./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:02:16,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:02:16,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:02:16,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:02:16,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:02:16,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:02:16,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:02:16,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:02:16,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:02:16,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:02:16,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:02:16,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:02:16,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:02:16,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:02:16,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:02:16,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:02:16,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:02:16,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:02:16,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:02:16,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:02:16,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:02:16,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:02:16,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:02:16,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:02:16,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:02:16,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:02:16,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:02:16,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:02:16,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:02:16,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:02:16,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:02:16,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:02:16,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:02:16,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:02:16,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:02:16,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:02:16,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:02:16,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:02:16,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:02:16,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:02:16,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:02:16,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:02:16,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:02:16,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:02:16,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:02:16,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:02:16,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:02:16,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:02:16,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:02:16,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:02:16,561 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:02:16,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:02:16,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:02:16,561 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:02:16,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:02:16,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:02:16,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:02:16,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:02:16,562 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:02:16,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:02:16,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:02:16,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:02:16,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:02:16,564 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:02:16,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:02:16,565 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:02:16,565 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-12-13 20:02:16,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:02:16,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:02:16,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:02:16,771 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:02:16,772 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:02:16,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:02:19,278 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:02:19,457 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:02:19,458 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:02:19,464 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/889d468e9/48acfb01acd04d6a95473702e6761024/FLAG8253cbbc8 [2022-12-13 20:02:19,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/889d468e9/48acfb01acd04d6a95473702e6761024 [2022-12-13 20:02:19,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:02:19,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:02:19,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:19,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:02:19,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:02:19,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:19" (1/1) ... [2022-12-13 20:02:19,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7bc4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:19, skipping insertion in model container [2022-12-13 20:02:19,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:19" (1/1) ... [2022-12-13 20:02:19,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:02:19,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:02:20,016 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:02:20,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:20,033 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 20:02:20,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a12786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:20, skipping insertion in model container [2022-12-13 20:02:20,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:20,034 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 20:02:20,036 INFO L158 Benchmark]: Toolchain (without parser) took 175.29ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 80.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 20:02:20,036 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 66.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:02:20,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.19ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 80.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 20:02:20,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 66.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.19ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 80.0MB 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: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:02:21,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:02:21,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:02:21,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:02:21,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:02:21,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:02:21,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:02:21,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:02:21,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:02:21,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:02:21,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:02:21,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:02:21,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:02:21,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:02:21,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:02:21,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:02:21,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:02:21,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:02:21,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:02:21,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:02:21,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:02:21,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:02:21,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:02:21,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:02:21,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:02:21,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:02:21,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:02:21,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:02:21,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:02:21,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:02:21,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:02:21,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:02:21,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:02:21,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:02:21,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:02:21,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:02:21,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:02:21,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:02:21,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:02:21,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:02:21,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:02:21,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 20:02:21,390 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:02:21,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:02:21,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:02:21,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:02:21,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:02:21,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:02:21,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:02:21,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:02:21,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 20:02:21,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:02:21,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:02:21,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:02:21,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:02:21,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:02:21,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:02:21,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:02:21,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 20:02:21,395 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:02:21,395 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-12-13 20:02:21,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:02:21,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:02:21,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:02:21,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:02:21,650 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:02:21,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:02:24,249 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:02:24,425 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:02:24,425 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:02:24,432 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/5b38f32a8/da54791ae50b42148863da49ac374380/FLAG88d0b0cfc [2022-12-13 20:02:24,446 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/data/5b38f32a8/da54791ae50b42148863da49ac374380 [2022-12-13 20:02:24,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:02:24,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:02:24,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:24,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:02:24,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:02:24,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bb5dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24, skipping insertion in model container [2022-12-13 20:02:24,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:02:24,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:02:24,598 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:02:24,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:24,616 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 20:02:24,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:02:24,631 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:02:24,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:24,637 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:02:24,654 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_93a07fed-4d95-4bb0-87c1-a0c93c693955/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:02:24,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:24,668 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:02:24,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24 WrapperNode [2022-12-13 20:02:24,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:24,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:02:24,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:02:24,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:02:24,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,702 INFO L138 Inliner]: procedures = 26, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 181 [2022-12-13 20:02:24,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:02:24,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:02:24,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:02:24,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:02:24,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:02:24,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:02:24,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:02:24,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:02:24,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (1/1) ... [2022-12-13 20:02:24,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:02:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:02:24,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:02:24,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:02:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:02:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 20:02:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:02:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 20:02:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:02:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:02:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:02:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:02:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:02:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:02:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:02:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:02:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 20:02:24,810 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:02:24,899 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:02:24,900 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:02:25,356 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:02:25,363 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:02:25,363 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:02:25,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:02:25 BoogieIcfgContainer [2022-12-13 20:02:25,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:02:25,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:02:25,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:02:25,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:02:25,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:02:24" (1/3) ... [2022-12-13 20:02:25,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a5b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:02:25, skipping insertion in model container [2022-12-13 20:02:25,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:24" (2/3) ... [2022-12-13 20:02:25,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a5b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:02:25, skipping insertion in model container [2022-12-13 20:02:25,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:02:25" (3/3) ... [2022-12-13 20:02:25,371 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2022-12-13 20:02:25,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:02:25,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 20:02:25,385 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:02:25,449 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 20:02:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 267 transitions, 550 flow [2022-12-13 20:02:25,567 INFO L130 PetriNetUnfolder]: 21/265 cut-off events. [2022-12-13 20:02:25,567 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:02:25,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 265 events. 21/265 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 559 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 20:02:25,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 267 transitions, 550 flow [2022-12-13 20:02:25,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 260 transitions, 532 flow [2022-12-13 20:02:25,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:02:25,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 260 transitions, 532 flow [2022-12-13 20:02:25,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 260 transitions, 532 flow [2022-12-13 20:02:25,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 260 transitions, 532 flow [2022-12-13 20:02:25,648 INFO L130 PetriNetUnfolder]: 21/260 cut-off events. [2022-12-13 20:02:25,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:02:25,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 260 events. 21/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 545 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 20:02:25,655 INFO L119 LiptonReduction]: Number of co-enabled transitions 8508 [2022-12-13 20:03:07,265 INFO L134 LiptonReduction]: Checked pairs total: 7885 [2022-12-13 20:03:07,266 INFO L136 LiptonReduction]: Total number of compositions: 305 [2022-12-13 20:03:07,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:03:07,280 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;@54c536b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:03:07,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-13 20:03:07,282 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 20:03:07,282 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:03:07,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:07,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:03:07,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 34866, now seen corresponding path program 1 times [2022-12-13 20:03:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109460471] [2022-12-13 20:03:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:07,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:07,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:07,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:07,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 20:03:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:03:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:07,518 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:07,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:07,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:07,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109460471] [2022-12-13 20:03:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109460471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:07,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:07,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452092895] [2022-12-13 20:03:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:07,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:07,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:07,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 572 [2022-12-13 20:03:07,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:07,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:07,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 572 [2022-12-13 20:03:07,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:08,764 INFO L130 PetriNetUnfolder]: 1912/2639 cut-off events. [2022-12-13 20:03:08,764 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 20:03:08,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5325 conditions, 2639 events. 1912/2639 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 13731 event pairs, 925 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 2325. Up to 1323 conditions per place. [2022-12-13 20:03:08,776 INFO L137 encePairwiseOnDemand]: 565/572 looper letters, 72 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-12-13 20:03:08,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 324 flow [2022-12-13 20:03:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 806 transitions. [2022-12-13 20:03:08,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2022-12-13 20:03:08,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 806 transitions. [2022-12-13 20:03:08,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 806 transitions. [2022-12-13 20:03:08,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:08,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 806 transitions. [2022-12-13 20:03:08,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:08,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:08,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:08,808 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 100 flow. Second operand 3 states and 806 transitions. [2022-12-13 20:03:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 324 flow [2022-12-13 20:03:08,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 20:03:08,814 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 96 flow [2022-12-13 20:03:08,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2022-12-13 20:03:08,819 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 20:03:08,820 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 96 flow [2022-12-13 20:03:08,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:08,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:08,820 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:03:08,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:03:09,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:09,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 35083, now seen corresponding path program 1 times [2022-12-13 20:03:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:09,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632297791] [2022-12-13 20:03:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:09,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:09,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:09,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 20:03:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:03:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:09,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:09,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632297791] [2022-12-13 20:03:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632297791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:09,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:09,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832356723] [2022-12-13 20:03:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:09,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 572 [2022-12-13 20:03:09,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:09,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:09,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 572 [2022-12-13 20:03:09,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:09,767 INFO L130 PetriNetUnfolder]: 966/1332 cut-off events. [2022-12-13 20:03:09,767 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:03:09,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1332 events. 966/1332 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 6305 event pairs, 464 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 2661. Up to 1326 conditions per place. [2022-12-13 20:03:09,773 INFO L137 encePairwiseOnDemand]: 567/572 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-13 20:03:09,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 178 flow [2022-12-13 20:03:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2022-12-13 20:03:09,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44988344988344986 [2022-12-13 20:03:09,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2022-12-13 20:03:09,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2022-12-13 20:03:09,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:09,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2022-12-13 20:03:09,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:09,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:09,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:09,784 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 96 flow. Second operand 3 states and 772 transitions. [2022-12-13 20:03:09,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 178 flow [2022-12-13 20:03:09,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:09,786 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 106 flow [2022-12-13 20:03:09,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 20:03:09,787 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-12-13 20:03:09,787 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 106 flow [2022-12-13 20:03:09,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:09,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:09,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:03:09,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 20:03:09,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:09,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 34865, now seen corresponding path program 1 times [2022-12-13 20:03:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912131560] [2022-12-13 20:03:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:09,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 20:03:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 20:03:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:10,064 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:03:10,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:03:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:10,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:10,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:10,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912131560] [2022-12-13 20:03:10,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912131560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:10,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:10,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425235498] [2022-12-13 20:03:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:10,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:10,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:10,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:10,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:10,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 572 [2022-12-13 20:03:10,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:10,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:10,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 572 [2022-12-13 20:03:10,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:10,612 INFO L130 PetriNetUnfolder]: 966/1330 cut-off events. [2022-12-13 20:03:10,612 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:03:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1330 events. 966/1330 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 6140 event pairs, 464 based on Foata normal form. 2/264 useless extension candidates. Maximal degree in co-relation 2662. Up to 1325 conditions per place. [2022-12-13 20:03:10,616 INFO L137 encePairwiseOnDemand]: 570/572 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 20:03:10,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 180 flow [2022-12-13 20:03:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2022-12-13 20:03:10,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44347319347319347 [2022-12-13 20:03:10,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2022-12-13 20:03:10,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2022-12-13 20:03:10,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:10,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2022-12-13 20:03:10,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 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) [2022-12-13 20:03:10,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:10,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:10,622 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 106 flow. Second operand 3 states and 761 transitions. [2022-12-13 20:03:10,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 180 flow [2022-12-13 20:03:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 174 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 20:03:10,623 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 100 flow [2022-12-13 20:03:10,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-12-13 20:03:10,624 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2022-12-13 20:03:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 100 flow [2022-12-13 20:03:10,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:10,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:10,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:03:10,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 20:03:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:10,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1088742, now seen corresponding path program 1 times [2022-12-13 20:03:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:10,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446642846] [2022-12-13 20:03:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:10,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:10,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:10,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 20:03:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:03:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:10,915 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-12-13 20:03:10,916 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 20:03:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:10,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:10,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446642846] [2022-12-13 20:03:10,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446642846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:10,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:10,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:10,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122149009] [2022-12-13 20:03:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:11,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 572 [2022-12-13 20:03:11,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:11,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 572 [2022-12-13 20:03:11,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:11,476 INFO L130 PetriNetUnfolder]: 728/1021 cut-off events. [2022-12-13 20:03:11,477 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:03:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 1021 events. 728/1021 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 4715 event pairs, 347 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 2046. Up to 1016 conditions per place. [2022-12-13 20:03:11,481 INFO L137 encePairwiseOnDemand]: 569/572 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 20:03:11,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 166 flow [2022-12-13 20:03:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2022-12-13 20:03:11,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376456876456876 [2022-12-13 20:03:11,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2022-12-13 20:03:11,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2022-12-13 20:03:11,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:11,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2022-12-13 20:03:11,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,487 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 100 flow. Second operand 3 states and 751 transitions. [2022-12-13 20:03:11,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 166 flow [2022-12-13 20:03:11,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:11,488 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 95 flow [2022-12-13 20:03:11,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-13 20:03:11,488 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 20:03:11,488 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 95 flow [2022-12-13 20:03:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:11,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:03:11,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 20:03:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:11,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1088744, now seen corresponding path program 1 times [2022-12-13 20:03:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:11,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050825187] [2022-12-13 20:03:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:11,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:11,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 20:03:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:03:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:03:11,806 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-12-13 20:03:11,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-12-13 20:03:11,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 20:03:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:11,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:11,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050825187] [2022-12-13 20:03:11,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050825187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:11,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:11,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872043575] [2022-12-13 20:03:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:12,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 572 [2022-12-13 20:03:12,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:12,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:12,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 572 [2022-12-13 20:03:12,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:12,428 INFO L130 PetriNetUnfolder]: 490/712 cut-off events. [2022-12-13 20:03:12,429 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:03:12,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 712 events. 490/712 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 3225 event pairs, 230 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 1427. Up to 707 conditions per place. [2022-12-13 20:03:12,431 INFO L137 encePairwiseOnDemand]: 569/572 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-12-13 20:03:12,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 157 flow [2022-12-13 20:03:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2022-12-13 20:03:12,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4417249417249417 [2022-12-13 20:03:12,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2022-12-13 20:03:12,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2022-12-13 20:03:12,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:12,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2022-12-13 20:03:12,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:12,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:12,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:12,436 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 95 flow. Second operand 3 states and 758 transitions. [2022-12-13 20:03:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 157 flow [2022-12-13 20:03:12,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:12,437 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 90 flow [2022-12-13 20:03:12,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2022-12-13 20:03:12,437 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2022-12-13 20:03:12,437 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 90 flow [2022-12-13 20:03:12,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:12,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:12,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:03:12,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 20:03:12,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:12,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1088525, now seen corresponding path program 1 times [2022-12-13 20:03:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722718914] [2022-12-13 20:03:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:12,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:12,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:12,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:12,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 20:03:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:03:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:12,757 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:12,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:13,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722718914] [2022-12-13 20:03:13,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722718914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:13,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:13,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 20:03:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327235094] [2022-12-13 20:03:13,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:03:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:03:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:03:14,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 572 [2022-12-13 20:03:14,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:14,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:14,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 572 [2022-12-13 20:03:14,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:15,126 INFO L130 PetriNetUnfolder]: 964/1408 cut-off events. [2022-12-13 20:03:15,126 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:03:15,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 1408 events. 964/1408 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 7246 event pairs, 459 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 2825. Up to 704 conditions per place. [2022-12-13 20:03:15,130 INFO L137 encePairwiseOnDemand]: 568/572 looper letters, 62 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2022-12-13 20:03:15,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 314 flow [2022-12-13 20:03:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:03:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:03:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1488 transitions. [2022-12-13 20:03:15,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2022-12-13 20:03:15,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1488 transitions. [2022-12-13 20:03:15,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1488 transitions. [2022-12-13 20:03:15,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:15,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1488 transitions. [2022-12-13 20:03:15,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:15,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 572.0) internal successors, (4004), 7 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:15,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 572.0) internal successors, (4004), 7 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:15,140 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 90 flow. Second operand 6 states and 1488 transitions. [2022-12-13 20:03:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 314 flow [2022-12-13 20:03:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:15,141 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 147 flow [2022-12-13 20:03:15,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2022-12-13 20:03:15,141 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2022-12-13 20:03:15,141 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 147 flow [2022-12-13 20:03:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:15,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:15,142 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:03:15,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 20:03:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:15,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1046306755, now seen corresponding path program 1 times [2022-12-13 20:03:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551973741] [2022-12-13 20:03:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:15,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:15,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:15,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 20:03:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:03:15,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:15,471 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:15,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:15,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:15,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551973741] [2022-12-13 20:03:15,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551973741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:15,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:15,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 20:03:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149615545] [2022-12-13 20:03:15,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:03:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:03:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:03:18,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:03:19,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 572 [2022-12-13 20:03:19,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 233.25) internal successors, (1866), 8 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:19,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:19,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 572 [2022-12-13 20:03:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:19,994 INFO L130 PetriNetUnfolder]: 898/1304 cut-off events. [2022-12-13 20:03:19,994 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 20:03:19,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1304 events. 898/1304 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 6629 event pairs, 427 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 2636. Up to 652 conditions per place. [2022-12-13 20:03:19,998 INFO L137 encePairwiseOnDemand]: 568/572 looper letters, 62 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2022-12-13 20:03:19,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 339 flow [2022-12-13 20:03:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:03:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:03:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1225 transitions. [2022-12-13 20:03:20,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42832167832167833 [2022-12-13 20:03:20,000 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1225 transitions. [2022-12-13 20:03:20,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1225 transitions. [2022-12-13 20:03:20,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:20,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1225 transitions. [2022-12-13 20:03:20,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,004 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,004 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 147 flow. Second operand 5 states and 1225 transitions. [2022-12-13 20:03:20,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 339 flow [2022-12-13 20:03:20,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:20,006 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 135 flow [2022-12-13 20:03:20,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2022-12-13 20:03:20,006 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2022-12-13 20:03:20,006 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 135 flow [2022-12-13 20:03:20,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 233.25) internal successors, (1866), 8 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:20,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:03:20,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 20:03:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:20,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1046306756, now seen corresponding path program 1 times [2022-12-13 20:03:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:20,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176177186] [2022-12-13 20:03:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:20,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:20,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:20,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 20:03:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:03:20,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:20,307 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 20:03:20,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 20:03:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:20,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:20,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176177186] [2022-12-13 20:03:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176177186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:03:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748600137] [2022-12-13 20:03:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:03:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:03:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:03:20,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 572 [2022-12-13 20:03:20,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:20,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 572 [2022-12-13 20:03:20,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:20,821 INFO L130 PetriNetUnfolder]: 849/1217 cut-off events. [2022-12-13 20:03:20,821 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 20:03:20,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1217 events. 849/1217 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 6055 event pairs, 396 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2459. Up to 1207 conditions per place. [2022-12-13 20:03:20,825 INFO L137 encePairwiseOnDemand]: 569/572 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-12-13 20:03:20,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 201 flow [2022-12-13 20:03:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:03:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:03:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2022-12-13 20:03:20,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43414918414918413 [2022-12-13 20:03:20,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2022-12-13 20:03:20,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2022-12-13 20:03:20,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:20,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2022-12-13 20:03:20,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,830 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 135 flow. Second operand 3 states and 745 transitions. [2022-12-13 20:03:20,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 201 flow [2022-12-13 20:03:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 37 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 20:03:20,831 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 128 flow [2022-12-13 20:03:20,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2022-12-13 20:03:20,832 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2022-12-13 20:03:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 128 flow [2022-12-13 20:03:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:20,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:20,832 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 20:03:20,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 20:03:21,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:21,034 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1923864846, now seen corresponding path program 2 times [2022-12-13 20:03:21,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830077099] [2022-12-13 20:03:21,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:03:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:21,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:21,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 20:03:21,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:03:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:03:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:21,173 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:21,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:21,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:21,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830077099] [2022-12-13 20:03:21,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830077099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:21,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:21,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:03:21,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277320924] [2022-12-13 20:03:21,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:21,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:03:21,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:03:21,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:03:26,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 572 [2022-12-13 20:03:26,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 238.0) internal successors, (2856), 12 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:26,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:26,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 572 [2022-12-13 20:03:26,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:32,368 INFO L130 PetriNetUnfolder]: 3673/5314 cut-off events. [2022-12-13 20:03:32,368 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 20:03:32,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 5314 events. 3673/5314 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31135 event pairs, 1774 based on Foata normal form. 6/1709 useless extension candidates. Maximal degree in co-relation 10675. Up to 600 conditions per place. [2022-12-13 20:03:32,384 INFO L137 encePairwiseOnDemand]: 568/572 looper letters, 236 selfloop transitions, 12 changer transitions 0/250 dead transitions. [2022-12-13 20:03:32,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 250 transitions, 1136 flow [2022-12-13 20:03:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:03:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 20:03:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3098 transitions. [2022-12-13 20:03:32,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45134032634032634 [2022-12-13 20:03:32,389 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3098 transitions. [2022-12-13 20:03:32,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3098 transitions. [2022-12-13 20:03:32,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:32,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3098 transitions. [2022-12-13 20:03:32,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.1666666666667) internal successors, (3098), 12 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:32,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 572.0) internal successors, (7436), 13 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:32,399 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 572.0) internal successors, (7436), 13 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:32,399 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 128 flow. Second operand 12 states and 3098 transitions. [2022-12-13 20:03:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 250 transitions, 1136 flow [2022-12-13 20:03:32,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 250 transitions, 1135 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:03:32,402 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 225 flow [2022-12-13 20:03:32,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=225, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2022-12-13 20:03:32,402 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2022-12-13 20:03:32,403 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 225 flow [2022-12-13 20:03:32,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.0) internal successors, (2856), 12 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:32,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:32,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:03:32,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 20:03:32,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:32,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1924238338, now seen corresponding path program 1 times [2022-12-13 20:03:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712110126] [2022-12-13 20:03:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:32,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:32,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:32,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:32,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 20:03:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:03:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:32,778 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:03:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:03:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:32,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:32,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712110126] [2022-12-13 20:03:32,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712110126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:32,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:32,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:03:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909650753] [2022-12-13 20:03:32,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:32,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:03:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:32,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:03:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:03:33,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 572 [2022-12-13 20:03:33,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:33,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:33,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 572 [2022-12-13 20:03:33,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:33,827 INFO L130 PetriNetUnfolder]: 2162/3173 cut-off events. [2022-12-13 20:03:33,827 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 20:03:33,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 3173 events. 2162/3173 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17632 event pairs, 990 based on Foata normal form. 0/1157 useless extension candidates. Maximal degree in co-relation 6432. Up to 3124 conditions per place. [2022-12-13 20:03:33,835 INFO L137 encePairwiseOnDemand]: 565/572 looper letters, 32 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2022-12-13 20:03:33,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 39 transitions, 289 flow [2022-12-13 20:03:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:03:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:03:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 921 transitions. [2022-12-13 20:03:33,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40253496503496505 [2022-12-13 20:03:33,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 921 transitions. [2022-12-13 20:03:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 921 transitions. [2022-12-13 20:03:33,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:33,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 921 transitions. [2022-12-13 20:03:33,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.25) internal successors, (921), 4 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:33,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:33,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:33,841 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 225 flow. Second operand 4 states and 921 transitions. [2022-12-13 20:03:33,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 39 transitions, 289 flow [2022-12-13 20:03:33,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 39 transitions, 264 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 20:03:33,843 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 200 flow [2022-12-13 20:03:33,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2022-12-13 20:03:33,843 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 11 predicate places. [2022-12-13 20:03:33,843 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 200 flow [2022-12-13 20:03:33,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:33,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:33,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:03:33,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:03:34,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:34,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1924238339, now seen corresponding path program 1 times [2022-12-13 20:03:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385548211] [2022-12-13 20:03:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:34,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:34,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:34,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:34,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 20:03:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:03:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:34,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:34,315 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 35 treesize of output 31 [2022-12-13 20:03:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:34,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385548211] [2022-12-13 20:03:34,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385548211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:34,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:34,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 20:03:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685501632] [2022-12-13 20:03:34,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:03:34,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:03:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:03:35,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 572 [2022-12-13 20:03:35,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 234.25) internal successors, (1874), 8 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:35,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:35,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 572 [2022-12-13 20:03:35,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:37,415 INFO L130 PetriNetUnfolder]: 2639/4055 cut-off events. [2022-12-13 20:03:37,415 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 20:03:37,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8232 conditions, 4055 events. 2639/4055 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 25075 event pairs, 504 based on Foata normal form. 0/1595 useless extension candidates. Maximal degree in co-relation 8206. Up to 2602 conditions per place. [2022-12-13 20:03:37,425 INFO L137 encePairwiseOnDemand]: 567/572 looper letters, 65 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2022-12-13 20:03:37,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 441 flow [2022-12-13 20:03:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:03:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:03:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1697 transitions. [2022-12-13 20:03:37,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4238261738261738 [2022-12-13 20:03:37,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1697 transitions. [2022-12-13 20:03:37,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1697 transitions. [2022-12-13 20:03:37,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:37,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1697 transitions. [2022-12-13 20:03:37,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 242.42857142857142) internal successors, (1697), 7 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:37,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 572.0) internal successors, (4576), 8 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:37,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 572.0) internal successors, (4576), 8 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:37,433 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 200 flow. Second operand 7 states and 1697 transitions. [2022-12-13 20:03:37,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 441 flow [2022-12-13 20:03:37,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:03:37,435 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 240 flow [2022-12-13 20:03:37,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2022-12-13 20:03:37,435 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2022-12-13 20:03:37,435 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 240 flow [2022-12-13 20:03:37,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 234.25) internal successors, (1874), 8 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:37,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:37,436 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:37,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 20:03:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:37,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 478155264, now seen corresponding path program 1 times [2022-12-13 20:03:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:37,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308409322] [2022-12-13 20:03:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:37,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:37,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 20:03:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:03:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:37,769 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:37,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:37,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:38,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308409322] [2022-12-13 20:03:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308409322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:38,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:38,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 20:03:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169118806] [2022-12-13 20:03:38,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:38,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:03:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:03:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:03:41,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 572 [2022-12-13 20:03:41,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 233.5) internal successors, (1868), 8 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:41,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:41,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 572 [2022-12-13 20:03:41,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:45,990 INFO L130 PetriNetUnfolder]: 1807/2905 cut-off events. [2022-12-13 20:03:45,990 INFO L131 PetriNetUnfolder]: For 812/812 co-relation queries the response was YES. [2022-12-13 20:03:45,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 2905 events. 1807/2905 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 17704 event pairs, 1033 based on Foata normal form. 21/1707 useless extension candidates. Maximal degree in co-relation 6591. Up to 2539 conditions per place. [2022-12-13 20:03:45,998 INFO L137 encePairwiseOnDemand]: 560/572 looper letters, 54 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2022-12-13 20:03:45,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 435 flow [2022-12-13 20:03:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:03:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 20:03:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2159 transitions. [2022-12-13 20:03:46,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4193861693861694 [2022-12-13 20:03:46,003 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2159 transitions. [2022-12-13 20:03:46,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2159 transitions. [2022-12-13 20:03:46,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:46,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2159 transitions. [2022-12-13 20:03:46,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.88888888888889) internal successors, (2159), 9 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:46,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 572.0) internal successors, (5720), 10 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:46,009 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 572.0) internal successors, (5720), 10 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:46,009 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 240 flow. Second operand 9 states and 2159 transitions. [2022-12-13 20:03:46,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 435 flow [2022-12-13 20:03:46,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 419 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 20:03:46,011 INFO L231 Difference]: Finished difference. Result has 72 places, 42 transitions, 281 flow [2022-12-13 20:03:46,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=281, PETRI_PLACES=72, PETRI_TRANSITIONS=42} [2022-12-13 20:03:46,012 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2022-12-13 20:03:46,012 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 42 transitions, 281 flow [2022-12-13 20:03:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 233.5) internal successors, (1868), 8 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:46,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:46,013 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:46,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 20:03:46,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:46,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash -175529371, now seen corresponding path program 2 times [2022-12-13 20:03:46,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:46,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119999571] [2022-12-13 20:03:46,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:03:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:46,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:46,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 20:03:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:03:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:03:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:46,329 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:46,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 20:03:46,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:03:46,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:46,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119999571] [2022-12-13 20:03:46,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119999571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:03:46,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:03:46,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:03:46,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000059485] [2022-12-13 20:03:46,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:03:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:03:46,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:03:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:03:46,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 572 [2022-12-13 20:03:46,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 42 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:46,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:46,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 572 [2022-12-13 20:03:46,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:03:47,352 INFO L130 PetriNetUnfolder]: 533/995 cut-off events. [2022-12-13 20:03:47,352 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2022-12-13 20:03:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 995 events. 533/995 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5548 event pairs, 279 based on Foata normal form. 144/896 useless extension candidates. Maximal degree in co-relation 2277. Up to 946 conditions per place. [2022-12-13 20:03:47,354 INFO L137 encePairwiseOnDemand]: 562/572 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2022-12-13 20:03:47,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 293 flow [2022-12-13 20:03:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:03:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:03:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 976 transitions. [2022-12-13 20:03:47,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42657342657342656 [2022-12-13 20:03:47,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 976 transitions. [2022-12-13 20:03:47,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 976 transitions. [2022-12-13 20:03:47,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:03:47,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 976 transitions. [2022-12-13 20:03:47,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:47,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:47,359 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:47,360 INFO L175 Difference]: Start difference. First operand has 72 places, 42 transitions, 281 flow. Second operand 4 states and 976 transitions. [2022-12-13 20:03:47,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 293 flow [2022-12-13 20:03:47,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 246 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-12-13 20:03:47,361 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 194 flow [2022-12-13 20:03:47,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2022-12-13 20:03:47,362 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 7 predicate places. [2022-12-13 20:03:47,362 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 194 flow [2022-12-13 20:03:47,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:47,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:47,362 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 20:03:47,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 20:03:47,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:47,562 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:03:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1362854162, now seen corresponding path program 3 times [2022-12-13 20:03:47,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:47,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160103123] [2022-12-13 20:03:47,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:03:47,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:03:47,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:47,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:03:47,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 20:03:47,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 20:03:47,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:47,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:03:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:47,783 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:03:47,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:03:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:48,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:50,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160103123] [2022-12-13 20:03:50,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160103123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:50,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:50,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 20:03:50,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024804239] [2022-12-13 20:03:50,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:50,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:03:50,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:03:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:04:14,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 572 [2022-12-13 20:04:14,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 238.0) internal successors, (5712), 24 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:14,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:14,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 572 [2022-12-13 20:04:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:31,556 INFO L130 PetriNetUnfolder]: 1201/2275 cut-off events. [2022-12-13 20:04:31,556 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2022-12-13 20:04:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5042 conditions, 2275 events. 1201/2275 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13371 event pairs, 631 based on Foata normal form. 12/1860 useless extension candidates. Maximal degree in co-relation 5019. Up to 504 conditions per place. [2022-12-13 20:04:31,562 INFO L137 encePairwiseOnDemand]: 568/572 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2022-12-13 20:04:31,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 322 transitions, 1810 flow [2022-12-13 20:04:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:04:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 20:04:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5999 transitions. [2022-12-13 20:04:31,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43699009324009325 [2022-12-13 20:04:31,569 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5999 transitions. [2022-12-13 20:04:31,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5999 transitions. [2022-12-13 20:04:31,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:31,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5999 transitions. [2022-12-13 20:04:31,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 249.95833333333334) internal successors, (5999), 24 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:31,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 572.0) internal successors, (14300), 25 states have internal predecessors, (14300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:31,585 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 572.0) internal successors, (14300), 25 states have internal predecessors, (14300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:31,585 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 194 flow. Second operand 24 states and 5999 transitions. [2022-12-13 20:04:31,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 322 transitions, 1810 flow [2022-12-13 20:04:31,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 322 transitions, 1786 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:04:31,589 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 376 flow [2022-12-13 20:04:31,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=376, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2022-12-13 20:04:31,590 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2022-12-13 20:04:31,590 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 376 flow [2022-12-13 20:04:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 238.0) internal successors, (5712), 24 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:31,591 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:31,591 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:31,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 20:04:31,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:31,791 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1223770055, now seen corresponding path program 1 times [2022-12-13 20:04:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12904094] [2022-12-13 20:04:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:04:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:31,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:31,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 20:04:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:04:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:31,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:31,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12904094] [2022-12-13 20:04:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12904094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:31,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864503493] [2022-12-13 20:04:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:31,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 572 [2022-12-13 20:04:31,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:31,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:31,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 572 [2022-12-13 20:04:31,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:32,796 INFO L130 PetriNetUnfolder]: 1493/2798 cut-off events. [2022-12-13 20:04:32,797 INFO L131 PetriNetUnfolder]: For 462/462 co-relation queries the response was YES. [2022-12-13 20:04:32,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6329 conditions, 2798 events. 1493/2798 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 15553 event pairs, 504 based on Foata normal form. 0/2504 useless extension candidates. Maximal degree in co-relation 6293. Up to 1560 conditions per place. [2022-12-13 20:04:32,804 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 62 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2022-12-13 20:04:32,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 68 transitions, 559 flow [2022-12-13 20:04:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1186 transitions. [2022-12-13 20:04:32,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41468531468531467 [2022-12-13 20:04:32,807 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1186 transitions. [2022-12-13 20:04:32,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1186 transitions. [2022-12-13 20:04:32,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:32,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1186 transitions. [2022-12-13 20:04:32,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:32,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:32,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:32,811 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 376 flow. Second operand 5 states and 1186 transitions. [2022-12-13 20:04:32,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 68 transitions, 559 flow [2022-12-13 20:04:32,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 68 transitions, 511 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 20:04:32,820 INFO L231 Difference]: Finished difference. Result has 86 places, 50 transitions, 363 flow [2022-12-13 20:04:32,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=86, PETRI_TRANSITIONS=50} [2022-12-13 20:04:32,820 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 38 predicate places. [2022-12-13 20:04:32,821 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 50 transitions, 363 flow [2022-12-13 20:04:32,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:32,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:32,821 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:32,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 20:04:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:33,022 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash 37925061, now seen corresponding path program 2 times [2022-12-13 20:04:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016892015] [2022-12-13 20:04:33,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:04:33,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:33,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:33,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:33,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 20:04:33,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:04:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:33,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:33,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:33,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016892015] [2022-12-13 20:04:33,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016892015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:33,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:33,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:33,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701611967] [2022-12-13 20:04:33,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:33,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 572 [2022-12-13 20:04:33,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 50 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:33,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:33,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 572 [2022-12-13 20:04:33,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:34,263 INFO L130 PetriNetUnfolder]: 2203/4127 cut-off events. [2022-12-13 20:04:34,263 INFO L131 PetriNetUnfolder]: For 3115/3115 co-relation queries the response was YES. [2022-12-13 20:04:34,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12293 conditions, 4127 events. 2203/4127 cut-off events. For 3115/3115 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 25107 event pairs, 840 based on Foata normal form. 40/3607 useless extension candidates. Maximal degree in co-relation 12254. Up to 2608 conditions per place. [2022-12-13 20:04:34,275 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 67 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-12-13 20:04:34,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 75 transitions, 622 flow [2022-12-13 20:04:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1192 transitions. [2022-12-13 20:04:34,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167832167832168 [2022-12-13 20:04:34,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1192 transitions. [2022-12-13 20:04:34,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1192 transitions. [2022-12-13 20:04:34,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:34,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1192 transitions. [2022-12-13 20:04:34,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.4) internal successors, (1192), 5 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:34,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:34,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:34,281 INFO L175 Difference]: Start difference. First operand has 86 places, 50 transitions, 363 flow. Second operand 5 states and 1192 transitions. [2022-12-13 20:04:34,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 75 transitions, 622 flow [2022-12-13 20:04:34,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 75 transitions, 593 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 20:04:34,292 INFO L231 Difference]: Finished difference. Result has 92 places, 55 transitions, 414 flow [2022-12-13 20:04:34,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=92, PETRI_TRANSITIONS=55} [2022-12-13 20:04:34,293 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2022-12-13 20:04:34,293 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 55 transitions, 414 flow [2022-12-13 20:04:34,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:34,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:34,293 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:34,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 20:04:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:34,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1264355457, now seen corresponding path program 3 times [2022-12-13 20:04:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586872949] [2022-12-13 20:04:34,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:04:34,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:34,500 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:34,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 20:04:34,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 20:04:34,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:34,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:34,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586872949] [2022-12-13 20:04:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586872949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:34,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000087300] [2022-12-13 20:04:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:34,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 572 [2022-12-13 20:04:34,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 55 transitions, 414 flow. Second operand has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:34,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:34,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 572 [2022-12-13 20:04:34,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:35,970 INFO L130 PetriNetUnfolder]: 2403/4447 cut-off events. [2022-12-13 20:04:35,970 INFO L131 PetriNetUnfolder]: For 7211/7211 co-relation queries the response was YES. [2022-12-13 20:04:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15936 conditions, 4447 events. 2403/4447 cut-off events. For 7211/7211 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 27074 event pairs, 880 based on Foata normal form. 80/4247 useless extension candidates. Maximal degree in co-relation 15894. Up to 2368 conditions per place. [2022-12-13 20:04:35,988 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 64 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2022-12-13 20:04:35,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 79 transitions, 679 flow [2022-12-13 20:04:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1182 transitions. [2022-12-13 20:04:35,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4132867132867133 [2022-12-13 20:04:35,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1182 transitions. [2022-12-13 20:04:35,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1182 transitions. [2022-12-13 20:04:35,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:35,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1182 transitions. [2022-12-13 20:04:35,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.4) internal successors, (1182), 5 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:35,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:35,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:35,996 INFO L175 Difference]: Start difference. First operand has 92 places, 55 transitions, 414 flow. Second operand 5 states and 1182 transitions. [2022-12-13 20:04:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 79 transitions, 679 flow [2022-12-13 20:04:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 79 transitions, 655 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 20:04:36,014 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 510 flow [2022-12-13 20:04:36,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2022-12-13 20:04:36,014 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 50 predicate places. [2022-12-13 20:04:36,014 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 510 flow [2022-12-13 20:04:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:36,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:36,015 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:36,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 20:04:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:36,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1144257141, now seen corresponding path program 4 times [2022-12-13 20:04:36,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:36,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983160589] [2022-12-13 20:04:36,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:04:36,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:36,222 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:36,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 20:04:36,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:04:36,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:36,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:36,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:36,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:36,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983160589] [2022-12-13 20:04:36,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983160589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:36,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79102277] [2022-12-13 20:04:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:36,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 572 [2022-12-13 20:04:36,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 510 flow. Second operand has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:36,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:36,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 572 [2022-12-13 20:04:36,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:37,600 INFO L130 PetriNetUnfolder]: 2323/4367 cut-off events. [2022-12-13 20:04:37,600 INFO L131 PetriNetUnfolder]: For 11516/11516 co-relation queries the response was YES. [2022-12-13 20:04:37,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17139 conditions, 4367 events. 2323/4367 cut-off events. For 11516/11516 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 26854 event pairs, 1000 based on Foata normal form. 80/4167 useless extension candidates. Maximal degree in co-relation 17094. Up to 3488 conditions per place. [2022-12-13 20:04:37,616 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 62 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2022-12-13 20:04:37,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 78 transitions, 755 flow [2022-12-13 20:04:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1176 transitions. [2022-12-13 20:04:37,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4111888111888112 [2022-12-13 20:04:37,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1176 transitions. [2022-12-13 20:04:37,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1176 transitions. [2022-12-13 20:04:37,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:37,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1176 transitions. [2022-12-13 20:04:37,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:37,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:37,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:37,622 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 510 flow. Second operand 5 states and 1176 transitions. [2022-12-13 20:04:37,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 78 transitions, 755 flow [2022-12-13 20:04:37,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 78 transitions, 736 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 20:04:37,651 INFO L231 Difference]: Finished difference. Result has 103 places, 69 transitions, 614 flow [2022-12-13 20:04:37,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=103, PETRI_TRANSITIONS=69} [2022-12-13 20:04:37,651 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 55 predicate places. [2022-12-13 20:04:37,651 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 69 transitions, 614 flow [2022-12-13 20:04:37,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:37,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:37,652 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:37,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 20:04:37,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:37,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2048463013, now seen corresponding path program 5 times [2022-12-13 20:04:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:37,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308670672] [2022-12-13 20:04:37,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:04:37,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:37,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:37,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:37,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 20:04:37,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:04:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:38,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:38,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:38,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308670672] [2022-12-13 20:04:38,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308670672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:38,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:38,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966056114] [2022-12-13 20:04:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:38,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 572 [2022-12-13 20:04:38,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 69 transitions, 614 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:38,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:38,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 572 [2022-12-13 20:04:38,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:39,312 INFO L130 PetriNetUnfolder]: 2343/4427 cut-off events. [2022-12-13 20:04:39,312 INFO L131 PetriNetUnfolder]: For 14751/14751 co-relation queries the response was YES. [2022-12-13 20:04:39,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19381 conditions, 4427 events. 2343/4427 cut-off events. For 14751/14751 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 27452 event pairs, 760 based on Foata normal form. 40/4187 useless extension candidates. Maximal degree in co-relation 19334. Up to 2408 conditions per place. [2022-12-13 20:04:39,329 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 65 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2022-12-13 20:04:39,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 84 transitions, 836 flow [2022-12-13 20:04:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1195 transitions. [2022-12-13 20:04:39,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4178321678321678 [2022-12-13 20:04:39,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1195 transitions. [2022-12-13 20:04:39,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1195 transitions. [2022-12-13 20:04:39,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:39,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1195 transitions. [2022-12-13 20:04:39,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:39,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:39,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:39,334 INFO L175 Difference]: Start difference. First operand has 103 places, 69 transitions, 614 flow. Second operand 5 states and 1195 transitions. [2022-12-13 20:04:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 84 transitions, 836 flow [2022-12-13 20:04:39,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 84 transitions, 780 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-12-13 20:04:39,406 INFO L231 Difference]: Finished difference. Result has 106 places, 71 transitions, 621 flow [2022-12-13 20:04:39,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=621, PETRI_PLACES=106, PETRI_TRANSITIONS=71} [2022-12-13 20:04:39,407 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 58 predicate places. [2022-12-13 20:04:39,407 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 71 transitions, 621 flow [2022-12-13 20:04:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:39,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:39,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:39,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 20:04:39,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:39,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 90848555, now seen corresponding path program 6 times [2022-12-13 20:04:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:39,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246450751] [2022-12-13 20:04:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:04:39,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:39,614 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:39,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 20:04:39,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 20:04:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:04:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:39,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:04:39,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:39,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246450751] [2022-12-13 20:04:39,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246450751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:04:39,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:04:39,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:04:39,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210443725] [2022-12-13 20:04:39,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:04:39,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:04:39,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:39,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:04:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:04:39,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 572 [2022-12-13 20:04:39,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 71 transitions, 621 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:39,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:39,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 572 [2022-12-13 20:04:39,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:41,093 INFO L130 PetriNetUnfolder]: 2323/4287 cut-off events. [2022-12-13 20:04:41,093 INFO L131 PetriNetUnfolder]: For 14197/14197 co-relation queries the response was YES. [2022-12-13 20:04:41,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18102 conditions, 4287 events. 2323/4287 cut-off events. For 14197/14197 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 25698 event pairs, 980 based on Foata normal form. 40/4047 useless extension candidates. Maximal degree in co-relation 18054. Up to 3348 conditions per place. [2022-12-13 20:04:41,111 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 65 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2022-12-13 20:04:41,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 82 transitions, 833 flow [2022-12-13 20:04:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:04:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:04:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1191 transitions. [2022-12-13 20:04:41,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41643356643356644 [2022-12-13 20:04:41,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1191 transitions. [2022-12-13 20:04:41,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1191 transitions. [2022-12-13 20:04:41,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:41,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1191 transitions. [2022-12-13 20:04:41,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.2) internal successors, (1191), 5 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:41,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:41,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:41,116 INFO L175 Difference]: Start difference. First operand has 106 places, 71 transitions, 621 flow. Second operand 5 states and 1191 transitions. [2022-12-13 20:04:41,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 82 transitions, 833 flow [2022-12-13 20:04:41,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 82 transitions, 783 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 20:04:41,161 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 638 flow [2022-12-13 20:04:41,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=638, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2022-12-13 20:04:41,161 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2022-12-13 20:04:41,161 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 638 flow [2022-12-13 20:04:41,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:41,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:41,162 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:41,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-13 20:04:41,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:41,363 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1489366162, now seen corresponding path program 1 times [2022-12-13 20:04:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74945463] [2022-12-13 20:04:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:04:41,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:41,368 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:41,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 20:04:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:04:41,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:04:41,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:04:41,598 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 64 treesize of output 62 [2022-12-13 20:04:41,602 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 62 treesize of output 60 [2022-12-13 20:04:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:41,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74945463] [2022-12-13 20:04:41,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74945463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:04:41,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:04:41,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 20:04:41,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318920310] [2022-12-13 20:04:41,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:04:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:04:41,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:41,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:04:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:04:42,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 572 [2022-12-13 20:04:42,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 638 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:42,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:42,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 572 [2022-12-13 20:04:42,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:45,995 INFO L130 PetriNetUnfolder]: 5503/10427 cut-off events. [2022-12-13 20:04:45,995 INFO L131 PetriNetUnfolder]: For 25611/25611 co-relation queries the response was YES. [2022-12-13 20:04:46,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40423 conditions, 10427 events. 5503/10427 cut-off events. For 25611/25611 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 76733 event pairs, 760 based on Foata normal form. 240/9907 useless extension candidates. Maximal degree in co-relation 40374. Up to 3441 conditions per place. [2022-12-13 20:04:46,037 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 117 selfloop transitions, 42 changer transitions 0/159 dead transitions. [2022-12-13 20:04:46,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 159 transitions, 1303 flow [2022-12-13 20:04:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:04:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 20:04:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3286 transitions. [2022-12-13 20:04:46,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41033966033966035 [2022-12-13 20:04:46,041 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3286 transitions. [2022-12-13 20:04:46,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3286 transitions. [2022-12-13 20:04:46,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:46,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3286 transitions. [2022-12-13 20:04:46,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 234.71428571428572) internal successors, (3286), 14 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:46,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 572.0) internal successors, (8580), 15 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:46,048 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 572.0) internal successors, (8580), 15 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:46,048 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 638 flow. Second operand 14 states and 3286 transitions. [2022-12-13 20:04:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 159 transitions, 1303 flow [2022-12-13 20:04:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 159 transitions, 1240 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 20:04:46,183 INFO L231 Difference]: Finished difference. Result has 125 places, 94 transitions, 869 flow [2022-12-13 20:04:46,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=869, PETRI_PLACES=125, PETRI_TRANSITIONS=94} [2022-12-13 20:04:46,183 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 77 predicate places. [2022-12-13 20:04:46,183 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 94 transitions, 869 flow [2022-12-13 20:04:46,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:46,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:46,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:46,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 20:04:46,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:46,385 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1999309768, now seen corresponding path program 2 times [2022-12-13 20:04:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558338061] [2022-12-13 20:04:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:04:46,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:46,391 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:46,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 20:04:46,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:04:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:04:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:46,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:04:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:46,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:46,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558338061] [2022-12-13 20:04:46,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558338061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:04:46,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:04:46,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 20:04:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276540589] [2022-12-13 20:04:46,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:04:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:04:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:04:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:04:47,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 572 [2022-12-13 20:04:47,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 94 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 231.3) internal successors, (2313), 10 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:47,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:47,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 572 [2022-12-13 20:04:47,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:51,274 INFO L130 PetriNetUnfolder]: 5743/10987 cut-off events. [2022-12-13 20:04:51,274 INFO L131 PetriNetUnfolder]: For 56609/56609 co-relation queries the response was YES. [2022-12-13 20:04:51,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53750 conditions, 10987 events. 5743/10987 cut-off events. For 56609/56609 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 81534 event pairs, 800 based on Foata normal form. 240/10707 useless extension candidates. Maximal degree in co-relation 53694. Up to 3761 conditions per place. [2022-12-13 20:04:51,357 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 138 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2022-12-13 20:04:51,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 194 transitions, 1894 flow [2022-12-13 20:04:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:04:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 20:04:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3782 transitions. [2022-12-13 20:04:51,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413243006993007 [2022-12-13 20:04:51,361 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3782 transitions. [2022-12-13 20:04:51,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3782 transitions. [2022-12-13 20:04:51,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:51,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3782 transitions. [2022-12-13 20:04:51,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 236.375) internal successors, (3782), 16 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:51,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 572.0) internal successors, (9724), 17 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:51,369 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 572.0) internal successors, (9724), 17 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:51,369 INFO L175 Difference]: Start difference. First operand has 125 places, 94 transitions, 869 flow. Second operand 16 states and 3782 transitions. [2022-12-13 20:04:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 194 transitions, 1894 flow [2022-12-13 20:04:51,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 194 transitions, 1726 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-12-13 20:04:51,797 INFO L231 Difference]: Finished difference. Result has 145 places, 120 transitions, 1200 flow [2022-12-13 20:04:51,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1200, PETRI_PLACES=145, PETRI_TRANSITIONS=120} [2022-12-13 20:04:51,797 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 97 predicate places. [2022-12-13 20:04:51,798 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 120 transitions, 1200 flow [2022-12-13 20:04:51,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 231.3) internal successors, (2313), 10 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:51,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:51,798 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:51,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 20:04:51,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:51,999 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2024477030, now seen corresponding path program 3 times [2022-12-13 20:04:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:52,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42528848] [2022-12-13 20:04:52,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:04:52,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:52,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:52,004 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:52,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 20:04:52,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:04:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:04:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:52,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:04:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:52,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:04:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42528848] [2022-12-13 20:04:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42528848] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:04:52,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:04:52,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 20:04:52,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98357085] [2022-12-13 20:04:52,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:04:52,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:04:52,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:04:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:04:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:04:53,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 572 [2022-12-13 20:04:53,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 120 transitions, 1200 flow. Second operand has 10 states, 10 states have (on average 230.2) internal successors, (2302), 10 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:53,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:04:53,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 572 [2022-12-13 20:04:53,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:56,895 INFO L130 PetriNetUnfolder]: 5443/10087 cut-off events. [2022-12-13 20:04:56,895 INFO L131 PetriNetUnfolder]: For 65871/65871 co-relation queries the response was YES. [2022-12-13 20:04:56,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53799 conditions, 10087 events. 5443/10087 cut-off events. For 65871/65871 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 71098 event pairs, 880 based on Foata normal form. 400/9967 useless extension candidates. Maximal degree in co-relation 53734. Up to 3361 conditions per place. [2022-12-13 20:04:56,952 INFO L137 encePairwiseOnDemand]: 566/572 looper letters, 114 selfloop transitions, 67 changer transitions 0/181 dead transitions. [2022-12-13 20:04:56,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 181 transitions, 1875 flow [2022-12-13 20:04:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:04:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 20:04:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3065 transitions. [2022-12-13 20:04:56,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4121839698762776 [2022-12-13 20:04:56,956 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3065 transitions. [2022-12-13 20:04:56,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3065 transitions. [2022-12-13 20:04:56,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:56,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3065 transitions. [2022-12-13 20:04:56,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 235.76923076923077) internal successors, (3065), 13 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:56,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 572.0) internal successors, (8008), 14 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:56,962 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 572.0) internal successors, (8008), 14 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:56,962 INFO L175 Difference]: Start difference. First operand has 145 places, 120 transitions, 1200 flow. Second operand 13 states and 3065 transitions. [2022-12-13 20:04:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 181 transitions, 1875 flow [2022-12-13 20:04:57,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 181 transitions, 1739 flow, removed 53 selfloop flow, removed 3 redundant places. [2022-12-13 20:04:57,773 INFO L231 Difference]: Finished difference. Result has 156 places, 127 transitions, 1331 flow [2022-12-13 20:04:57,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1331, PETRI_PLACES=156, PETRI_TRANSITIONS=127} [2022-12-13 20:04:57,774 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 108 predicate places. [2022-12-13 20:04:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 127 transitions, 1331 flow [2022-12-13 20:04:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 230.2) internal successors, (2302), 10 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:57,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:04:57,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:57,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 20:04:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:57,975 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:04:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1798237496, now seen corresponding path program 4 times [2022-12-13 20:04:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:04:57,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075701251] [2022-12-13 20:04:57,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:04:57,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:04:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:04:57,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:04:57,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a07fed-4d95-4bb0-87c1-a0c93c693955/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 20:04:58,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:04:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:04:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:58,337 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 411 treesize of output 405 [2022-12-13 20:04:58,344 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 405 treesize of output 399 [2022-12-13 20:05:13,631 INFO L321 Elim1Store]: treesize reduction 516, result has 2.5 percent of original size [2022-12-13 20:05:13,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1130 treesize of output 201 [2022-12-13 20:05:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:05:15,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:05:23,603 INFO L321 Elim1Store]: treesize reduction 1008, result has 22.3 percent of original size [2022-12-13 20:05:23,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 529 treesize of output 677 [2022-12-13 20:05:23,629 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 380 treesize of output 374 [2022-12-13 20:05:23,655 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 374 treesize of output 368