./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- 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 16:54:35,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:54:35,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:54:35,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:54:35,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:54:35,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:54:35,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:54:35,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:54:35,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:54:35,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:54:35,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:54:35,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:54:35,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:54:35,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:54:35,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:54:35,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:54:35,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:54:35,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:54:35,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:54:35,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:54:35,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:54:35,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:54:35,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:54:35,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:54:35,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:54:35,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:54:35,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:54:35,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:54:35,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:54:35,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:54:35,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:54:35,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:54:35,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:54:35,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:54:35,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:54:35,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:54:35,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:54:35,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:54:35,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:54:35,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:54:35,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:54:35,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:54:35,868 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:54:35,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:54:35,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:54:35,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:54:35,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:54:35,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:54:35,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:54:35,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:54:35,870 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:54:35,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:54:35,871 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:54:35,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:54:35,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:54:35,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:54:35,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:54:35,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:54:35,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:54:35,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:54:35,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:54:35,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:54:35,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:54:35,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:54:35,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:54:35,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:54:35,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:54:35,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:54:35,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:54:35,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:54:35,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:54:35,875 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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2022-12-13 16:54:36,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:54:36,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:54:36,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:54:36,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:54:36,095 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:54:36,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-13 16:54:38,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:54:38,912 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:54:38,912 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-13 16:54:38,936 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/data/87abe75b4/fe1bf763651a433fbe1103a11c106471/FLAGcf1c2940f [2022-12-13 16:54:38,947 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/data/87abe75b4/fe1bf763651a433fbe1103a11c106471 [2022-12-13 16:54:38,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:54:38,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:54:38,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:54:38,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:54:38,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:54:38,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:54:38" (1/1) ... [2022-12-13 16:54:38,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29dc1902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:38, skipping insertion in model container [2022-12-13 16:54:38,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:54:38" (1/1) ... [2022-12-13 16:54:38,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:54:39,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:54:39,142 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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-13 16:54:39,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:54:39,480 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:54:39,489 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_58c28da6-a9ab-4342-b717-fa4e1f54efe7/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-13 16:54:39,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:54:39,591 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:54:39,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39 WrapperNode [2022-12-13 16:54:39,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:54:39,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:54:39,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:54:39,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:54:39,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,630 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-13 16:54:39,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:54:39,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:54:39,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:54:39,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:54:39,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:54:39,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:54:39,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:54:39,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:54:39,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (1/1) ... [2022-12-13 16:54:39,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:54:39,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:39,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:54:39,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:54:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:54:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:54:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:54:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:54:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:54:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:54:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-13 16:54:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-13 16:54:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:54:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:54:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:54:39,715 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 16:54:39,814 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:54:39,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:54:39,963 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:54:39,970 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:54:39,970 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:54:39,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:54:39 BoogieIcfgContainer [2022-12-13 16:54:39,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:54:39,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:54:39,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:54:39,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:54:39,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:54:38" (1/3) ... [2022-12-13 16:54:39,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a66ddac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:54:39, skipping insertion in model container [2022-12-13 16:54:39,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:39" (2/3) ... [2022-12-13 16:54:39,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a66ddac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:54:39, skipping insertion in model container [2022-12-13 16:54:39,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:54:39" (3/3) ... [2022-12-13 16:54:39,980 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-13 16:54:39,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:54:39,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 16:54:39,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:54:40,045 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 16:54:40,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 208 flow [2022-12-13 16:54:40,125 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 16:54:40,126 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:54:40,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-13 16:54:40,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 100 transitions, 208 flow [2022-12-13 16:54:40,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 94 transitions, 194 flow [2022-12-13 16:54:40,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:54:40,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 94 transitions, 194 flow [2022-12-13 16:54:40,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 94 transitions, 194 flow [2022-12-13 16:54:40,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 94 transitions, 194 flow [2022-12-13 16:54:40,174 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-12-13 16:54:40,174 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:54:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-13 16:54:40,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2022-12-13 16:54:41,834 INFO L134 LiptonReduction]: Checked pairs total: 1137 [2022-12-13 16:54:41,834 INFO L136 LiptonReduction]: Total number of compositions: 91 [2022-12-13 16:54:41,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:54:41,849 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;@743fa2c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:54:41,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 16:54:41,851 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 16:54:41,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:54:41,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:41,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 16:54:41,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash 374, now seen corresponding path program 1 times [2022-12-13 16:54:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:41,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938337245] [2022-12-13 16:54:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:41,934 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 16:54:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938337245] [2022-12-13 16:54:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938337245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:41,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:41,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 16:54:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596480237] [2022-12-13 16:54:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:54:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:54:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:54:41,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 191 [2022-12-13 16:54:41,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:41,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:41,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 191 [2022-12-13 16:54:41,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:42,000 INFO L130 PetriNetUnfolder]: 37/80 cut-off events. [2022-12-13 16:54:42,000 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:54:42,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 80 events. 37/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 244 event pairs, 25 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 148. Up to 77 conditions per place. [2022-12-13 16:54:42,002 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 16 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 16:54:42,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2022-12-13 16:54:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:54:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 16:54:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-12-13 16:54:42,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5209424083769634 [2022-12-13 16:54:42,012 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-12-13 16:54:42,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-12-13 16:54:42,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:42,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-12-13 16:54:42,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,021 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,022 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 2 states and 199 transitions. [2022-12-13 16:54:42,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2022-12-13 16:54:42,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:54:42,025 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 36 flow [2022-12-13 16:54:42,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2022-12-13 16:54:42,030 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -4 predicate places. [2022-12-13 16:54:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 36 flow [2022-12-13 16:54:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:42,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 16:54:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:54:42,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 11424379, now seen corresponding path program 1 times [2022-12-13 16:54:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027941735] [2022-12-13 16:54:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:42,134 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 16:54:42,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:42,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027941735] [2022-12-13 16:54:42,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027941735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:42,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:42,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:54:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55982751] [2022-12-13 16:54:42,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:42,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:42,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:42,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:42,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:42,197 INFO L130 PetriNetUnfolder]: 49/112 cut-off events. [2022-12-13 16:54:42,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:54:42,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 49/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 369 event pairs, 25 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 213. Up to 77 conditions per place. [2022-12-13 16:54:42,198 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-13 16:54:42,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 100 flow [2022-12-13 16:54:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2022-12-13 16:54:42,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49214659685863876 [2022-12-13 16:54:42,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2022-12-13 16:54:42,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2022-12-13 16:54:42,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:42,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2022-12-13 16:54:42,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,206 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 36 flow. Second operand 3 states and 282 transitions. [2022-12-13 16:54:42,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 100 flow [2022-12-13 16:54:42,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:54:42,207 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 52 flow [2022-12-13 16:54:42,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2022-12-13 16:54:42,208 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-12-13 16:54:42,208 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 52 flow [2022-12-13 16:54:42,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:42,209 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:42,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:54:42,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1040854052, now seen corresponding path program 1 times [2022-12-13 16:54:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504051294] [2022-12-13 16:54:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:42,287 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 16:54:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504051294] [2022-12-13 16:54:42,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504051294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729533670] [2022-12-13 16:54:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:42,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:54:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:54:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:42,380 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 16:54:42,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:42,398 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 16:54:42,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729533670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:42,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:42,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:54:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952090856] [2022-12-13 16:54:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:54:42,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 191 [2022-12-13 16:54:42,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:42,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 191 [2022-12-13 16:54:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:42,523 INFO L130 PetriNetUnfolder]: 79/184 cut-off events. [2022-12-13 16:54:42,523 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-12-13 16:54:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 79/184 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 552 event pairs, 20 based on Foata normal form. 18/177 useless extension candidates. Maximal degree in co-relation 399. Up to 59 conditions per place. [2022-12-13 16:54:42,524 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 41 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2022-12-13 16:54:42,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 48 transitions, 210 flow [2022-12-13 16:54:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 560 transitions. [2022-12-13 16:54:42,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2022-12-13 16:54:42,527 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 560 transitions. [2022-12-13 16:54:42,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 560 transitions. [2022-12-13 16:54:42,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:42,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 560 transitions. [2022-12-13 16:54:42,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,533 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 52 flow. Second operand 6 states and 560 transitions. [2022-12-13 16:54:42,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 48 transitions, 210 flow [2022-12-13 16:54:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:42,534 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 102 flow [2022-12-13 16:54:42,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2022-12-13 16:54:42,535 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2022-12-13 16:54:42,535 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 102 flow [2022-12-13 16:54:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:42,536 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2022-12-13 16:54:42,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:42,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1635168571, now seen corresponding path program 2 times [2022-12-13 16:54:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:42,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985572269] [2022-12-13 16:54:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 16:54:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985572269] [2022-12-13 16:54:42,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985572269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:42,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:42,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305016985] [2022-12-13 16:54:42,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:42,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:42,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:42,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 191 [2022-12-13 16:54:42,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:42,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 191 [2022-12-13 16:54:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:43,019 INFO L130 PetriNetUnfolder]: 73/164 cut-off events. [2022-12-13 16:54:43,019 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-12-13 16:54:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 164 events. 73/164 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 463 event pairs, 55 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 481. Up to 148 conditions per place. [2022-12-13 16:54:43,021 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 18 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2022-12-13 16:54:43,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 130 flow [2022-12-13 16:54:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2022-12-13 16:54:43,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4572425828970332 [2022-12-13 16:54:43,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2022-12-13 16:54:43,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2022-12-13 16:54:43,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:43,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2022-12-13 16:54:43,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,027 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 102 flow. Second operand 3 states and 262 transitions. [2022-12-13 16:54:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 130 flow [2022-12-13 16:54:43,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 122 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:43,029 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 86 flow [2022-12-13 16:54:43,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2022-12-13 16:54:43,030 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2022-12-13 16:54:43,030 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 86 flow [2022-12-13 16:54:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:43,030 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2022-12-13 16:54:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:54:43,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1635168572, now seen corresponding path program 1 times [2022-12-13 16:54:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080905363] [2022-12-13 16:54:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:43,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080905363] [2022-12-13 16:54:43,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080905363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347678795] [2022-12-13 16:54:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:43,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:43,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:54:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:54:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347678795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:43,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:43,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:54:43,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167308994] [2022-12-13 16:54:43,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:43,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:54:43,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:43,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:54:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:43,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 191 [2022-12-13 16:54:43,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 85.92307692307692) internal successors, (1117), 13 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:43,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 191 [2022-12-13 16:54:43,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:43,475 INFO L130 PetriNetUnfolder]: 145/352 cut-off events. [2022-12-13 16:54:43,475 INFO L131 PetriNetUnfolder]: For 362/362 co-relation queries the response was YES. [2022-12-13 16:54:43,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 352 events. 145/352 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1072 event pairs, 15 based on Foata normal form. 36/358 useless extension candidates. Maximal degree in co-relation 934. Up to 72 conditions per place. [2022-12-13 16:54:43,478 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 82 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2022-12-13 16:54:43,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 95 transitions, 478 flow [2022-12-13 16:54:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:54:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:54:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1114 transitions. [2022-12-13 16:54:43,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4860383944153578 [2022-12-13 16:54:43,482 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1114 transitions. [2022-12-13 16:54:43,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1114 transitions. [2022-12-13 16:54:43,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:43,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1114 transitions. [2022-12-13 16:54:43,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.83333333333333) internal successors, (1114), 12 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 191.0) internal successors, (2483), 13 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,492 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 191.0) internal successors, (2483), 13 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,492 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 86 flow. Second operand 12 states and 1114 transitions. [2022-12-13 16:54:43,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 95 transitions, 478 flow [2022-12-13 16:54:43,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 95 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:43,495 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 193 flow [2022-12-13 16:54:43,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=193, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2022-12-13 16:54:43,496 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2022-12-13 16:54:43,496 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 193 flow [2022-12-13 16:54:43,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.92307692307692) internal successors, (1117), 13 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:43,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:43,497 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2022-12-13 16:54:43,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:54:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:43,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 292356956, now seen corresponding path program 2 times [2022-12-13 16:54:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:43,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973650337] [2022-12-13 16:54:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973650337] [2022-12-13 16:54:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973650337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85038663] [2022-12-13 16:54:43,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:43,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:43,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:43,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:54:43,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:54:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:54:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 16:54:44,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:44,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85038663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:44,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:44,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [12] total 13 [2022-12-13 16:54:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461491903] [2022-12-13 16:54:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:44,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:44,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:54:44,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:44,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:44,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:44,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:44,160 INFO L130 PetriNetUnfolder]: 139/324 cut-off events. [2022-12-13 16:54:44,160 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2022-12-13 16:54:44,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 324 events. 139/324 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 942 event pairs, 110 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 1062. Up to 280 conditions per place. [2022-12-13 16:54:44,164 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-12-13 16:54:44,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 26 transitions, 221 flow [2022-12-13 16:54:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-12-13 16:54:44,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4712041884816754 [2022-12-13 16:54:44,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-12-13 16:54:44,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-12-13 16:54:44,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:44,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-12-13 16:54:44,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,167 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 193 flow. Second operand 3 states and 270 transitions. [2022-12-13 16:54:44,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 26 transitions, 221 flow [2022-12-13 16:54:44,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:54:44,170 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 167 flow [2022-12-13 16:54:44,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2022-12-13 16:54:44,170 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2022-12-13 16:54:44,170 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 167 flow [2022-12-13 16:54:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:44,171 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:44,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:54:44,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 16:54:44,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1512552873, now seen corresponding path program 1 times [2022-12-13 16:54:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:44,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433165487] [2022-12-13 16:54:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:54:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433165487] [2022-12-13 16:54:44,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433165487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:44,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:44,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:54:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286665174] [2022-12-13 16:54:44,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:44,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:44,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 191 [2022-12-13 16:54:44,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:44,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 191 [2022-12-13 16:54:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:44,625 INFO L130 PetriNetUnfolder]: 231/508 cut-off events. [2022-12-13 16:54:44,626 INFO L131 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2022-12-13 16:54:44,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 508 events. 231/508 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1994 event pairs, 110 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 1705. Up to 281 conditions per place. [2022-12-13 16:54:44,630 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 42 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 16:54:44,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 403 flow [2022-12-13 16:54:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2022-12-13 16:54:44,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49040139616055844 [2022-12-13 16:54:44,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2022-12-13 16:54:44,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2022-12-13 16:54:44,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:44,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2022-12-13 16:54:44,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,635 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 167 flow. Second operand 3 states and 281 transitions. [2022-12-13 16:54:44,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 403 flow [2022-12-13 16:54:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:44,640 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 178 flow [2022-12-13 16:54:44,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2022-12-13 16:54:44,641 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2022-12-13 16:54:44,641 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 178 flow [2022-12-13 16:54:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:44,642 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:54:44,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -730317038, now seen corresponding path program 1 times [2022-12-13 16:54:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444812541] [2022-12-13 16:54:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:54:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444812541] [2022-12-13 16:54:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444812541] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253660926] [2022-12-13 16:54:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:44,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:44,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:54:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:54:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:54:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 16:54:44,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253660926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:44,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:44,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 16:54:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946428837] [2022-12-13 16:54:44,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:44,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:44,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:54:44,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:44,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 89.14285714285714) internal successors, (624), 7 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:44,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:44,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:45,070 INFO L130 PetriNetUnfolder]: 438/898 cut-off events. [2022-12-13 16:54:45,070 INFO L131 PetriNetUnfolder]: For 3542/3542 co-relation queries the response was YES. [2022-12-13 16:54:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 898 events. 438/898 cut-off events. For 3542/3542 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4193 event pairs, 44 based on Foata normal form. 69/967 useless extension candidates. Maximal degree in co-relation 3327. Up to 228 conditions per place. [2022-12-13 16:54:45,077 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 92 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2022-12-13 16:54:45,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 99 transitions, 962 flow [2022-12-13 16:54:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 556 transitions. [2022-12-13 16:54:45,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4851657940663176 [2022-12-13 16:54:45,079 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 556 transitions. [2022-12-13 16:54:45,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 556 transitions. [2022-12-13 16:54:45,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 556 transitions. [2022-12-13 16:54:45,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.66666666666667) internal successors, (556), 6 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:45,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:45,083 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:45,083 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 178 flow. Second operand 6 states and 556 transitions. [2022-12-13 16:54:45,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 99 transitions, 962 flow [2022-12-13 16:54:45,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 99 transitions, 960 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:45,088 INFO L231 Difference]: Finished difference. Result has 54 places, 30 transitions, 216 flow [2022-12-13 16:54:45,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=54, PETRI_TRANSITIONS=30} [2022-12-13 16:54:45,089 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2022-12-13 16:54:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 30 transitions, 216 flow [2022-12-13 16:54:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.14285714285714) internal successors, (624), 7 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:45,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:45,090 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:45,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:54:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:45,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1684683443, now seen corresponding path program 2 times [2022-12-13 16:54:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:45,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290875173] [2022-12-13 16:54:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:54:45,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290875173] [2022-12-13 16:54:45,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290875173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465643244] [2022-12-13 16:54:45,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:45,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:45,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:45,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:54:45,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:54:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:54:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:54:45,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:54:45,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465643244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:45,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:45,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 16:54:45,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025336822] [2022-12-13 16:54:45,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:45,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:54:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:54:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:45,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:45,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 30 transitions, 216 flow. Second operand has 13 states, 13 states have (on average 88.92307692307692) internal successors, (1156), 13 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:45,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:45,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:45,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:46,062 INFO L130 PetriNetUnfolder]: 990/2002 cut-off events. [2022-12-13 16:54:46,062 INFO L131 PetriNetUnfolder]: For 9184/9184 co-relation queries the response was YES. [2022-12-13 16:54:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 2002 events. 990/2002 cut-off events. For 9184/9184 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 10329 event pairs, 44 based on Foata normal form. 138/2140 useless extension candidates. Maximal degree in co-relation 8368. Up to 516 conditions per place. [2022-12-13 16:54:46,073 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 200 selfloop transitions, 12 changer transitions 0/213 dead transitions. [2022-12-13 16:54:46,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 213 transitions, 2172 flow [2022-12-13 16:54:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:54:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:54:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1117 transitions. [2022-12-13 16:54:46,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.487347294938918 [2022-12-13 16:54:46,075 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1117 transitions. [2022-12-13 16:54:46,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1117 transitions. [2022-12-13 16:54:46,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:46,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1117 transitions. [2022-12-13 16:54:46,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.08333333333333) internal successors, (1117), 12 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 191.0) internal successors, (2483), 13 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,093 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 191.0) internal successors, (2483), 13 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,093 INFO L175 Difference]: Start difference. First operand has 54 places, 30 transitions, 216 flow. Second operand 12 states and 1117 transitions. [2022-12-13 16:54:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 213 transitions, 2172 flow [2022-12-13 16:54:46,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 213 transitions, 2152 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:46,105 INFO L231 Difference]: Finished difference. Result has 71 places, 37 transitions, 304 flow [2022-12-13 16:54:46,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=304, PETRI_PLACES=71, PETRI_TRANSITIONS=37} [2022-12-13 16:54:46,106 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 49 predicate places. [2022-12-13 16:54:46,106 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 37 transitions, 304 flow [2022-12-13 16:54:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.92307692307692) internal successors, (1156), 13 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:46,107 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:46,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:54:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:46,308 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1880178975, now seen corresponding path program 3 times [2022-12-13 16:54:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603983728] [2022-12-13 16:54:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 16:54:46,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:46,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603983728] [2022-12-13 16:54:46,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603983728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:46,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688674184] [2022-12-13 16:54:46,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:54:46,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:46,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:46,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:54:46,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 16:54:46,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:54:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 16:54:47,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 16:54:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688674184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:47,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:47,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-12-13 16:54:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027621466] [2022-12-13 16:54:47,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:47,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:54:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:54:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:54:47,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:47,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 37 transitions, 304 flow. Second operand has 23 states, 23 states have (on average 89.17391304347827) internal successors, (2051), 23 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:47,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:47,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:48,036 INFO L130 PetriNetUnfolder]: 1910/3866 cut-off events. [2022-12-13 16:54:48,036 INFO L131 PetriNetUnfolder]: For 25889/25889 co-relation queries the response was YES. [2022-12-13 16:54:48,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17365 conditions, 3866 events. 1910/3866 cut-off events. For 25889/25889 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 20504 event pairs, 74 based on Foata normal form. 230/4096 useless extension candidates. Maximal degree in co-relation 17338. Up to 996 conditions per place. [2022-12-13 16:54:48,056 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 380 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2022-12-13 16:54:48,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 403 transitions, 4236 flow [2022-12-13 16:54:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:54:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:54:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2051 transitions. [2022-12-13 16:54:48,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48810090433127085 [2022-12-13 16:54:48,060 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2051 transitions. [2022-12-13 16:54:48,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2051 transitions. [2022-12-13 16:54:48,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:48,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2051 transitions. [2022-12-13 16:54:48,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.22727272727273) internal successors, (2051), 22 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,067 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,067 INFO L175 Difference]: Start difference. First operand has 71 places, 37 transitions, 304 flow. Second operand 22 states and 2051 transitions. [2022-12-13 16:54:48,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 403 transitions, 4236 flow [2022-12-13 16:54:48,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 403 transitions, 4230 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:54:48,085 INFO L231 Difference]: Finished difference. Result has 100 places, 48 transitions, 498 flow [2022-12-13 16:54:48,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=498, PETRI_PLACES=100, PETRI_TRANSITIONS=48} [2022-12-13 16:54:48,085 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 78 predicate places. [2022-12-13 16:54:48,086 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 48 transitions, 498 flow [2022-12-13 16:54:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.17391304347827) internal successors, (2051), 23 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:48,087 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:48,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:54:48,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:54:48,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1248572441, now seen corresponding path program 4 times [2022-12-13 16:54:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617587251] [2022-12-13 16:54:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-12-13 16:54:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:48,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617587251] [2022-12-13 16:54:48,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617587251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:48,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:48,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:54:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953377834] [2022-12-13 16:54:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:48,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 16:54:48,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 48 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:48,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 16:54:48,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:48,783 INFO L130 PetriNetUnfolder]: 440/1982 cut-off events. [2022-12-13 16:54:48,783 INFO L131 PetriNetUnfolder]: For 19971/19971 co-relation queries the response was YES. [2022-12-13 16:54:48,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9175 conditions, 1982 events. 440/1982 cut-off events. For 19971/19971 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 11173 event pairs, 264 based on Foata normal form. 870/2852 useless extension candidates. Maximal degree in co-relation 9137. Up to 1186 conditions per place. [2022-12-13 16:54:48,793 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 14 selfloop transitions, 37 changer transitions 0/52 dead transitions. [2022-12-13 16:54:48,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 52 transitions, 683 flow [2022-12-13 16:54:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2022-12-13 16:54:48,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4799301919720768 [2022-12-13 16:54:48,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2022-12-13 16:54:48,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2022-12-13 16:54:48,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:48,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2022-12-13 16:54:48,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,796 INFO L175 Difference]: Start difference. First operand has 100 places, 48 transitions, 498 flow. Second operand 3 states and 275 transitions. [2022-12-13 16:54:48,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 52 transitions, 683 flow [2022-12-13 16:54:48,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 52 transitions, 664 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 16:54:48,809 INFO L231 Difference]: Finished difference. Result has 93 places, 48 transitions, 554 flow [2022-12-13 16:54:48,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=554, PETRI_PLACES=93, PETRI_TRANSITIONS=48} [2022-12-13 16:54:48,810 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2022-12-13 16:54:48,810 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 48 transitions, 554 flow [2022-12-13 16:54:48,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:48,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:48,810 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:48,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:54:48,810 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1970391801, now seen corresponding path program 5 times [2022-12-13 16:54:48,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:48,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350125527] [2022-12-13 16:54:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 410 proven. 241 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-12-13 16:54:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350125527] [2022-12-13 16:54:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350125527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34535263] [2022-12-13 16:54:49,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:54:49,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:49,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:49,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:49,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:54:49,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 16:54:49,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:54:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 410 proven. 241 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-12-13 16:54:49,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 410 proven. 241 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-12-13 16:54:49,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34535263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:49,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:49,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-12-13 16:54:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403611193] [2022-12-13 16:54:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:54:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:54:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:54:49,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 191 [2022-12-13 16:54:49,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 48 transitions, 554 flow. Second operand has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:49,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:49,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 191 [2022-12-13 16:54:49,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:50,439 INFO L130 PetriNetUnfolder]: 690/3522 cut-off events. [2022-12-13 16:54:50,439 INFO L131 PetriNetUnfolder]: For 71837/71837 co-relation queries the response was YES. [2022-12-13 16:54:50,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17845 conditions, 3522 events. 690/3522 cut-off events. For 71837/71837 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 23947 event pairs, 104 based on Foata normal form. 830/4352 useless extension candidates. Maximal degree in co-relation 17806. Up to 966 conditions per place. [2022-12-13 16:54:50,459 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 613 selfloop transitions, 22 changer transitions 0/636 dead transitions. [2022-12-13 16:54:50,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 636 transitions, 9612 flow [2022-12-13 16:54:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:54:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:54:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2031 transitions. [2022-12-13 16:54:50,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48334126606377914 [2022-12-13 16:54:50,465 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2031 transitions. [2022-12-13 16:54:50,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2031 transitions. [2022-12-13 16:54:50,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:50,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2031 transitions. [2022-12-13 16:54:50,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 92.31818181818181) internal successors, (2031), 22 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:50,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:50,472 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:50,472 INFO L175 Difference]: Start difference. First operand has 93 places, 48 transitions, 554 flow. Second operand 22 states and 2031 transitions. [2022-12-13 16:54:50,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 636 transitions, 9612 flow [2022-12-13 16:54:50,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 636 transitions, 9067 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:50,521 INFO L231 Difference]: Finished difference. Result has 124 places, 59 transitions, 728 flow [2022-12-13 16:54:50,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=728, PETRI_PLACES=124, PETRI_TRANSITIONS=59} [2022-12-13 16:54:50,522 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2022-12-13 16:54:50,522 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 59 transitions, 728 flow [2022-12-13 16:54:50,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.17391304347827) internal successors, (2005), 23 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:50,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:50,523 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:50,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:50,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:54:50,724 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:54:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1908131861, now seen corresponding path program 6 times [2022-12-13 16:54:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244943286] [2022-12-13 16:54:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244943286] [2022-12-13 16:54:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244943286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683170137] [2022-12-13 16:54:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:54:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:53,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:53,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:53,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:54:54,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-13 16:54:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-13 16:54:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:54,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:55,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683170137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:55,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:55,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 16:54:55,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888084867] [2022-12-13 16:54:55,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 16:54:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 16:54:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 16:54:56,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2022-12-13 16:54:56,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 59 transitions, 728 flow. Second operand has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:56,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:56,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2022-12-13 16:54:56,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:31,747 INFO L130 PetriNetUnfolder]: 6510/20606 cut-off events. [2022-12-13 16:55:31,747 INFO L131 PetriNetUnfolder]: For 815463/815463 co-relation queries the response was YES. [2022-12-13 16:55:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166620 conditions, 20606 events. 6510/20606 cut-off events. For 815463/815463 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 201503 event pairs, 2026 based on Foata normal form. 1/20607 useless extension candidates. Maximal degree in co-relation 166570. Up to 6000 conditions per place. [2022-12-13 16:55:31,953 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 1653 selfloop transitions, 521 changer transitions 1/2175 dead transitions. [2022-12-13 16:55:31,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2175 transitions, 31062 flow [2022-12-13 16:55:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-12-13 16:55:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2022-12-13 16:55:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 24272 transitions. [2022-12-13 16:55:31,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46720049276255005 [2022-12-13 16:55:31,972 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 24272 transitions. [2022-12-13 16:55:31,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 24272 transitions. [2022-12-13 16:55:31,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:31,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 24272 transitions. [2022-12-13 16:55:32,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 89.23529411764706) internal successors, (24272), 272 states have internal predecessors, (24272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:32,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 191.0) internal successors, (52143), 273 states have internal predecessors, (52143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:32,042 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 191.0) internal successors, (52143), 273 states have internal predecessors, (52143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:32,042 INFO L175 Difference]: Start difference. First operand has 124 places, 59 transitions, 728 flow. Second operand 272 states and 24272 transitions. [2022-12-13 16:55:32,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2175 transitions, 31062 flow [2022-12-13 16:55:38,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2175 transitions, 31026 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 16:55:38,901 INFO L231 Difference]: Finished difference. Result has 387 places, 638 transitions, 3059 flow [2022-12-13 16:55:38,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=3059, PETRI_PLACES=387, PETRI_TRANSITIONS=638} [2022-12-13 16:55:38,902 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2022-12-13 16:55:38,902 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 638 transitions, 3059 flow [2022-12-13 16:55:38,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:38,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:38,903 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:38,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:55:39,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:39,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:55:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1846642183, now seen corresponding path program 7 times [2022-12-13 16:55:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980015805] [2022-12-13 16:55:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980015805] [2022-12-13 16:55:41,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980015805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244634140] [2022-12-13 16:55:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:55:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:41,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:41,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:55:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-13 16:55:41,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:41,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244634140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:42,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:42,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 16:55:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271480685] [2022-12-13 16:55:42,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:42,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 16:55:42,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 16:55:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 16:55:43,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2022-12-13 16:55:43,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 638 transitions, 3059 flow. Second operand has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:43,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:43,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2022-12-13 16:55:43,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:38,422 INFO L130 PetriNetUnfolder]: 13472/42873 cut-off events. [2022-12-13 16:56:38,422 INFO L131 PetriNetUnfolder]: For 1667443/1667443 co-relation queries the response was YES. [2022-12-13 16:56:38,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357645 conditions, 42873 events. 13472/42873 cut-off events. For 1667443/1667443 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 479543 event pairs, 4416 based on Foata normal form. 1/42874 useless extension candidates. Maximal degree in co-relation 357593. Up to 20095 conditions per place. [2022-12-13 16:56:38,782 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 3224 selfloop transitions, 930 changer transitions 1/4155 dead transitions. [2022-12-13 16:56:38,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4155 transitions, 52968 flow [2022-12-13 16:56:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2022-12-13 16:56:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2022-12-13 16:56:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 33595 transitions. [2022-12-13 16:56:38,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4653175988254522 [2022-12-13 16:56:38,807 INFO L72 ComplementDD]: Start complementDD. Operand 378 states and 33595 transitions. [2022-12-13 16:56:38,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 378 states and 33595 transitions. [2022-12-13 16:56:38,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:38,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 378 states and 33595 transitions. [2022-12-13 16:56:38,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 379 states, 378 states have (on average 88.87566137566138) internal successors, (33595), 378 states have internal predecessors, (33595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:38,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 379 states, 379 states have (on average 191.0) internal successors, (72389), 379 states have internal predecessors, (72389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:38,891 INFO L81 ComplementDD]: Finished complementDD. Result has 379 states, 379 states have (on average 191.0) internal successors, (72389), 379 states have internal predecessors, (72389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:38,891 INFO L175 Difference]: Start difference. First operand has 387 places, 638 transitions, 3059 flow. Second operand 378 states and 33595 transitions. [2022-12-13 16:56:38,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4155 transitions, 52968 flow [2022-12-13 16:56:45,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 4155 transitions, 52968 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:56:45,172 INFO L231 Difference]: Finished difference. Result has 838 places, 1539 transitions, 9601 flow [2022-12-13 16:56:45,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=378, PETRI_FLOW=9601, PETRI_PLACES=838, PETRI_TRANSITIONS=1539} [2022-12-13 16:56:45,173 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 816 predicate places. [2022-12-13 16:56:45,173 INFO L495 AbstractCegarLoop]: Abstraction has has 838 places, 1539 transitions, 9601 flow [2022-12-13 16:56:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:45,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:45,174 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:45,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:56:45,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:56:45,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:56:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1670990983, now seen corresponding path program 8 times [2022-12-13 16:56:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019502987] [2022-12-13 16:56:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:47,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019502987] [2022-12-13 16:56:47,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019502987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873418922] [2022-12-13 16:56:47,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:56:47,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:47,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:47,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:47,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:56:48,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:56:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:56:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-13 16:56:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:48,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:48,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873418922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:48,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:48,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 16:56:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415503167] [2022-12-13 16:56:48,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:48,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 16:56:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 16:56:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 16:56:49,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2022-12-13 16:56:49,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 1539 transitions, 9601 flow. Second operand has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:49,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:49,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2022-12-13 16:56:49,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:07,832 INFO L130 PetriNetUnfolder]: 22509/71378 cut-off events. [2022-12-13 16:58:07,832 INFO L131 PetriNetUnfolder]: For 2834504/2834504 co-relation queries the response was YES. [2022-12-13 16:58:09,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625007 conditions, 71378 events. 22509/71378 cut-off events. For 2834504/2834504 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 871186 event pairs, 7357 based on Foata normal form. 1/71379 useless extension candidates. Maximal degree in co-relation 624880. Up to 39458 conditions per place. [2022-12-13 16:58:09,286 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 3984 selfloop transitions, 1422 changer transitions 1/5407 dead transitions. [2022-12-13 16:58:09,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1224 places, 5407 transitions, 66904 flow [2022-12-13 16:58:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2022-12-13 16:58:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2022-12-13 16:58:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 34412 transitions. [2022-12-13 16:58:09,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.465549197072392 [2022-12-13 16:58:09,323 INFO L72 ComplementDD]: Start complementDD. Operand 387 states and 34412 transitions. [2022-12-13 16:58:09,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 34412 transitions. [2022-12-13 16:58:09,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:09,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 387 states and 34412 transitions. [2022-12-13 16:58:09,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 388 states, 387 states have (on average 88.91989664082688) internal successors, (34412), 387 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:09,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 388 states, 388 states have (on average 191.0) internal successors, (74108), 388 states have internal predecessors, (74108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:09,427 INFO L81 ComplementDD]: Finished complementDD. Result has 388 states, 388 states have (on average 191.0) internal successors, (74108), 388 states have internal predecessors, (74108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:09,427 INFO L175 Difference]: Start difference. First operand has 838 places, 1539 transitions, 9601 flow. Second operand 387 states and 34412 transitions. [2022-12-13 16:58:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1224 places, 5407 transitions, 66904 flow [2022-12-13 16:58:27,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1221 places, 5407 transitions, 65243 flow, removed 826 selfloop flow, removed 3 redundant places. [2022-12-13 16:58:27,598 INFO L231 Difference]: Finished difference. Result has 1483 places, 2801 transitions, 22177 flow [2022-12-13 16:58:27,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=387, PETRI_FLOW=22177, PETRI_PLACES=1483, PETRI_TRANSITIONS=2801} [2022-12-13 16:58:27,599 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 1461 predicate places. [2022-12-13 16:58:27,599 INFO L495 AbstractCegarLoop]: Abstraction has has 1483 places, 2801 transitions, 22177 flow [2022-12-13 16:58:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:27,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:27,600 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:27,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:58:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:58:27,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 16:58:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2031181445, now seen corresponding path program 9 times [2022-12-13 16:58:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510188629] [2022-12-13 16:58:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510188629] [2022-12-13 16:58:29,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510188629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437887965] [2022-12-13 16:58:29,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:58:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:29,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:29,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:58:30,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-13 16:58:30,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:30,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-13 16:58:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:30,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:31,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437887965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:31,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:31,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 16:58:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343736650] [2022-12-13 16:58:31,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:31,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 16:58:31,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 16:58:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 16:58:31,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2022-12-13 16:58:32,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:32,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:32,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2022-12-13 16:58:32,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:57,191 INFO L130 PetriNetUnfolder]: 33866/106841 cut-off events. [2022-12-13 17:00:57,191 INFO L131 PetriNetUnfolder]: For 4404125/4404125 co-relation queries the response was YES. [2022-12-13 17:01:03,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980909 conditions, 106841 events. 33866/106841 cut-off events. For 4404125/4404125 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 1392787 event pairs, 10899 based on Foata normal form. 1/106842 useless extension candidates. Maximal degree in co-relation 980519. Up to 50574 conditions per place. [2022-12-13 17:01:03,650 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 4151 selfloop transitions, 2595 changer transitions 1/6747 dead transitions. [2022-12-13 17:01:03,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1843 places, 6747 transitions, 84221 flow [2022-12-13 17:01:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2022-12-13 17:01:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2022-12-13 17:01:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 32099 transitions. [2022-12-13 17:01:03,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46553349480065553 [2022-12-13 17:01:03,670 INFO L72 ComplementDD]: Start complementDD. Operand 361 states and 32099 transitions. [2022-12-13 17:01:03,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 32099 transitions. [2022-12-13 17:01:03,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:01:03,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 361 states and 32099 transitions. [2022-12-13 17:01:03,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 362 states, 361 states have (on average 88.91689750692521) internal successors, (32099), 361 states have internal predecessors, (32099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:03,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 362 states, 362 states have (on average 191.0) internal successors, (69142), 362 states have internal predecessors, (69142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:03,729 INFO L81 ComplementDD]: Finished complementDD. Result has 362 states, 362 states have (on average 191.0) internal successors, (69142), 362 states have internal predecessors, (69142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:03,730 INFO L175 Difference]: Start difference. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand 361 states and 32099 transitions. [2022-12-13 17:01:03,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1843 places, 6747 transitions, 84221 flow [2022-12-13 17:01:52,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1836 places, 6747 transitions, 82620 flow, removed 790 selfloop flow, removed 7 redundant places. [2022-12-13 17:01:52,828 INFO L231 Difference]: Finished difference. Result has 2103 places, 4150 transitions, 42369 flow [2022-12-13 17:01:52,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=20576, PETRI_DIFFERENCE_MINUEND_PLACES=1476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=361, PETRI_FLOW=42369, PETRI_PLACES=2103, PETRI_TRANSITIONS=4150} [2022-12-13 17:01:52,830 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 2081 predicate places. [2022-12-13 17:01:52,830 INFO L495 AbstractCegarLoop]: Abstraction has has 2103 places, 4150 transitions, 42369 flow [2022-12-13 17:01:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:52,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:01:52,831 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:01:52,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:01:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:01:53,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 17:01:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:01:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash 78342867, now seen corresponding path program 10 times [2022-12-13 17:01:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:01:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959363160] [2022-12-13 17:01:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:01:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:01:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:01:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:01:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959363160] [2022-12-13 17:01:55,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959363160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:01:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583968557] [2022-12-13 17:01:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:01:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:01:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:01:55,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:01:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58c28da6-a9ab-4342-b717-fa4e1f54efe7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:01:57,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:01:57,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:01:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-13 17:01:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:01:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:57,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:01:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:57,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583968557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:01:57,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:01:57,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 17:01:57,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040835889] [2022-12-13 17:01:57,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:01:57,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:01:57,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:01:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:01:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:01:58,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 191 [2022-12-13 17:01:58,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2103 places, 4150 transitions, 42369 flow. Second operand has 63 states, 63 states have (on average 85.34920634920636) internal successors, (5377), 63 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:58,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:01:58,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 191 [2022-12-13 17:01:58,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand