./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.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_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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_ca6d43ad-af68-4d76-8705-44a57455d553/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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- 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 01:47:37,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:47:37,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:47:37,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:47:37,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:47:37,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:47:37,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:47:37,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:47:37,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:47:37,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:47:37,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:47:37,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:47:37,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:47:37,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:47:37,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:47:37,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:47:37,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:47:37,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:47:37,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:47:37,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:47:37,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:47:37,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:47:37,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:47:37,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:47:37,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:47:37,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:47:37,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:47:37,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:47:37,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:47:37,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:47:37,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:47:37,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:47:37,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:47:37,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:47:37,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:47:37,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:47:37,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:47:37,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:47:37,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:47:37,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:47:37,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:47:37,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 01:47:37,352 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:47:37,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:47:37,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:47:37,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:47:37,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:47:37,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:47:37,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:47:37,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:47:37,356 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:47:37,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:47:37,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:47:37,358 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 01:47:37,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:47:37,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:47:37,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:47:37,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 01:47:37,359 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 01:47:37,359 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 01:47:37,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:47:37,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 01:47:37,360 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:47:37,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:47:37,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:47:37,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:47:37,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:47:37,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:47:37,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:47:37,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:47:37,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:47:37,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:47:37,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:47:37,363 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:47:37,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:47:37,363 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_ca6d43ad-af68-4d76-8705-44a57455d553/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-23 01:47:37,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:47:37,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:47:37,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:47:37,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:47:37,676 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:47:37,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-23 01:47:40,728 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:47:40,904 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:47:40,905 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-23 01:47:40,912 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/9086caa58/aefeb640f44447f6af3367df744503e8/FLAG202fda46f [2022-11-23 01:47:40,927 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/9086caa58/aefeb640f44447f6af3367df744503e8 [2022-11-23 01:47:40,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:47:40,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:47:40,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:47:40,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:47:40,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:47:40,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:40" (1/1) ... [2022-11-23 01:47:40,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b575422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:40, skipping insertion in model container [2022-11-23 01:47:40,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:40" (1/1) ... [2022-11-23 01:47:40,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:47:40,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:47:41,189 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_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-23 01:47:41,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:47:41,224 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 01:47:41,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b95300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:41, skipping insertion in model container [2022-11-23 01:47:41,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:47:41,225 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 01:47:41,229 INFO L158 Benchmark]: Toolchain (without parser) took 295.63ms. Allocated memory is still 176.2MB. Free memory was 129.6MB in the beginning and 119.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 01:47:41,229 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 01:47:41,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.27ms. Allocated memory is still 176.2MB. Free memory was 129.6MB in the beginning and 119.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 01:47:41,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.27ms. Allocated memory is still 176.2MB. Free memory was 129.6MB in the beginning and 119.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 136]: 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_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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_ca6d43ad-af68-4d76-8705-44a57455d553/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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- 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 01:47:43,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:47:43,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:47:43,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:47:43,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:47:43,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:47:43,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:47:43,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:47:43,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:47:43,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:47:43,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:47:43,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:47:43,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:47:43,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:47:43,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:47:43,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:47:43,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:47:43,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:47:43,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:47:43,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:47:43,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:47:43,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:47:43,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:47:43,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:47:43,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:47:43,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:47:43,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:47:43,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:47:43,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:47:43,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:47:43,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:47:43,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:47:43,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:47:43,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:47:43,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:47:43,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:47:43,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:47:43,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:47:43,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:47:43,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:47:43,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:47:43,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 01:47:43,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:47:43,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:47:43,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:47:43,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:47:43,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:47:43,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:47:43,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:47:43,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:47:43,560 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:47:43,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:47:43,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:47:43,561 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 01:47:43,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:47:43,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:47:43,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:47:43,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 01:47:43,562 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 01:47:43,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 01:47:43,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:47:43,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 01:47:43,563 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 01:47:43,563 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 01:47:43,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:47:43,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:47:43,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:47:43,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:47:43,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:47:43,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:47:43,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:47:43,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:47:43,566 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 01:47:43,566 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 01:47:43,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:47:43,566 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:47:43,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:47:43,567 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 01:47:43,567 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_ca6d43ad-af68-4d76-8705-44a57455d553/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-23 01:47:44,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:47:44,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:47:44,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:47:44,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:47:44,034 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:47:44,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-23 01:47:47,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:47:47,337 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:47:47,337 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-23 01:47:47,344 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/2f429196f/87b1160711cc44e6a9e44e095458fca9/FLAG4171f777e [2022-11-23 01:47:47,358 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/data/2f429196f/87b1160711cc44e6a9e44e095458fca9 [2022-11-23 01:47:47,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:47:47,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:47:47,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:47:47,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:47:47,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:47:47,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75db7590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47, skipping insertion in model container [2022-11-23 01:47:47,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:47:47,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:47:47,642 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_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-23 01:47:47,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:47:47,682 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 01:47:47,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:47:47,717 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_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-23 01:47:47,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:47:47,737 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:47:47,778 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_ca6d43ad-af68-4d76-8705-44a57455d553/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-23 01:47:47,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:47:47,809 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:47:47,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47 WrapperNode [2022-11-23 01:47:47,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:47:47,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:47:47,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:47:47,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:47:47,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,889 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 238 [2022-11-23 01:47:47,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:47:47,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:47:47,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:47:47,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:47:47,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,952 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:47:47,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:47:47,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:47:47,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:47:47,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (1/1) ... [2022-11-23 01:47:47,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:47:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:47:47,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:47:48,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:47:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:47:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 01:47:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:47:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 01:47:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 01:47:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 01:47:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 01:47:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 01:47:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 01:47:48,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 01:47:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 01:47:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 01:47:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 01:47:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:47:48,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:47:48,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:47:48,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 01:47:48,050 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 01:47:48,195 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:47:48,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:47:48,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:47:49,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:47:49,153 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 01:47:49,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:49 BoogieIcfgContainer [2022-11-23 01:47:49,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:47:49,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:47:49,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:47:49,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:47:49,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:47:47" (1/3) ... [2022-11-23 01:47:49,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2e3bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:49, skipping insertion in model container [2022-11-23 01:47:49,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:47" (2/3) ... [2022-11-23 01:47:49,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2e3bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:49, skipping insertion in model container [2022-11-23 01:47:49,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:49" (3/3) ... [2022-11-23 01:47:49,171 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-11-23 01:47:49,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:47:49,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-23 01:47:49,190 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:47:49,321 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 01:47:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 492 flow [2022-11-23 01:47:49,498 INFO L130 PetriNetUnfolder]: 18/231 cut-off events. [2022-11-23 01:47:49,498 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 01:47:49,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 18/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-11-23 01:47:49,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 234 transitions, 492 flow [2022-11-23 01:47:49,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 226 transitions, 470 flow [2022-11-23 01:47:49,521 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:47:49,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 226 transitions, 470 flow [2022-11-23 01:47:49,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 226 transitions, 470 flow [2022-11-23 01:47:49,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 226 transitions, 470 flow [2022-11-23 01:47:49,633 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2022-11-23 01:47:49,634 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 01:47:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-11-23 01:47:49,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2022-11-23 01:48:31,107 INFO L134 LiptonReduction]: Checked pairs total: 4103 [2022-11-23 01:48:31,108 INFO L136 LiptonReduction]: Total number of compositions: 248 [2022-11-23 01:48:31,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:48:31,130 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;@47245bf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:48:31,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-23 01:48:31,133 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 01:48:31,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:48:31,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:31,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 01:48:31,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash 34383, now seen corresponding path program 1 times [2022-11-23 01:48:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:31,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143518140] [2022-11-23 01:48:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:31,154 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 01:48:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:31,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 01:48:31,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:31,714 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 01:48:31,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 01:48:31,759 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 01:48:31,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:31,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:31,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143518140] [2022-11-23 01:48:31,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143518140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:31,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:31,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:48:31,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527426695] [2022-11-23 01:48:31,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:48:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:31,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:48:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:48:32,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 482 [2022-11-23 01:48:32,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 01:48:32,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:32,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 482 [2022-11-23 01:48:32,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:35,574 INFO L130 PetriNetUnfolder]: 11937/15061 cut-off events. [2022-11-23 01:48:35,574 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-11-23 01:48:35,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30375 conditions, 15061 events. 11937/15061 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 72592 event pairs, 6024 based on Foata normal form. 0/3785 useless extension candidates. Maximal degree in co-relation 13696. Up to 7483 conditions per place. [2022-11-23 01:48:35,711 INFO L137 encePairwiseOnDemand]: 474/482 looper letters, 93 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2022-11-23 01:48:35,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 100 transitions, 430 flow [2022-11-23 01:48:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-11-23 01:48:35,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4612724757952974 [2022-11-23 01:48:35,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-11-23 01:48:35,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-11-23 01:48:35,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:35,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-11-23 01:48:35,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:48:35,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:35,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:35,768 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 667 transitions. [2022-11-23 01:48:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 100 transitions, 430 flow [2022-11-23 01:48:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 100 transitions, 406 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 01:48:35,797 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 144 flow [2022-11-23 01:48:35,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2022-11-23 01:48:35,804 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2022-11-23 01:48:35,804 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 144 flow [2022-11-23 01:48:35,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 01:48:35,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:35,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 01:48:35,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:36,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 34382, now seen corresponding path program 1 times [2022-11-23 01:48:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:36,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910818663] [2022-11-23 01:48:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:36,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 01:48:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:36,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:36,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 01:48:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:36,240 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 01:48:36,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 01:48:36,262 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 01:48:36,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:36,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910818663] [2022-11-23 01:48:36,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910818663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:36,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:36,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:48:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507395061] [2022-11-23 01:48:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:36,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:48:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:48:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:48:36,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 482 [2022-11-23 01:48:36,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 01:48:36,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:36,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 482 [2022-11-23 01:48:36,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:39,214 INFO L130 PetriNetUnfolder]: 11937/15057 cut-off events. [2022-11-23 01:48:39,214 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 01:48:39,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30159 conditions, 15057 events. 11937/15057 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 73124 event pairs, 6024 based on Foata normal form. 2/3777 useless extension candidates. Maximal degree in co-relation 15068. Up to 14957 conditions per place. [2022-11-23 01:48:39,305 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2022-11-23 01:48:39,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 242 flow [2022-11-23 01:48:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2022-11-23 01:48:39,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42461964038727523 [2022-11-23 01:48:39,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2022-11-23 01:48:39,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2022-11-23 01:48:39,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:39,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2022-11-23 01:48:39,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 01:48:39,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:39,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:39,315 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 144 flow. Second operand 3 states and 614 transitions. [2022-11-23 01:48:39,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 242 flow [2022-11-23 01:48:39,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:48:39,319 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 134 flow [2022-11-23 01:48:39,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2022-11-23 01:48:39,321 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2022-11-23 01:48:39,321 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 134 flow [2022-11-23 01:48:39,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 01:48:39,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:39,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 01:48:39,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:39,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:39,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1071023, now seen corresponding path program 1 times [2022-11-23 01:48:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995089638] [2022-11-23 01:48:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 01:48:39,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:39,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:39,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:39,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 01:48:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:39,795 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 01:48:39,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 01:48:39,882 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 01:48:39,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:48:40,144 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 01:48:40,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995089638] [2022-11-23 01:48:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995089638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:48:40,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:48:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 01:48:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869379053] [2022-11-23 01:48:40,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:48:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 01:48:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 01:48:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:48:41,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 482 [2022-11-23 01:48:41,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 01:48:41,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:41,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 482 [2022-11-23 01:48:41,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:46,079 INFO L130 PetriNetUnfolder]: 17913/22596 cut-off events. [2022-11-23 01:48:46,079 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-23 01:48:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45257 conditions, 22596 events. 17913/22596 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 1745. Compared 114317 event pairs, 9036 based on Foata normal form. 0/5693 useless extension candidates. Maximal degree in co-relation 45249. Up to 7482 conditions per place. [2022-11-23 01:48:46,199 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 131 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2022-11-23 01:48:46,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 153 transitions, 662 flow [2022-11-23 01:48:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:48:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 01:48:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1224 transitions. [2022-11-23 01:48:46,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42323651452282157 [2022-11-23 01:48:46,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1224 transitions. [2022-11-23 01:48:46,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1224 transitions. [2022-11-23 01:48:46,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:46,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1224 transitions. [2022-11-23 01:48:46,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 01:48:46,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states 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 01:48:46,216 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states 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 01:48:46,216 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 134 flow. Second operand 6 states and 1224 transitions. [2022-11-23 01:48:46,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 153 transitions, 662 flow [2022-11-23 01:48:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 153 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:48:46,226 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 278 flow [2022-11-23 01:48:46,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2022-11-23 01:48:46,228 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2022-11-23 01:48:46,228 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 278 flow [2022-11-23 01:48:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 01:48:46,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:46,229 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 01:48:46,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:46,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1072380, now seen corresponding path program 1 times [2022-11-23 01:48:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747109761] [2022-11-23 01:48:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:46,443 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 01:48:46,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:46,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:46,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 01:48:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:46,672 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-23 01:48:46,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 01:48:46,803 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 01:48:46,803 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 01:48:46,816 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 01:48:46,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:46,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:46,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747109761] [2022-11-23 01:48:46,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747109761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:46,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:46,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:48:46,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315857798] [2022-11-23 01:48:46,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:46,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:48:46,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:48:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:48:47,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 482 [2022-11-23 01:48:47,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 01:48:47,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:47,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 482 [2022-11-23 01:48:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:49,123 INFO L130 PetriNetUnfolder]: 13993/17833 cut-off events. [2022-11-23 01:48:49,124 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 01:48:49,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35786 conditions, 17833 events. 13993/17833 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 90670 event pairs, 7035 based on Foata normal form. 0/4780 useless extension candidates. Maximal degree in co-relation 35773. Up to 17683 conditions per place. [2022-11-23 01:48:49,276 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2022-11-23 01:48:49,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 382 flow [2022-11-23 01:48:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2022-11-23 01:48:49,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42946058091286304 [2022-11-23 01:48:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2022-11-23 01:48:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2022-11-23 01:48:49,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:49,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2022-11-23 01:48:49,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states 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 01:48:49,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:49,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:49,288 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 278 flow. Second operand 3 states and 621 transitions. [2022-11-23 01:48:49,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 382 flow [2022-11-23 01:48:49,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 363 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 01:48:49,291 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 241 flow [2022-11-23 01:48:49,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2022-11-23 01:48:49,292 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2022-11-23 01:48:49,293 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 241 flow [2022-11-23 01:48:49,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 01:48:49,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:49,294 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 01:48:49,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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)] Forceful destruction successful, exit code 0 [2022-11-23 01:48:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:49,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1072381, now seen corresponding path program 1 times [2022-11-23 01:48:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371716354] [2022-11-23 01:48:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:49,507 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 01:48:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:49,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:49,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 01:48:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:49,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:49,739 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-23 01:48:49,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-23 01:48:49,774 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 01:48:49,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 01:48:49,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:49,834 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 01:48:49,866 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 01:48:49,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:49,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:49,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371716354] [2022-11-23 01:48:49,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371716354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:49,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:49,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:48:49,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538907546] [2022-11-23 01:48:49,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:48:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:49,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:48:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:48:50,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 482 [2022-11-23 01:48:50,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 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 01:48:50,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:50,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 482 [2022-11-23 01:48:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:51,731 INFO L130 PetriNetUnfolder]: 10073/13070 cut-off events. [2022-11-23 01:48:51,732 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 01:48:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26241 conditions, 13070 events. 10073/13070 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 66920 event pairs, 5034 based on Foata normal form. 0/3889 useless extension candidates. Maximal degree in co-relation 26227. Up to 12920 conditions per place. [2022-11-23 01:48:51,813 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2022-11-23 01:48:51,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 337 flow [2022-11-23 01:48:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-11-23 01:48:51,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43015214384508993 [2022-11-23 01:48:51,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-11-23 01:48:51,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-11-23 01:48:51,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:51,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-11-23 01:48:51,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 01:48:51,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:51,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:51,823 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 241 flow. Second operand 3 states and 622 transitions. [2022-11-23 01:48:51,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 337 flow [2022-11-23 01:48:51,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:48:51,825 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2022-11-23 01:48:51,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2022-11-23 01:48:51,826 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2022-11-23 01:48:51,827 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2022-11-23 01:48:51,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 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 01:48:51,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:51,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 01:48:51,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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)] Ended with exit code 0 [2022-11-23 01:48:52,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:52,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1030584898, now seen corresponding path program 1 times [2022-11-23 01:48:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:52,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966005489] [2022-11-23 01:48:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:52,042 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 01:48:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:52,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:52,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:52,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 01:48:52,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:52,272 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-23 01:48:52,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-23 01:48:52,488 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 01:48:52,489 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 01:48:52,563 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 01:48:52,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:52,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966005489] [2022-11-23 01:48:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966005489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:52,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:48:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481251240] [2022-11-23 01:48:52,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:48:52,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:48:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:48:52,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 482 [2022-11-23 01:48:52,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:48:52,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:52,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 482 [2022-11-23 01:48:52,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:54,344 INFO L130 PetriNetUnfolder]: 9668/12524 cut-off events. [2022-11-23 01:48:54,344 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 01:48:54,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25150 conditions, 12524 events. 9668/12524 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 63540 event pairs, 4818 based on Foata normal form. 0/3790 useless extension candidates. Maximal degree in co-relation 25135. Up to 12374 conditions per place. [2022-11-23 01:48:54,424 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-11-23 01:48:54,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2022-11-23 01:48:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-11-23 01:48:54,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4266943291839557 [2022-11-23 01:48:54,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-11-23 01:48:54,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-11-23 01:48:54,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:54,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-11-23 01:48:54,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 01:48:54,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:54,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:54,436 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 617 transitions. [2022-11-23 01:48:54,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2022-11-23 01:48:54,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:48:54,439 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2022-11-23 01:48:54,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2022-11-23 01:48:54,440 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2022-11-23 01:48:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2022-11-23 01:48:54,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:48:54,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:54,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 01:48:54,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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)] Ended with exit code 0 [2022-11-23 01:48:54,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:54,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1030584900, now seen corresponding path program 1 times [2022-11-23 01:48:54,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787507866] [2022-11-23 01:48:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:48:54,655 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 01:48:54,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:54,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:54,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:48:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 01:48:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:54,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:54,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:54,912 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 01:48:54,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-23 01:48:54,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 01:48:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:48:55,008 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 01:48:55,074 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 01:48:55,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:48:55,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787507866] [2022-11-23 01:48:55,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787507866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:48:55,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:48:55,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:48:55,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034319536] [2022-11-23 01:48:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:48:55,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:48:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:48:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:48:55,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 482 [2022-11-23 01:48:55,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 01:48:55,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:48:55,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 482 [2022-11-23 01:48:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:48:56,885 INFO L130 PetriNetUnfolder]: 9263/11978 cut-off events. [2022-11-23 01:48:56,886 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 01:48:56,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24059 conditions, 11978 events. 9263/11978 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 60462 event pairs, 4602 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 24043. Up to 11828 conditions per place. [2022-11-23 01:48:56,961 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-11-23 01:48:56,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2022-11-23 01:48:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:48:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:48:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2022-11-23 01:48:56,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42738589211618255 [2022-11-23 01:48:56,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2022-11-23 01:48:56,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2022-11-23 01:48:56,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:48:56,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2022-11-23 01:48:56,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 01:48:56,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:56,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 01:48:56,973 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 618 transitions. [2022-11-23 01:48:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2022-11-23 01:48:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:48:56,976 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2022-11-23 01:48:56,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2022-11-23 01:48:56,977 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2022-11-23 01:48:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2022-11-23 01:48:56,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 01:48:56,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:48:56,978 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 01:48:56,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:57,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:57,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:48:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:48:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1847189071, now seen corresponding path program 2 times [2022-11-23 01:48:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:48:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282067714] [2022-11-23 01:48:57,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:48:57,201 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 01:48:57,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:48:57,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:57,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:48:57,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:48:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:48:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 01:48:57,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:48:57,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 01:48:57,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 01:48:57,652 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 01:48:57,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:48:58,445 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 01:48:58,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:48:58,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282067714] [2022-11-23 01:48:58,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282067714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:48:58,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:48:58,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 01:48:58,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970167063] [2022-11-23 01:48:58,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:48:58,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 01:48:58,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:48:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 01:48:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 01:49:03,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 482 [2022-11-23 01:49:03,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states 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 01:49:03,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:03,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 482 [2022-11-23 01:49:03,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:07,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:08,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:09,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:11,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:13,704 WARN L539 Checker$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 01:49:16,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:18,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 01:49:27,263 INFO L130 PetriNetUnfolder]: 30863/39898 cut-off events. [2022-11-23 01:49:27,263 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-11-23 01:49:27,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80050 conditions, 39898 events. 30863/39898 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 222155 event pairs, 15340 based on Foata normal form. 11/12408 useless extension candidates. Maximal degree in co-relation 80033. Up to 3948 conditions per place. [2022-11-23 01:49:27,481 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 345 selfloop transitions, 33 changer transitions 0/381 dead transitions. [2022-11-23 01:49:27,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 381 transitions, 1786 flow [2022-11-23 01:49:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 01:49:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 01:49:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2909 transitions. [2022-11-23 01:49:27,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43109069353882634 [2022-11-23 01:49:27,492 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2909 transitions. [2022-11-23 01:49:27,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2909 transitions. [2022-11-23 01:49:27,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:27,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2909 transitions. [2022-11-23 01:49:27,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 207.78571428571428) internal successors, (2909), 14 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states 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 01:49:27,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 482.0) internal successors, (7230), 15 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states 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 01:49:27,515 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 482.0) internal successors, (7230), 15 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states 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 01:49:27,515 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 14 states and 2909 transitions. [2022-11-23 01:49:27,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 381 transitions, 1786 flow [2022-11-23 01:49:27,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 381 transitions, 1785 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:49:27,522 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 469 flow [2022-11-23 01:49:27,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=469, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2022-11-23 01:49:27,523 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2022-11-23 01:49:27,523 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 469 flow [2022-11-23 01:49:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states 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 01:49:27,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:27,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:49:27,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:27,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:27,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:49:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:27,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1883354204, now seen corresponding path program 1 times [2022-11-23 01:49:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:49:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726237122] [2022-11-23 01:49:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:27,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 01:49:27,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:49:27,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:27,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 01:49:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:27,903 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 01:49:27,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:49:27,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:49:27,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726237122] [2022-11-23 01:49:27,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726237122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:27,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:27,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:49:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739296416] [2022-11-23 01:49:27,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:49:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:49:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:49:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:49:28,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 482 [2022-11-23 01:49:28,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 01:49:28,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:28,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 482 [2022-11-23 01:49:28,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:32,845 INFO L130 PetriNetUnfolder]: 30944/40182 cut-off events. [2022-11-23 01:49:32,846 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-11-23 01:49:33,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80802 conditions, 40182 events. 30944/40182 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 226995 event pairs, 15370 based on Foata normal form. 280/12871 useless extension candidates. Maximal degree in co-relation 80775. Up to 39397 conditions per place. [2022-11-23 01:49:33,132 INFO L137 encePairwiseOnDemand]: 468/482 looper letters, 99 selfloop transitions, 3 changer transitions 1/106 dead transitions. [2022-11-23 01:49:33,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 865 flow [2022-11-23 01:49:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:49:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:49:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 824 transitions. [2022-11-23 01:49:33,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42738589211618255 [2022-11-23 01:49:33,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 824 transitions. [2022-11-23 01:49:33,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 824 transitions. [2022-11-23 01:49:33,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:33,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 824 transitions. [2022-11-23 01:49:33,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 01:49:33,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:33,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:33,145 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 469 flow. Second operand 4 states and 824 transitions. [2022-11-23 01:49:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 865 flow [2022-11-23 01:49:33,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 776 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-11-23 01:49:33,151 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 434 flow [2022-11-23 01:49:33,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2022-11-23 01:49:33,152 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2022-11-23 01:49:33,153 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 434 flow [2022-11-23 01:49:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 01:49:33,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:33,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:33,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:33,366 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:49:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1464456636, now seen corresponding path program 1 times [2022-11-23 01:49:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:49:33,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534500925] [2022-11-23 01:49:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:33,367 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 01:49:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:49:33,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:33,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:49:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 01:49:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:33,639 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 01:49:33,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 01:49:33,779 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 01:49:33,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 01:49:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:49:33,924 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 01:49:33,951 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 01:49:33,951 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 01:49:34,015 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 01:49:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:39,060 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 01:49:39,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:49:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534500925] [2022-11-23 01:49:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534500925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:39,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:49:39,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-23 01:49:39,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245214922] [2022-11-23 01:49:39,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:39,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 01:49:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:49:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 01:49:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 01:49:41,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 01:49:47,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 01:49:54,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 01:49:55,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 01:49:55,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 482 [2022-11-23 01:49:55,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states 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 01:49:55,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:55,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 482 [2022-11-23 01:49:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:50:07,375 WARN L233 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:50:17,852 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:50:20,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 01:50:41,498 INFO L130 PetriNetUnfolder]: 69306/90430 cut-off events. [2022-11-23 01:50:41,498 INFO L131 PetriNetUnfolder]: For 9984/9984 co-relation queries the response was YES. [2022-11-23 01:50:41,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231434 conditions, 90430 events. 69306/90430 cut-off events. For 9984/9984 co-relation queries the response was YES. Maximal size of possible extension queue 3683. Compared 563178 event pairs, 34630 based on Foata normal form. 0/30660 useless extension candidates. Maximal degree in co-relation 231405. Up to 49841 conditions per place. [2022-11-23 01:50:42,126 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 181 selfloop transitions, 34 changer transitions 1/219 dead transitions. [2022-11-23 01:50:42,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 219 transitions, 1451 flow [2022-11-23 01:50:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 01:50:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 01:50:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2708 transitions. [2022-11-23 01:50:42,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37455048409405256 [2022-11-23 01:50:42,136 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2708 transitions. [2022-11-23 01:50:42,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2708 transitions. [2022-11-23 01:50:42,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:50:42,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2708 transitions. [2022-11-23 01:50:42,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.53333333333333) internal successors, (2708), 15 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states 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 01:50:42,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states 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 01:50:42,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states 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 01:50:42,159 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 434 flow. Second operand 15 states and 2708 transitions. [2022-11-23 01:50:42,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 219 transitions, 1451 flow [2022-11-23 01:50:42,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 219 transitions, 1445 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 01:50:42,170 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 714 flow [2022-11-23 01:50:42,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=714, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2022-11-23 01:50:42,172 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2022-11-23 01:50:42,175 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 714 flow [2022-11-23 01:50:42,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states 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 01:50:42,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:50:42,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:50:42,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:42,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:50:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:50:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1464456635, now seen corresponding path program 1 times [2022-11-23 01:50:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:50:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788816613] [2022-11-23 01:50:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:50:42,400 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 01:50:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:50:42,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:42,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:50:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:50:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:50:42,636 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 01:50:42,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 01:50:42,676 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 01:50:42,677 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 01:50:42,710 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 01:50:42,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:50:42,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:50:42,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788816613] [2022-11-23 01:50:42,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788816613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:50:42,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:50:42,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:50:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506681587] [2022-11-23 01:50:42,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:50:42,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:50:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:50:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:50:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:50:42,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 482 [2022-11-23 01:50:43,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 714 flow. Second operand has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 01:50:43,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:50:43,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 482 [2022-11-23 01:50:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:50:52,193 INFO L130 PetriNetUnfolder]: 39256/52260 cut-off events. [2022-11-23 01:50:52,193 INFO L131 PetriNetUnfolder]: For 39162/39162 co-relation queries the response was YES. [2022-11-23 01:50:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147037 conditions, 52260 events. 39256/52260 cut-off events. For 39162/39162 co-relation queries the response was YES. Maximal size of possible extension queue 2290. Compared 324521 event pairs, 19830 based on Foata normal form. 0/24830 useless extension candidates. Maximal degree in co-relation 147001. Up to 51617 conditions per place. [2022-11-23 01:50:52,594 INFO L137 encePairwiseOnDemand]: 477/482 looper letters, 79 selfloop transitions, 12 changer transitions 0/94 dead transitions. [2022-11-23 01:50:52,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 884 flow [2022-11-23 01:50:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:50:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:50:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2022-11-23 01:50:52,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4066390041493776 [2022-11-23 01:50:52,599 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2022-11-23 01:50:52,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2022-11-23 01:50:52,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:50:52,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2022-11-23 01:50:52,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 01:50:52,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:50:52,605 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:50:52,605 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 714 flow. Second operand 4 states and 784 transitions. [2022-11-23 01:50:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 884 flow [2022-11-23 01:50:52,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 863 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-23 01:50:52,643 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 705 flow [2022-11-23 01:50:52,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=705, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-23 01:50:52,644 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 38 predicate places. [2022-11-23 01:50:52,644 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 705 flow [2022-11-23 01:50:52,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 01:50:52,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:50:52,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:50:52,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:52,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 01:50:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:50:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1745331692, now seen corresponding path program 1 times [2022-11-23 01:50:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 01:50:52,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080331594] [2022-11-23 01:50:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:50:52,846 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 01:50:52,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 01:50:52,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:52,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6d43ad-af68-4d76-8705-44a57455d553/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 01:50:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:50:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 01:50:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:50:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:50:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:50:53,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:50:53,121 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 01:50:53,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-23 01:50:53,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 01:50:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:50:53,190 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 01:50:53,311 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 01:50:53,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:50:53,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 01:50:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080331594] [2022-11-23 01:50:53,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080331594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:50:53,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:50:53,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:50:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277502620] [2022-11-23 01:50:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:50:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:50:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 01:50:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:50:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:50:53,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 482 [2022-11-23 01:50:53,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 705 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 01:50:53,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:50:53,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 482 [2022-11-23 01:50:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand