions, 374 flow [2022-11-23 03:53:21,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 91 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:21,597 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 131 flow [2022-11-23 03:53:21,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2022-11-23 03:53:21,598 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2022-11-23 03:53:21,598 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 131 flow [2022-11-23 03:53:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:21,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:21,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:53:21,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:21,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:21,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash 977919, now seen corresponding path program 1 times [2022-11-23 03:53:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12849502] [2022-11-23 03:53:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:21,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:21,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:21,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 03:53:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:53:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:21,957 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 03:53:21,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 03:53:22,045 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:53:22,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:53:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:22,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:22,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:22,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12849502] [2022-11-23 03:53:22,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12849502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:22,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:22,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:53:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864403898] [2022-11-23 03:53:22,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:22,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:53:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:53:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:53:22,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 538 [2022-11-23 03:53:22,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:22,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:22,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 538 [2022-11-23 03:53:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:22,923 INFO L130 PetriNetUnfolder]: 1345/2115 cut-off events. [2022-11-23 03:53:22,924 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:53:22,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 2115 events. 1345/2115 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10728 event pairs, 1008 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 4269. Up to 2115 conditions per place. [2022-11-23 03:53:22,934 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 47 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2022-11-23 03:53:22,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 223 flow [2022-11-23 03:53:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-23 03:53:22,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4547707558859975 [2022-11-23 03:53:22,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-23 03:53:22,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-23 03:53:22,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:22,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-23 03:53:22,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:22,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:22,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:22,945 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 131 flow. Second operand 3 states and 734 transitions. [2022-11-23 03:53:22,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 223 flow [2022-11-23 03:53:22,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:53:22,947 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 121 flow [2022-11-23 03:53:22,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2022-11-23 03:53:22,954 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2022-11-23 03:53:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 121 flow [2022-11-23 03:53:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:22,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:22,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:53:22,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:23,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:23,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 977921, now seen corresponding path program 1 times [2022-11-23 03:53:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:23,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054263643] [2022-11-23 03:53:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:23,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:23,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:23,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 03:53:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:53:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:23,328 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:53:23,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 03:53:23,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:53:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:23,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:53:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:23,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:23,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054263643] [2022-11-23 03:53:23,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054263643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:23,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:23,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:53:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695825362] [2022-11-23 03:53:23,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:53:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:53:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:53:23,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 538 [2022-11-23 03:53:23,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:23,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:23,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 538 [2022-11-23 03:53:23,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:24,406 INFO L130 PetriNetUnfolder]: 897/1469 cut-off events. [2022-11-23 03:53:24,406 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:53:24,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1469 events. 897/1469 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7349 event pairs, 658 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 2974. Up to 1469 conditions per place. [2022-11-23 03:53:24,414 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-11-23 03:53:24,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 209 flow [2022-11-23 03:53:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2022-11-23 03:53:24,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45353159851301117 [2022-11-23 03:53:24,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2022-11-23 03:53:24,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2022-11-23 03:53:24,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:24,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2022-11-23 03:53:24,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:24,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:24,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:24,426 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 121 flow. Second operand 3 states and 732 transitions. [2022-11-23 03:53:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 209 flow [2022-11-23 03:53:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:24,429 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 118 flow [2022-11-23 03:53:24,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2022-11-23 03:53:24,431 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2022-11-23 03:53:24,431 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 118 flow [2022-11-23 03:53:24,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:24,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:24,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:53:24,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:53:24,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:24,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 976738, now seen corresponding path program 1 times [2022-11-23 03:53:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987917620] [2022-11-23 03:53:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:24,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:24,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:24,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 03:53:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:53:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:24,822 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:53:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:53:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:24,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:53:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:25,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:25,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987917620] [2022-11-23 03:53:25,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987917620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:53:25,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:53:25,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 03:53:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412453411] [2022-11-23 03:53:25,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:53:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:53:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:53:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:53:26,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 538 [2022-11-23 03:53:26,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:26,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:26,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 538 [2022-11-23 03:53:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:28,736 INFO L130 PetriNetUnfolder]: 1349/2210 cut-off events. [2022-11-23 03:53:28,736 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-23 03:53:28,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4490 conditions, 2210 events. 1349/2210 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 11888 event pairs, 987 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 4480. Up to 736 conditions per place. [2022-11-23 03:53:28,751 INFO L137 encePairwiseOnDemand]: 531/538 looper letters, 116 selfloop transitions, 15 changer transitions 0/131 dead transitions. [2022-11-23 03:53:28,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 131 transitions, 576 flow [2022-11-23 03:53:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:53:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:53:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1433 transitions. [2022-11-23 03:53:28,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44392812887236677 [2022-11-23 03:53:28,756 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1433 transitions. [2022-11-23 03:53:28,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1433 transitions. [2022-11-23 03:53:28,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:28,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1433 transitions. [2022-11-23 03:53:28,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.83333333333334) internal successors, (1433), 6 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:28,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:28,769 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:28,770 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 118 flow. Second operand 6 states and 1433 transitions. [2022-11-23 03:53:28,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 131 transitions, 576 flow [2022-11-23 03:53:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 131 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:28,773 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 230 flow [2022-11-23 03:53:28,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2022-11-23 03:53:28,774 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2022-11-23 03:53:28,774 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 230 flow [2022-11-23 03:53:28,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:28,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:28,775 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:53:28,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:28,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash 939802761, now seen corresponding path program 1 times [2022-11-23 03:53:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827292490] [2022-11-23 03:53:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:28,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 03:53:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:53:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:29,123 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 03:53:29,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-23 03:53:29,161 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:53:29,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:53:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:29,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:29,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827292490] [2022-11-23 03:53:29,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827292490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:29,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:29,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:53:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269279842] [2022-11-23 03:53:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:29,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:53:29,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:53:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:53:29,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 538 [2022-11-23 03:53:29,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:29,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:29,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 538 [2022-11-23 03:53:29,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:29,891 INFO L130 PetriNetUnfolder]: 1277/2075 cut-off events. [2022-11-23 03:53:29,892 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-23 03:53:29,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2075 events. 1277/2075 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10966 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 4250. Up to 2075 conditions per place. [2022-11-23 03:53:29,930 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-11-23 03:53:29,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 336 flow [2022-11-23 03:53:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-11-23 03:53:29,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4485749690210657 [2022-11-23 03:53:29,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-11-23 03:53:29,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-11-23 03:53:29,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:29,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-11-23 03:53:29,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:29,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:29,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:29,943 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 230 flow. Second operand 3 states and 724 transitions. [2022-11-23 03:53:29,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 336 flow [2022-11-23 03:53:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 317 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:29,946 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 209 flow [2022-11-23 03:53:29,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2022-11-23 03:53:29,947 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2022-11-23 03:53:29,948 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 209 flow [2022-11-23 03:53:29,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:29,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:29,949 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:53:29,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:30,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:30,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 939802760, now seen corresponding path program 1 times [2022-11-23 03:53:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423001005] [2022-11-23 03:53:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:30,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:30,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:30,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 03:53:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:53:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:30,326 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-23 03:53:30,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-23 03:53:30,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-23 03:53:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:53:30,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:53:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:30,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:30,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423001005] [2022-11-23 03:53:30,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423001005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:30,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:30,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:53:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619347261] [2022-11-23 03:53:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:30,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:53:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:53:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:53:31,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 538 [2022-11-23 03:53:31,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:31,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:31,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 538 [2022-11-23 03:53:31,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:31,639 INFO L130 PetriNetUnfolder]: 1205/1940 cut-off events. [2022-11-23 03:53:31,639 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-23 03:53:31,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1940 events. 1205/1940 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 9974 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3970. Up to 1940 conditions per place. [2022-11-23 03:53:31,659 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-23 03:53:31,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 311 flow [2022-11-23 03:53:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:53:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:53:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-11-23 03:53:31,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4473358116480793 [2022-11-23 03:53:31,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-11-23 03:53:31,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-11-23 03:53:31,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:31,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-11-23 03:53:31,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:31,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:31,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:31,668 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 209 flow. Second operand 3 states and 722 transitions. [2022-11-23 03:53:31,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 311 flow [2022-11-23 03:53:31,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:31,671 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 206 flow [2022-11-23 03:53:31,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2022-11-23 03:53:31,672 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2022-11-23 03:53:31,672 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 206 flow [2022-11-23 03:53:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:31,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:31,673 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:53:31,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:31,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:31,885 INFO L85 PathProgramCache]: Analyzing trace with hash -930886024, now seen corresponding path program 1 times [2022-11-23 03:53:31,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:31,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811118511] [2022-11-23 03:53:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:31,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:31,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:31,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 03:53:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:53:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:31,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 03:53:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:32,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:32,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811118511] [2022-11-23 03:53:32,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811118511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:32,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:32,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:53:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066051815] [2022-11-23 03:53:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:53:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:53:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:53:32,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2022-11-23 03:53:32,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:32,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:32,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2022-11-23 03:53:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:33,582 INFO L130 PetriNetUnfolder]: 2201/3560 cut-off events. [2022-11-23 03:53:33,582 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-23 03:53:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7263 conditions, 3560 events. 2201/3560 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 21442 event pairs, 873 based on Foata normal form. 0/1591 useless extension candidates. Maximal degree in co-relation 7246. Up to 1922 conditions per place. [2022-11-23 03:53:33,597 INFO L137 encePairwiseOnDemand]: 533/538 looper letters, 71 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2022-11-23 03:53:33,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 427 flow [2022-11-23 03:53:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:53:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:53:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1178 transitions. [2022-11-23 03:53:33,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4379182156133829 [2022-11-23 03:53:33,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1178 transitions. [2022-11-23 03:53:33,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1178 transitions. [2022-11-23 03:53:33,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:33,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1178 transitions. [2022-11-23 03:53:33,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:33,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:33,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:33,610 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 206 flow. Second operand 5 states and 1178 transitions. [2022-11-23 03:53:33,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 427 flow [2022-11-23 03:53:33,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:53:33,613 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 233 flow [2022-11-23 03:53:33,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2022-11-23 03:53:33,614 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2022-11-23 03:53:33,614 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 233 flow [2022-11-23 03:53:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:33,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:33,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:53:33,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:33,823 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -930886184, now seen corresponding path program 1 times [2022-11-23 03:53:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:33,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675599751] [2022-11-23 03:53:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:53:33,824 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 [2022-11-23 03:53:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:33,826 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 03:53:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:53:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:53:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:33,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:53:33,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675599751] [2022-11-23 03:53:33,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675599751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:53:33,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:53:33,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:53:33,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358747120] [2022-11-23 03:53:33,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:53:33,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:53:33,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:53:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:53:34,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 538 [2022-11-23 03:53:34,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:34,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:34,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 538 [2022-11-23 03:53:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:35,464 INFO L130 PetriNetUnfolder]: 2554/4210 cut-off events. [2022-11-23 03:53:35,465 INFO L131 PetriNetUnfolder]: For 460/460 co-relation queries the response was YES. [2022-11-23 03:53:35,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 4210 events. 2554/4210 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25435 event pairs, 1782 based on Foata normal form. 0/2218 useless extension candidates. Maximal degree in co-relation 8888. Up to 3559 conditions per place. [2022-11-23 03:53:35,491 INFO L137 encePairwiseOnDemand]: 530/538 looper letters, 93 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2022-11-23 03:53:35,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 569 flow [2022-11-23 03:53:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:53:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:53:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2022-11-23 03:53:35,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4449814126394052 [2022-11-23 03:53:35,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2022-11-23 03:53:35,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2022-11-23 03:53:35,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:53:35,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2022-11-23 03:53:35,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:35,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:35,506 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:35,507 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 233 flow. Second operand 5 states and 1197 transitions. [2022-11-23 03:53:35,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 569 flow [2022-11-23 03:53:35,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 544 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:53:35,515 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 240 flow [2022-11-23 03:53:35,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-11-23 03:53:35,518 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2022-11-23 03:53:35,518 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 240 flow [2022-11-23 03:53:35,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:35,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:53:35,519 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 03:53:35,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:53:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:35,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:53:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:53:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash -959422107, now seen corresponding path program 2 times [2022-11-23 03:53:35,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:53:35,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558628510] [2022-11-23 03:53:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:53:35,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:53:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:53:35,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:53:35,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 03:53:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:53:35,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:53:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:53:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:53:35,897 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:53:35,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:53:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:36,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:53:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:53:36,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:53:36,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558628510] [2022-11-23 03:53:36,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558628510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:53:36,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:53:36,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 03:53:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167597733] [2022-11-23 03:53:36,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:53:36,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:53:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:53:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:53:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:53:43,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 538 [2022-11-23 03:53:43,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:53:43,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:53:43,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 538 [2022-11-23 03:53:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:53:47,235 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 [] [2022-11-23 03:53:49,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:50,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:52,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:53:55,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:54:01,258 INFO L130 PetriNetUnfolder]: 6796/11194 cut-off events. [2022-11-23 03:54:01,258 INFO L131 PetriNetUnfolder]: For 1459/1459 co-relation queries the response was YES. [2022-11-23 03:54:01,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24832 conditions, 11194 events. 6796/11194 cut-off events. For 1459/1459 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 75482 event pairs, 5184 based on Foata normal form. 12/6143 useless extension candidates. Maximal degree in co-relation 24811. Up to 1680 conditions per place. [2022-11-23 03:54:01,328 INFO L137 encePairwiseOnDemand]: 531/538 looper letters, 284 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2022-11-23 03:54:01,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 313 transitions, 1658 flow [2022-11-23 03:54:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:54:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:54:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3140 transitions. [2022-11-23 03:54:01,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44895624821275376 [2022-11-23 03:54:01,341 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3140 transitions. [2022-11-23 03:54:01,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3140 transitions. [2022-11-23 03:54:01,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:01,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3140 transitions. [2022-11-23 03:54:01,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.53846153846155) internal successors, (3140), 13 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:01,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 538.0) internal successors, (7532), 14 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:01,377 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 538.0) internal successors, (7532), 14 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:01,387 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 240 flow. Second operand 13 states and 3140 transitions. [2022-11-23 03:54:01,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 313 transitions, 1658 flow [2022-11-23 03:54:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 313 transitions, 1652 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 03:54:01,400 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 442 flow [2022-11-23 03:54:01,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=442, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2022-11-23 03:54:01,403 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2022-11-23 03:54:01,403 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 442 flow [2022-11-23 03:54:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:01,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:01,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:01,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:01,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 351229078, now seen corresponding path program 1 times [2022-11-23 03:54:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997764829] [2022-11-23 03:54:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:01,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:01,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 03:54:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:54:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:01,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:01,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997764829] [2022-11-23 03:54:01,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997764829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:01,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:01,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:54:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959093739] [2022-11-23 03:54:01,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:01,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:54:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:54:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:54:02,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 538 [2022-11-23 03:54:02,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:02,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:02,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 538 [2022-11-23 03:54:02,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:04,275 INFO L130 PetriNetUnfolder]: 6182/10228 cut-off events. [2022-11-23 03:54:04,275 INFO L131 PetriNetUnfolder]: For 1451/1451 co-relation queries the response was YES. [2022-11-23 03:54:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22786 conditions, 10228 events. 6182/10228 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 68886 event pairs, 4614 based on Foata normal form. 16/5675 useless extension candidates. Maximal degree in co-relation 22756. Up to 9790 conditions per place. [2022-11-23 03:54:04,342 INFO L137 encePairwiseOnDemand]: 530/538 looper letters, 92 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2022-11-23 03:54:04,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 749 flow [2022-11-23 03:54:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:54:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:54:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1194 transitions. [2022-11-23 03:54:04,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44386617100371745 [2022-11-23 03:54:04,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1194 transitions. [2022-11-23 03:54:04,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1194 transitions. [2022-11-23 03:54:04,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:04,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1194 transitions. [2022-11-23 03:54:04,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:04,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:04,358 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:04,358 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 442 flow. Second operand 5 states and 1194 transitions. [2022-11-23 03:54:04,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 749 flow [2022-11-23 03:54:04,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 684 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-23 03:54:04,370 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 459 flow [2022-11-23 03:54:04,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=459, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-11-23 03:54:04,371 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2022-11-23 03:54:04,371 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 459 flow [2022-11-23 03:54:04,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:04,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:04,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:04,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:04,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:04,585 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1227141384, now seen corresponding path program 1 times [2022-11-23 03:54:04,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:04,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688934460] [2022-11-23 03:54:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:04,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:04,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:04,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 03:54:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:54:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:54:04,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:04,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:04,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688934460] [2022-11-23 03:54:04,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688934460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:04,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:04,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:54:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564939096] [2022-11-23 03:54:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:54:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:54:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:54:05,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 538 [2022-11-23 03:54:05,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:05,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:05,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 538 [2022-11-23 03:54:05,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:07,112 INFO L130 PetriNetUnfolder]: 5654/9444 cut-off events. [2022-11-23 03:54:07,112 INFO L131 PetriNetUnfolder]: For 2332/2332 co-relation queries the response was YES. [2022-11-23 03:54:07,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22180 conditions, 9444 events. 5654/9444 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 63706 event pairs, 4162 based on Foata normal form. 0/5356 useless extension candidates. Maximal degree in co-relation 22147. Up to 8506 conditions per place. [2022-11-23 03:54:07,179 INFO L137 encePairwiseOnDemand]: 529/538 looper letters, 106 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2022-11-23 03:54:07,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 861 flow [2022-11-23 03:54:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:54:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:54:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1186 transitions. [2022-11-23 03:54:07,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4408921933085502 [2022-11-23 03:54:07,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1186 transitions. [2022-11-23 03:54:07,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1186 transitions. [2022-11-23 03:54:07,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:07,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1186 transitions. [2022-11-23 03:54:07,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:07,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:07,195 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:07,195 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 459 flow. Second operand 5 states and 1186 transitions. [2022-11-23 03:54:07,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 861 flow [2022-11-23 03:54:07,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 822 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-23 03:54:07,211 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 453 flow [2022-11-23 03:54:07,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-11-23 03:54:07,213 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2022-11-23 03:54:07,214 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 453 flow [2022-11-23 03:54:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:07,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:07,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:07,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:07,434 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2020778371, now seen corresponding path program 1 times [2022-11-23 03:54:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:07,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891205552] [2022-11-23 03:54:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:07,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:07,437 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:07,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 03:54:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:54:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:07,668 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:54:07,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:54:07,710 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:54:07,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:54:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:54:07,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:07,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891205552] [2022-11-23 03:54:07,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891205552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:07,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:07,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:54:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956416086] [2022-11-23 03:54:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:54:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:54:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:54:08,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 538 [2022-11-23 03:54:08,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 453 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:08,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:08,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 538 [2022-11-23 03:54:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:09,426 INFO L130 PetriNetUnfolder]: 4408/7402 cut-off events. [2022-11-23 03:54:09,426 INFO L131 PetriNetUnfolder]: For 2943/2943 co-relation queries the response was YES. [2022-11-23 03:54:09,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19278 conditions, 7402 events. 4408/7402 cut-off events. For 2943/2943 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47677 event pairs, 3308 based on Foata normal form. 0/5378 useless extension candidates. Maximal degree in co-relation 19243. Up to 7389 conditions per place. [2022-11-23 03:54:09,464 INFO L137 encePairwiseOnDemand]: 533/538 looper letters, 60 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2022-11-23 03:54:09,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 585 flow [2022-11-23 03:54:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:54:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:54:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 903 transitions. [2022-11-23 03:54:09,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41960966542750927 [2022-11-23 03:54:09,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 903 transitions. [2022-11-23 03:54:09,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 903 transitions. [2022-11-23 03:54:09,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:09,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 903 transitions. [2022-11-23 03:54:09,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.75) internal successors, (903), 4 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:09,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:09,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:09,477 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 453 flow. Second operand 4 states and 903 transitions. [2022-11-23 03:54:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 585 flow [2022-11-23 03:54:09,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:54:09,505 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 460 flow [2022-11-23 03:54:09,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=460, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2022-11-23 03:54:09,506 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2022-11-23 03:54:09,506 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 460 flow [2022-11-23 03:54:09,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:09,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:09,507 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:09,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:09,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:09,720 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2020778370, now seen corresponding path program 1 times [2022-11-23 03:54:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:09,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593201706] [2022-11-23 03:54:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:09,721 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 [2022-11-23 03:54:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:09,728 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 03:54:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:54:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:09,984 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:54:09,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:54:10,052 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:54:10,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:54:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:54:10,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 03:54:10,185 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:54:10,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:54:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:10,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:54:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:12,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593201706] [2022-11-23 03:54:12,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593201706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:54:12,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:54:12,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 03:54:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327014667] [2022-11-23 03:54:12,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:54:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:54:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:54:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:54:20,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 538 [2022-11-23 03:54:20,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 460 flow. Second operand has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:20,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:20,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 538 [2022-11-23 03:54:20,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:36,379 INFO L130 PetriNetUnfolder]: 11768/19668 cut-off events. [2022-11-23 03:54:36,379 INFO L131 PetriNetUnfolder]: For 6697/6697 co-relation queries the response was YES. [2022-11-23 03:54:36,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50942 conditions, 19668 events. 11768/19668 cut-off events. For 6697/6697 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 148036 event pairs, 2450 based on Foata normal form. 0/14380 useless extension candidates. Maximal degree in co-relation 50907. Up to 4177 conditions per place. [2022-11-23 03:54:36,694 INFO L137 encePairwiseOnDemand]: 524/538 looper letters, 528 selfloop transitions, 93 changer transitions 0/621 dead transitions. [2022-11-23 03:54:36,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 621 transitions, 3594 flow [2022-11-23 03:54:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 03:54:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 03:54:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7333 transitions. [2022-11-23 03:54:36,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4130336825504112 [2022-11-23 03:54:36,715 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7333 transitions. [2022-11-23 03:54:36,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7333 transitions. [2022-11-23 03:54:36,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:36,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7333 transitions. [2022-11-23 03:54:36,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 222.21212121212122) internal successors, (7333), 33 states have internal predecessors, (7333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:36,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 538.0) internal successors, (18292), 34 states have internal predecessors, (18292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:36,768 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 538.0) internal successors, (18292), 34 states have internal predecessors, (18292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:36,768 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 460 flow. Second operand 33 states and 7333 transitions. [2022-11-23 03:54:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 621 transitions, 3594 flow [2022-11-23 03:54:36,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 621 transitions, 3581 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:54:36,922 INFO L231 Difference]: Finished difference. Result has 117 places, 149 transitions, 1171 flow [2022-11-23 03:54:36,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1171, PETRI_PLACES=117, PETRI_TRANSITIONS=149} [2022-11-23 03:54:36,922 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2022-11-23 03:54:36,923 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 149 transitions, 1171 flow [2022-11-23 03:54:36,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:36,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:36,924 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:36,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-23 03:54:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:37,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2020778212, now seen corresponding path program 1 times [2022-11-23 03:54:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437761389] [2022-11-23 03:54:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:37,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:37,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:37,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-23 03:54:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:54:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:37,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:54:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:54:37,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:37,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437761389] [2022-11-23 03:54:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437761389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:37,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:37,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:54:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701311515] [2022-11-23 03:54:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:37,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:54:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:54:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:54:37,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 538 [2022-11-23 03:54:37,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 149 transitions, 1171 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:37,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:37,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 538 [2022-11-23 03:54:37,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:40,364 INFO L130 PetriNetUnfolder]: 8618/14466 cut-off events. [2022-11-23 03:54:40,364 INFO L131 PetriNetUnfolder]: For 15727/15727 co-relation queries the response was YES. [2022-11-23 03:54:40,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 14466 events. 8618/14466 cut-off events. For 15727/15727 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 102331 event pairs, 6182 based on Foata normal form. 0/12210 useless extension candidates. Maximal degree in co-relation 40842. Up to 14406 conditions per place. [2022-11-23 03:54:40,490 INFO L137 encePairwiseOnDemand]: 533/538 looper letters, 120 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2022-11-23 03:54:40,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 1306 flow [2022-11-23 03:54:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:54:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:54:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2022-11-23 03:54:40,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41775092936802977 [2022-11-23 03:54:40,494 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2022-11-23 03:54:40,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2022-11-23 03:54:40,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:40,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2022-11-23 03:54:40,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 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) [2022-11-23 03:54:40,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:40,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:40,501 INFO L175 Difference]: Start difference. First operand has 117 places, 149 transitions, 1171 flow. Second operand 4 states and 899 transitions. [2022-11-23 03:54:40,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 1306 flow [2022-11-23 03:54:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 132 transitions, 1176 flow, removed 47 selfloop flow, removed 3 redundant places. [2022-11-23 03:54:40,665 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 936 flow [2022-11-23 03:54:40,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=936, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2022-11-23 03:54:40,666 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2022-11-23 03:54:40,666 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 936 flow [2022-11-23 03:54:40,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:40,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:40,667 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:40,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:40,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:40,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1769989551, now seen corresponding path program 1 times [2022-11-23 03:54:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:40,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040152438] [2022-11-23 03:54:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:40,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:40,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 03:54:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:54:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:41,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 03:54:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:41,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:41,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040152438] [2022-11-23 03:54:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040152438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:41,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:41,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:54:41,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764648469] [2022-11-23 03:54:41,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:54:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:54:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:54:41,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2022-11-23 03:54:41,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 936 flow. Second operand has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:41,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:41,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2022-11-23 03:54:41,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:45,760 INFO L130 PetriNetUnfolder]: 12524/21152 cut-off events. [2022-11-23 03:54:45,760 INFO L131 PetriNetUnfolder]: For 23570/23570 co-relation queries the response was YES. [2022-11-23 03:54:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58161 conditions, 21152 events. 12524/21152 cut-off events. For 23570/23570 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 165303 event pairs, 5958 based on Foata normal form. 0/17768 useless extension candidates. Maximal degree in co-relation 58120. Up to 13958 conditions per place. [2022-11-23 03:54:45,952 INFO L137 encePairwiseOnDemand]: 533/538 looper letters, 178 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2022-11-23 03:54:45,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 203 transitions, 1775 flow [2022-11-23 03:54:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:54:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:54:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1162 transitions. [2022-11-23 03:54:45,958 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43197026022304835 [2022-11-23 03:54:45,958 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1162 transitions. [2022-11-23 03:54:45,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1162 transitions. [2022-11-23 03:54:45,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:45,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1162 transitions. [2022-11-23 03:54:45,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.4) internal successors, (1162), 5 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:45,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:45,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:45,968 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 936 flow. Second operand 5 states and 1162 transitions. [2022-11-23 03:54:45,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 203 transitions, 1775 flow [2022-11-23 03:54:46,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 1762 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:54:46,118 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 984 flow [2022-11-23 03:54:46,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=984, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2022-11-23 03:54:46,118 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2022-11-23 03:54:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 984 flow [2022-11-23 03:54:46,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:46,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:46,256 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:46,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:54:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:46,456 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1769989515, now seen corresponding path program 1 times [2022-11-23 03:54:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729722359] [2022-11-23 03:54:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:46,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:46,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:46,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 03:54:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 03:54:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:46,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 03:54:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:46,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:54:46,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:46,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729722359] [2022-11-23 03:54:46,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729722359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:54:46,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:54:46,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:54:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736406309] [2022-11-23 03:54:46,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:54:46,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:54:46,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:54:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:54:47,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 538 [2022-11-23 03:54:47,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 984 flow. Second operand has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:47,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:54:47,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 538 [2022-11-23 03:54:47,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:54:51,255 INFO L130 PetriNetUnfolder]: 12284/20768 cut-off events. [2022-11-23 03:54:51,255 INFO L131 PetriNetUnfolder]: For 29734/29734 co-relation queries the response was YES. [2022-11-23 03:54:51,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61484 conditions, 20768 events. 12284/20768 cut-off events. For 29734/29734 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 158267 event pairs, 9472 based on Foata normal form. 72/19244 useless extension candidates. Maximal degree in co-relation 61443. Up to 20293 conditions per place. [2022-11-23 03:54:51,440 INFO L137 encePairwiseOnDemand]: 530/538 looper letters, 140 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2022-11-23 03:54:51,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 158 transitions, 1404 flow [2022-11-23 03:54:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:54:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:54:51,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1140 transitions. [2022-11-23 03:54:51,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42379182156133827 [2022-11-23 03:54:51,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1140 transitions. [2022-11-23 03:54:51,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1140 transitions. [2022-11-23 03:54:51,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:54:51,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1140 transitions. [2022-11-23 03:54:51,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:51,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:51,450 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:51,450 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 984 flow. Second operand 5 states and 1140 transitions. [2022-11-23 03:54:51,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 158 transitions, 1404 flow [2022-11-23 03:54:51,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 158 transitions, 1355 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:54:51,592 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 1000 flow [2022-11-23 03:54:51,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1000, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2022-11-23 03:54:51,593 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2022-11-23 03:54:51,593 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 1000 flow [2022-11-23 03:54:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:54:51,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:54:51,594 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:54:51,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:54:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:51,803 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:54:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:54:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -641512867, now seen corresponding path program 1 times [2022-11-23 03:54:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:54:51,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282053989] [2022-11-23 03:54:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:54:51,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:54:51,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:54:51,805 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:54:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-23 03:54:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:54:51,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:54:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:54:52,075 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:54:52,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:54:52,147 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:54:52,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:54:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:54:52,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 03:54:52,291 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:54:52,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:54:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:52,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:54:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:54:57,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:54:57,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282053989] [2022-11-23 03:54:57,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282053989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:54:57,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:54:57,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 03:54:57,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420226403] [2022-11-23 03:54:57,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:54:57,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:54:57,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:54:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:54:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:55:03,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 538 [2022-11-23 03:55:03,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 1000 flow. Second operand has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:03,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:55:03,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 538 [2022-11-23 03:55:03,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:55:17,957 INFO L130 PetriNetUnfolder]: 11472/19424 cut-off events. [2022-11-23 03:55:17,957 INFO L131 PetriNetUnfolder]: For 35576/35576 co-relation queries the response was YES. [2022-11-23 03:55:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59851 conditions, 19424 events. 11472/19424 cut-off events. For 35576/35576 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 147153 event pairs, 7344 based on Foata normal form. 532/18416 useless extension candidates. Maximal degree in co-relation 59807. Up to 4464 conditions per place. [2022-11-23 03:55:18,153 INFO L137 encePairwiseOnDemand]: 528/538 looper letters, 444 selfloop transitions, 54 changer transitions 0/498 dead transitions. [2022-11-23 03:55:18,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 498 transitions, 3504 flow [2022-11-23 03:55:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:55:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:55:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5950 transitions. [2022-11-23 03:55:18,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40961035384827205 [2022-11-23 03:55:18,164 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5950 transitions. [2022-11-23 03:55:18,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5950 transitions. [2022-11-23 03:55:18,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:55:18,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5950 transitions. [2022-11-23 03:55:18,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 220.37037037037038) internal successors, (5950), 27 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:18,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 538.0) internal successors, (15064), 28 states have internal predecessors, (15064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:18,189 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 538.0) internal successors, (15064), 28 states have internal predecessors, (15064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:18,189 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 1000 flow. Second operand 27 states and 5950 transitions. [2022-11-23 03:55:18,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 498 transitions, 3504 flow [2022-11-23 03:55:18,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 498 transitions, 3471 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:55:18,350 INFO L231 Difference]: Finished difference. Result has 150 places, 153 transitions, 1263 flow [2022-11-23 03:55:18,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1263, PETRI_PLACES=150, PETRI_TRANSITIONS=153} [2022-11-23 03:55:18,351 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2022-11-23 03:55:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 153 transitions, 1263 flow [2022-11-23 03:55:18,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:18,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:55:18,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:55:18,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:55:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:18,553 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:55:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:55:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -642773121, now seen corresponding path program 1 times [2022-11-23 03:55:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:55:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247371045] [2022-11-23 03:55:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:55:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:18,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:55:18,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:55:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-23 03:55:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:55:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:55:18,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:55:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:55:18,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:55:18,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:55:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247371045] [2022-11-23 03:55:18,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247371045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:55:18,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:55:18,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:55:18,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782978001] [2022-11-23 03:55:18,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:55:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:55:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:55:18,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:55:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:55:19,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 538 [2022-11-23 03:55:19,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 153 transitions, 1263 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:19,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:55:19,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 538 [2022-11-23 03:55:19,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:55:23,747 INFO L130 PetriNetUnfolder]: 12326/20992 cut-off events. [2022-11-23 03:55:23,747 INFO L131 PetriNetUnfolder]: For 81786/81786 co-relation queries the response was YES. [2022-11-23 03:55:23,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75228 conditions, 20992 events. 12326/20992 cut-off events. For 81786/81786 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 164461 event pairs, 5054 based on Foata normal form. 0/19662 useless extension candidates. Maximal degree in co-relation 75178. Up to 11672 conditions per place. [2022-11-23 03:55:23,984 INFO L137 encePairwiseOnDemand]: 531/538 looper letters, 202 selfloop transitions, 45 changer transitions 0/247 dead transitions. [2022-11-23 03:55:23,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 247 transitions, 2481 flow [2022-11-23 03:55:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:55:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:55:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1171 transitions. [2022-11-23 03:55:23,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43531598513011155 [2022-11-23 03:55:23,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1171 transitions. [2022-11-23 03:55:23,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1171 transitions. [2022-11-23 03:55:23,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:55:23,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1171 transitions. [2022-11-23 03:55:23,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.2) internal successors, (1171), 5 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:23,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:23,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 538.0) internal successors, (3228), 6 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:23,991 INFO L175 Difference]: Start difference. First operand has 150 places, 153 transitions, 1263 flow. Second operand 5 states and 1171 transitions. [2022-11-23 03:55:23,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 247 transitions, 2481 flow [2022-11-23 03:55:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 247 transitions, 2291 flow, removed 76 selfloop flow, removed 6 redundant places. [2022-11-23 03:55:24,330 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1503 flow [2022-11-23 03:55:24,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1503, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2022-11-23 03:55:24,331 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2022-11-23 03:55:24,331 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1503 flow [2022-11-23 03:55:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:24,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:55:24,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:55:24,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:55:24,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:24,532 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:55:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:55:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash -642768425, now seen corresponding path program 1 times [2022-11-23 03:55:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:55:24,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447487446] [2022-11-23 03:55:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:55:24,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:55:24,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:55:24,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 03:55:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:55:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:55:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:55:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:55:24,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:55:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:55:24,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:55:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447487446] [2022-11-23 03:55:24,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447487446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:55:24,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:55:24,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 03:55:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108184651] [2022-11-23 03:55:24,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:55:24,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:55:24,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:55:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:55:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:55:26,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 538 [2022-11-23 03:55:26,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1503 flow. Second operand has 12 states, 12 states have (on average 220.66666666666666) internal successors, (2648), 12 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:26,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:55:26,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 538 [2022-11-23 03:55:26,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:55:31,151 INFO L130 PetriNetUnfolder]: 11052/19046 cut-off events. [2022-11-23 03:55:31,151 INFO L131 PetriNetUnfolder]: For 83360/83360 co-relation queries the response was YES. [2022-11-23 03:55:31,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72488 conditions, 19046 events. 11052/19046 cut-off events. For 83360/83360 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 149253 event pairs, 6654 based on Foata normal form. 336/19382 useless extension candidates. Maximal degree in co-relation 72435. Up to 13826 conditions per place. [2022-11-23 03:55:31,322 INFO L137 encePairwiseOnDemand]: 527/538 looper letters, 239 selfloop transitions, 28 changer transitions 0/267 dead transitions. [2022-11-23 03:55:31,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 267 transitions, 2556 flow [2022-11-23 03:55:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:55:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:55:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2527 transitions. [2022-11-23 03:55:31,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4270023656640757 [2022-11-23 03:55:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2527 transitions. [2022-11-23 03:55:31,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2527 transitions. [2022-11-23 03:55:31,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:55:31,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2527 transitions. [2022-11-23 03:55:31,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.72727272727272) internal successors, (2527), 11 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:31,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 538.0) internal successors, (6456), 12 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:31,335 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 538.0) internal successors, (6456), 12 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:31,335 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1503 flow. Second operand 11 states and 2527 transitions. [2022-11-23 03:55:31,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 267 transitions, 2556 flow [2022-11-23 03:55:31,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 267 transitions, 2490 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:55:31,953 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1538 flow [2022-11-23 03:55:31,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1538, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2022-11-23 03:55:31,953 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 102 predicate places. [2022-11-23 03:55:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1538 flow [2022-11-23 03:55:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.66666666666666) internal successors, (2648), 12 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:31,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:55:31,954 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-23 03:55:31,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:55:32,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:32,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:55:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:55:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1198160745, now seen corresponding path program 1 times [2022-11-23 03:55:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:55:32,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124786539] [2022-11-23 03:55:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:55:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:55:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:55:32,156 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:55:32,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 03:55:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:55:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:55:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:55:32,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 03:55:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:55:32,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:55:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:55:34,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:55:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124786539] [2022-11-23 03:55:34,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124786539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:55:34,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:55:34,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-23 03:55:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207464867] [2022-11-23 03:55:34,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:55:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:55:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:55:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:55:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:55:53,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 538 [2022-11-23 03:55:53,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1538 flow. Second operand has 18 states, 18 states have (on average 219.05555555555554) internal successors, (3943), 18 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:55:53,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:55:53,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 538 [2022-11-23 03:55:53,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:55:58,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:00,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:02,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:03,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:05,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:07,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:09,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:56:27,648 INFO L130 PetriNetUnfolder]: 23441/40256 cut-off events. [2022-11-23 03:56:27,649 INFO L131 PetriNetUnfolder]: For 176788/176788 co-relation queries the response was YES. [2022-11-23 03:56:27,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153253 conditions, 40256 events. 23441/40256 cut-off events. For 176788/176788 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 331827 event pairs, 17304 based on Foata normal form. 37/40293 useless extension candidates. Maximal degree in co-relation 153198. Up to 8521 conditions per place. [2022-11-23 03:56:28,057 INFO L137 encePairwiseOnDemand]: 531/538 looper letters, 851 selfloop transitions, 51 changer transitions 0/902 dead transitions. [2022-11-23 03:56:28,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 902 transitions, 8876 flow [2022-11-23 03:56:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:56:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:56:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4384 transitions. [2022-11-23 03:56:28,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4527054935976869 [2022-11-23 03:56:28,063 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4384 transitions. [2022-11-23 03:56:28,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4384 transitions. [2022-11-23 03:56:28,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:28,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4384 transitions. [2022-11-23 03:56:28,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 243.55555555555554) internal successors, (4384), 18 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:28,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 538.0) internal successors, (10222), 19 states have internal predecessors, (10222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:28,076 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 538.0) internal successors, (10222), 19 states have internal predecessors, (10222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:28,076 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1538 flow. Second operand 18 states and 4384 transitions. [2022-11-23 03:56:28,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 902 transitions, 8876 flow [2022-11-23 03:56:31,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 902 transitions, 8808 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-23 03:56:31,164 INFO L231 Difference]: Finished difference. Result has 180 places, 186 transitions, 1879 flow [2022-11-23 03:56:31,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1879, PETRI_PLACES=180, PETRI_TRANSITIONS=186} [2022-11-23 03:56:31,165 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2022-11-23 03:56:31,165 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 186 transitions, 1879 flow [2022-11-23 03:56:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 219.05555555555554) internal successors, (3943), 18 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:31,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:31,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:31,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:56:31,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:56:31,371 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:56:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2143200448, now seen corresponding path program 1 times [2022-11-23 03:56:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:56:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332672041] [2022-11-23 03:56:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:31,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:56:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:56:31,373 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:56:31,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-23 03:56:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:56:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:56:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:56:31,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:56:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:56:31,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:56:31,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332672041] [2022-11-23 03:56:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332672041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:56:31,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:56:31,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 03:56:31,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810533988] [2022-11-23 03:56:31,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:56:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:56:31,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:56:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:56:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:56:33,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 538 [2022-11-23 03:56:33,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 186 transitions, 1879 flow. Second operand has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:33,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:33,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 538 [2022-11-23 03:56:33,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:42,872 INFO L130 PetriNetUnfolder]: 21701/38096 cut-off events. [2022-11-23 03:56:42,872 INFO L131 PetriNetUnfolder]: For 166201/166201 co-relation queries the response was YES. [2022-11-23 03:56:43,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141229 conditions, 38096 events. 21701/38096 cut-off events. For 166201/166201 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 321525 event pairs, 14248 based on Foata normal form. 1440/39536 useless extension candidates. Maximal degree in co-relation 141163. Up to 29364 conditions per place. [2022-11-23 03:56:43,362 INFO L137 encePairwiseOnDemand]: 528/538 looper letters, 265 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2022-11-23 03:56:43,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 295 transitions, 3105 flow [2022-11-23 03:56:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:56:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:56:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2523 transitions. [2022-11-23 03:56:43,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42632646164244675 [2022-11-23 03:56:43,368 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2523 transitions. [2022-11-23 03:56:43,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2523 transitions. [2022-11-23 03:56:43,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:43,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2523 transitions. [2022-11-23 03:56:43,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.36363636363637) internal successors, (2523), 11 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:43,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 538.0) internal successors, (6456), 12 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:43,382 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 538.0) internal successors, (6456), 12 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:43,382 INFO L175 Difference]: Start difference. First operand has 180 places, 186 transitions, 1879 flow. Second operand 11 states and 2523 transitions. [2022-11-23 03:56:43,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 295 transitions, 3105 flow [2022-11-23 03:56:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 295 transitions, 2971 flow, removed 28 selfloop flow, removed 7 redundant places. [2022-11-23 03:56:46,278 INFO L231 Difference]: Finished difference. Result has 184 places, 186 transitions, 1875 flow [2022-11-23 03:56:46,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1875, PETRI_PLACES=184, PETRI_TRANSITIONS=186} [2022-11-23 03:56:46,279 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2022-11-23 03:56:46,279 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 186 transitions, 1875 flow [2022-11-23 03:56:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:46,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:46,280 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:46,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:56:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:56:46,481 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 03:56:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 96906843, now seen corresponding path program 2 times [2022-11-23 03:56:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:56:46,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135317653] [2022-11-23 03:56:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:56:46,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:56:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:56:46,483 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:56:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65245ee-350a-4c0b-9def-4b7acb9e3dfa/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 03:56:46,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:56:46,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:56:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 03:56:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:56:46,656 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:56:46,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:56:46,724 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:56:46,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:56:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:56:46,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 03:56:46,839 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:56:46,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:56:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:56:46,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:56:46,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:56:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135317653] [2022-11-23 03:56:46,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135317653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:46,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:46,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:56:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221385765] [2022-11-23 03:56:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:56:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:56:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:56:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:56:47,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 538 [2022-11-23 03:56:47,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 186 transitions, 1875 flow. Second operand has 5 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:47,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:47,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 538 [2022-11-23 03:56:47,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand