./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/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_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/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_8c21a483-c607-46e5-bd27-5338751cac97/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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --- 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 18:13:27,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:13:27,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:13:27,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:13:27,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:13:27,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:13:27,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:13:27,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:13:27,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:13:27,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:13:27,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:13:27,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:13:27,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:13:27,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:13:27,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:13:27,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:13:27,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:13:27,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:13:27,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:13:27,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:13:27,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:13:27,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:13:27,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:13:27,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:13:27,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:13:27,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:13:27,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:13:27,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:13:27,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:13:27,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:13:27,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:13:27,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:13:27,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:13:27,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:13:27,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:13:27,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:13:27,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:13:27,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:13:27,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:13:27,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:13:27,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:13:27,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:13:27,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:13:27,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:13:27,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:13:27,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:13:27,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:13:27,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:13:27,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:13:27,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:13:27,903 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:13:27,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:13:27,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:13:27,903 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:13:27,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:13:27,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:13:27,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:13:27,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:13:27,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:13:27,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:13:27,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:13:27,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:27,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:13:27,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:13:27,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:13:27,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:13:27,906 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:13:27,907 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:13:27,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:13:27,907 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:13:27,907 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 [2022-12-13 18:13:28,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:13:28,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:13:28,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:13:28,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:13:28,109 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:13:28,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-12-13 18:13:30,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:13:30,903 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:13:30,904 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-12-13 18:13:30,916 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/data/359560360/b7f56325d9264b49a25519c610d0dc1b/FLAG2e38498bf [2022-12-13 18:13:31,266 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/data/359560360/b7f56325d9264b49a25519c610d0dc1b [2022-12-13 18:13:31,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:13:31,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:13:31,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:31,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:13:31,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:13:31,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e129191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31, skipping insertion in model container [2022-12-13 18:13:31,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:13:31,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:13:31,562 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_8c21a483-c607-46e5-bd27-5338751cac97/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-12-13 18:13:31,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:31,595 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:13:31,626 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_8c21a483-c607-46e5-bd27-5338751cac97/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-12-13 18:13:31,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:31,664 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:13:31,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31 WrapperNode [2022-12-13 18:13:31,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:31,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:31,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:13:31,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:13:31,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,704 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2022-12-13 18:13:31,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:31,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:13:31,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:13:31,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:13:31,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:13:31,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:13:31,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:13:31,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:13:31,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (1/1) ... [2022-12-13 18:13:31,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:13:31,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:13:31,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 18:13:31,784 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:13:31,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:13:31,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:13:31,785 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 18:13:31,877 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:13:31,879 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:13:32,068 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:13:32,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:13:32,075 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-12-13 18:13:32,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:32 BoogieIcfgContainer [2022-12-13 18:13:32,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:13:32,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:13:32,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:13:32,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:13:32,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:13:31" (1/3) ... [2022-12-13 18:13:32,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5edd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:32, skipping insertion in model container [2022-12-13 18:13:32,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:31" (2/3) ... [2022-12-13 18:13:32,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5edd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:32, skipping insertion in model container [2022-12-13 18:13:32,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:32" (3/3) ... [2022-12-13 18:13:32,083 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2022-12-13 18:13:32,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:13:32,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-12-13 18:13:32,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:13:32,138 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 18:13:32,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,216 INFO L130 PetriNetUnfolder]: 33/219 cut-off events. [2022-12-13 18:13:32,216 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:13:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 219 events. 33/219 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 764 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2022-12-13 18:13:32,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,227 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:13:32,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,237 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 154 transitions, 316 flow [2022-12-13 18:13:32,268 INFO L130 PetriNetUnfolder]: 33/219 cut-off events. [2022-12-13 18:13:32,268 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:13:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 219 events. 33/219 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 764 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2022-12-13 18:13:32,272 INFO L119 LiptonReduction]: Number of co-enabled transitions 6674 [2022-12-13 18:13:34,312 INFO L134 LiptonReduction]: Checked pairs total: 18784 [2022-12-13 18:13:34,312 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-12-13 18:13:34,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:13:34,332 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;@2e3b50ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:13:34,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 18:13:34,334 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 18:13:34,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:13:34,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:34,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:34,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 18:13:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash 19048, now seen corresponding path program 1 times [2022-12-13 18:13:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624256518] [2022-12-13 18:13:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:34,514 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 18:13:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:34,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624256518] [2022-12-13 18:13:34,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624256518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:34,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:34,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295670071] [2022-12-13 18:13:34,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:34,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 275 [2022-12-13 18:13:34,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:34,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 275 [2022-12-13 18:13:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:34,737 INFO L130 PetriNetUnfolder]: 272/640 cut-off events. [2022-12-13 18:13:34,737 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:13:34,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 640 events. 272/640 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3086 event pairs, 224 based on Foata normal form. 69/570 useless extension candidates. Maximal degree in co-relation 1167. Up to 514 conditions per place. [2022-12-13 18:13:34,742 INFO L137 encePairwiseOnDemand]: 253/275 looper letters, 49 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2022-12-13 18:13:34,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 236 flow [2022-12-13 18:13:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2022-12-13 18:13:34,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2022-12-13 18:13:34,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2022-12-13 18:13:34,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2022-12-13 18:13:34,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:34,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2022-12-13 18:13:34,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,772 INFO L175 Difference]: Start difference. First operand has 50 places, 66 transitions, 140 flow. Second operand 3 states and 445 transitions. [2022-12-13 18:13:34,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 236 flow [2022-12-13 18:13:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:13:34,777 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 108 flow [2022-12-13 18:13:34,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-12-13 18:13:34,783 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2022-12-13 18:13:34,783 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 108 flow [2022-12-13 18:13:34,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:34,784 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:13:34,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 18:13:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash 19047, now seen corresponding path program 1 times [2022-12-13 18:13:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:34,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124307622] [2022-12-13 18:13:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:34,898 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 18:13:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124307622] [2022-12-13 18:13:34,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124307622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:34,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247872421] [2022-12-13 18:13:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:34,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 275 [2022-12-13 18:13:34,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:34,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:34,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 275 [2022-12-13 18:13:34,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:35,076 INFO L130 PetriNetUnfolder]: 273/678 cut-off events. [2022-12-13 18:13:35,076 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:13:35,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 678 events. 273/678 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3466 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1219. Up to 549 conditions per place. [2022-12-13 18:13:35,080 INFO L137 encePairwiseOnDemand]: 270/275 looper letters, 63 selfloop transitions, 3 changer transitions 2/78 dead transitions. [2022-12-13 18:13:35,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 310 flow [2022-12-13 18:13:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2022-12-13 18:13:35,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5381818181818182 [2022-12-13 18:13:35,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2022-12-13 18:13:35,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2022-12-13 18:13:35,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:35,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2022-12-13 18:13:35,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,088 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 108 flow. Second operand 3 states and 444 transitions. [2022-12-13 18:13:35,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 310 flow [2022-12-13 18:13:35,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:13:35,092 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 119 flow [2022-12-13 18:13:35,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2022-12-13 18:13:35,093 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-12-13 18:13:35,093 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 119 flow [2022-12-13 18:13:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:35,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:13:35,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:13:35,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 18:13:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 567933250, now seen corresponding path program 1 times [2022-12-13 18:13:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:35,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727243547] [2022-12-13 18:13:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:35,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727243547] [2022-12-13 18:13:35,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727243547] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:35,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170326247] [2022-12-13 18:13:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:13:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:13:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:13:35,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 275 [2022-12-13 18:13:35,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:35,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 275 [2022-12-13 18:13:35,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:35,381 INFO L130 PetriNetUnfolder]: 257/647 cut-off events. [2022-12-13 18:13:35,382 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 18:13:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 647 events. 257/647 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3305 event pairs, 0 based on Foata normal form. 15/559 useless extension candidates. Maximal degree in co-relation 1189. Up to 467 conditions per place. [2022-12-13 18:13:35,385 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 63 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2022-12-13 18:13:35,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 317 flow [2022-12-13 18:13:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:13:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:13:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2022-12-13 18:13:35,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2022-12-13 18:13:35,388 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2022-12-13 18:13:35,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2022-12-13 18:13:35,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:35,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2022-12-13 18:13:35,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,393 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 119 flow. Second operand 4 states and 565 transitions. [2022-12-13 18:13:35,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 317 flow [2022-12-13 18:13:35,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:13:35,396 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 131 flow [2022-12-13 18:13:35,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2022-12-13 18:13:35,397 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2022-12-13 18:13:35,397 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 131 flow [2022-12-13 18:13:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:35,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:35,398 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 18:13:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:13:35,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 18:13:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 426062071, now seen corresponding path program 1 times [2022-12-13 18:13:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177796293] [2022-12-13 18:13:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:13:35,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:13:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:13:35,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:13:35,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:13:35,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-12-13 18:13:35,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-13 18:13:35,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-13 18:13:35,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-13 18:13:35,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-13 18:13:35,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-12-13 18:13:35,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-12-13 18:13:35,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-12-13 18:13:35,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-13 18:13:35,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:13:35,445 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 18:13:35,447 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:13:35,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 18:13:35,468 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:13:35,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,513 INFO L130 PetriNetUnfolder]: 57/363 cut-off events. [2022-12-13 18:13:35,513 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:13:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 363 events. 57/363 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1458 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 221. Up to 9 conditions per place. [2022-12-13 18:13:35,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:13:35,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 203 transitions, 424 flow [2022-12-13 18:13:35,555 INFO L130 PetriNetUnfolder]: 57/363 cut-off events. [2022-12-13 18:13:35,556 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:13:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 363 events. 57/363 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1458 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 221. Up to 9 conditions per place. [2022-12-13 18:13:35,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 18800 [2022-12-13 18:13:37,944 INFO L134 LiptonReduction]: Checked pairs total: 50853 [2022-12-13 18:13:37,944 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-12-13 18:13:37,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:13:37,946 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;@2e3b50ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:13:37,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 18:13:37,947 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 18:13:37,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:13:37,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:37,947 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:37,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 18:13:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 32020, now seen corresponding path program 1 times [2022-12-13 18:13:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420943400] [2022-12-13 18:13:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:37,983 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 18:13:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420943400] [2022-12-13 18:13:37,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420943400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:37,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:37,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324007084] [2022-12-13 18:13:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:38,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 357 [2022-12-13 18:13:38,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:38,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 357 [2022-12-13 18:13:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:38,873 INFO L130 PetriNetUnfolder]: 7321/12409 cut-off events. [2022-12-13 18:13:38,874 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 18:13:38,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23765 conditions, 12409 events. 7321/12409 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 88665 event pairs, 3204 based on Foata normal form. 1206/11137 useless extension candidates. Maximal degree in co-relation 2252. Up to 11241 conditions per place. [2022-12-13 18:13:38,934 INFO L137 encePairwiseOnDemand]: 327/357 looper letters, 66 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-12-13 18:13:38,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 330 flow [2022-12-13 18:13:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-12-13 18:13:38,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5508870214752568 [2022-12-13 18:13:38,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-12-13 18:13:38,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-12-13 18:13:38,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:38,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-12-13 18:13:38,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,941 INFO L175 Difference]: Start difference. First operand has 73 places, 98 transitions, 214 flow. Second operand 3 states and 590 transitions. [2022-12-13 18:13:38,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 330 flow [2022-12-13 18:13:38,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:13:38,944 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 176 flow [2022-12-13 18:13:38,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-12-13 18:13:38,945 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-12-13 18:13:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 176 flow [2022-12-13 18:13:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:38,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:13:38,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 18:13:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 32022, now seen corresponding path program 1 times [2022-12-13 18:13:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355715344] [2022-12-13 18:13:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:38,973 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 18:13:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355715344] [2022-12-13 18:13:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355715344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:38,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:38,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618294159] [2022-12-13 18:13:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:38,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 357 [2022-12-13 18:13:38,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:38,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 357 [2022-12-13 18:13:38,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:39,699 INFO L130 PetriNetUnfolder]: 6606/11121 cut-off events. [2022-12-13 18:13:39,699 INFO L131 PetriNetUnfolder]: For 428/428 co-relation queries the response was YES. [2022-12-13 18:13:39,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21929 conditions, 11121 events. 6606/11121 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 77515 event pairs, 5400 based on Foata normal form. 0/9232 useless extension candidates. Maximal degree in co-relation 21829. Up to 9043 conditions per place. [2022-12-13 18:13:39,731 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 74 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2022-12-13 18:13:39,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 378 flow [2022-12-13 18:13:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2022-12-13 18:13:39,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2022-12-13 18:13:39,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2022-12-13 18:13:39,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2022-12-13 18:13:39,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:39,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2022-12-13 18:13:39,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:39,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:39,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:39,735 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 176 flow. Second operand 3 states and 555 transitions. [2022-12-13 18:13:39,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 378 flow [2022-12-13 18:13:39,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:13:39,737 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 176 flow [2022-12-13 18:13:39,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-12-13 18:13:39,737 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2022-12-13 18:13:39,737 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 176 flow [2022-12-13 18:13:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:39,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:39,738 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:13:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:13:39,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 18:13:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -467742973, now seen corresponding path program 1 times [2022-12-13 18:13:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251322524] [2022-12-13 18:13:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:39,795 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 18:13:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251322524] [2022-12-13 18:13:39,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251322524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:13:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352255184] [2022-12-13 18:13:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:39,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:13:39,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:13:39,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:13:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:13:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:13:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:39,916 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 18:13:39,948 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 18:13:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:13:39,990 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 18:13:39,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352255184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:13:39,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:13:39,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 18:13:39,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191338635] [2022-12-13 18:13:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:13:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:13:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:39,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:13:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:13:40,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 357 [2022-12-13 18:13:40,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:40,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:40,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 357 [2022-12-13 18:13:40,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:40,803 INFO L130 PetriNetUnfolder]: 6112/10561 cut-off events. [2022-12-13 18:13:40,803 INFO L131 PetriNetUnfolder]: For 418/418 co-relation queries the response was YES. [2022-12-13 18:13:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21024 conditions, 10561 events. 6112/10561 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 74633 event pairs, 745 based on Foata normal form. 13/9209 useless extension candidates. Maximal degree in co-relation 18382. Up to 7818 conditions per place. [2022-12-13 18:13:40,844 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 112 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2022-12-13 18:13:40,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 540 flow [2022-12-13 18:13:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:13:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:13:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 915 transitions. [2022-12-13 18:13:40,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2022-12-13 18:13:40,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 915 transitions. [2022-12-13 18:13:40,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 915 transitions. [2022-12-13 18:13:40,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:40,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 915 transitions. [2022-12-13 18:13:40,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:40,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:40,853 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:40,853 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 176 flow. Second operand 5 states and 915 transitions. [2022-12-13 18:13:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 540 flow [2022-12-13 18:13:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 137 transitions, 534 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:13:40,873 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 180 flow [2022-12-13 18:13:40,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-12-13 18:13:40,873 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2022-12-13 18:13:40,873 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 180 flow [2022-12-13 18:13:40,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:40,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:40,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:13:40,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:13:41,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:13:41,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 18:13:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1608691731, now seen corresponding path program 1 times [2022-12-13 18:13:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010596168] [2022-12-13 18:13:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:41,162 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 18:13:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010596168] [2022-12-13 18:13:41,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010596168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:41,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:41,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775779789] [2022-12-13 18:13:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:41,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:41,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 357 [2022-12-13 18:13:41,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:41,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:41,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 357 [2022-12-13 18:13:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:42,154 INFO L130 PetriNetUnfolder]: 9523/15976 cut-off events. [2022-12-13 18:13:42,154 INFO L131 PetriNetUnfolder]: For 588/588 co-relation queries the response was YES. [2022-12-13 18:13:42,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32397 conditions, 15976 events. 9523/15976 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 113658 event pairs, 3935 based on Foata normal form. 0/14173 useless extension candidates. Maximal degree in co-relation 17651. Up to 7768 conditions per place. [2022-12-13 18:13:42,193 INFO L137 encePairwiseOnDemand]: 340/357 looper letters, 84 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2022-12-13 18:13:42,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 464 flow [2022-12-13 18:13:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-12-13 18:13:42,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5303454715219421 [2022-12-13 18:13:42,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-12-13 18:13:42,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-12-13 18:13:42,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:42,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-12-13 18:13:42,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:42,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:42,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:42,197 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 180 flow. Second operand 3 states and 568 transitions. [2022-12-13 18:13:42,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 464 flow [2022-12-13 18:13:42,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 18:13:42,215 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 268 flow [2022-12-13 18:13:42,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2022-12-13 18:13:42,216 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2022-12-13 18:13:42,216 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 268 flow [2022-12-13 18:13:42,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:42,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:42,217 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 18:13:42,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:13:42,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 18:13:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1858844572, now seen corresponding path program 1 times [2022-12-13 18:13:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:42,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419668671] [2022-12-13 18:13:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:13:42,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:13:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:13:42,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:13:42,235 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-12-13 18:13:42,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-12-13 18:13:42,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-12-13 18:13:42,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-12-13 18:13:42,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-12-13 18:13:42,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:13:42,236 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 18:13:42,236 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:13:42,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 18:13:42,256 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:13:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,304 INFO L130 PetriNetUnfolder]: 86/550 cut-off events. [2022-12-13 18:13:42,304 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 18:13:42,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 550 events. 86/550 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2308 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2022-12-13 18:13:42,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:13:42,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 252 transitions, 534 flow [2022-12-13 18:13:42,352 INFO L130 PetriNetUnfolder]: 86/550 cut-off events. [2022-12-13 18:13:42,352 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 18:13:42,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 550 events. 86/550 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2308 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2022-12-13 18:13:42,368 INFO L119 LiptonReduction]: Number of co-enabled transitions 35250 [2022-12-13 18:13:44,831 INFO L134 LiptonReduction]: Checked pairs total: 103960 [2022-12-13 18:13:44,831 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-12-13 18:13:44,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:13:44,833 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;@2e3b50ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:13:44,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-13 18:13:44,834 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 18:13:44,834 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:13:44,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:44,835 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:44,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 18:13:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash 47718, now seen corresponding path program 1 times [2022-12-13 18:13:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152627031] [2022-12-13 18:13:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:44,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:44,851 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 18:13:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152627031] [2022-12-13 18:13:44,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152627031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:44,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:44,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260538173] [2022-12-13 18:13:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:44,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:44,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 442 [2022-12-13 18:13:44,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 127 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:44,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:44,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 442 [2022-12-13 18:13:44,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:56,301 INFO L130 PetriNetUnfolder]: 133357/193876 cut-off events. [2022-12-13 18:13:56,301 INFO L131 PetriNetUnfolder]: For 1910/1910 co-relation queries the response was YES. [2022-12-13 18:13:56,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375792 conditions, 193876 events. 133357/193876 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 4558. Compared 1573394 event pairs, 108665 based on Foata normal form. 28703/187949 useless extension candidates. Maximal degree in co-relation 43873. Up to 159828 conditions per place. [2022-12-13 18:13:57,115 INFO L137 encePairwiseOnDemand]: 403/442 looper letters, 101 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2022-12-13 18:13:57,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 498 flow [2022-12-13 18:13:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2022-12-13 18:13:57,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2022-12-13 18:13:57,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2022-12-13 18:13:57,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2022-12-13 18:13:57,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:57,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2022-12-13 18:13:57,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,129 INFO L175 Difference]: Start difference. First operand has 94 places, 127 transitions, 284 flow. Second operand 3 states and 754 transitions. [2022-12-13 18:13:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 498 flow [2022-12-13 18:13:57,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 130 transitions, 498 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:13:57,135 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 218 flow [2022-12-13 18:13:57,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2022-12-13 18:13:57,136 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 0 predicate places. [2022-12-13 18:13:57,136 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 218 flow [2022-12-13 18:13:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:57,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:13:57,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 18:13:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 47719, now seen corresponding path program 1 times [2022-12-13 18:13:57,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:57,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848947880] [2022-12-13 18:13:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:57,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:57,179 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 18:13:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848947880] [2022-12-13 18:13:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848947880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:57,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261796281] [2022-12-13 18:13:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:57,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 442 [2022-12-13 18:13:57,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:57,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 442 [2022-12-13 18:13:57,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:09,216 INFO L130 PetriNetUnfolder]: 133356/193300 cut-off events. [2022-12-13 18:14:09,216 INFO L131 PetriNetUnfolder]: For 1751/1751 co-relation queries the response was YES. [2022-12-13 18:14:09,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380750 conditions, 193300 events. 133356/193300 cut-off events. For 1751/1751 co-relation queries the response was YES. Maximal size of possible extension queue 4586. Compared 1561667 event pairs, 80666 based on Foata normal form. 0/161430 useless extension candidates. Maximal degree in co-relation 333949. Up to 180468 conditions per place. [2022-12-13 18:14:09,987 INFO L137 encePairwiseOnDemand]: 438/442 looper letters, 77 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2022-12-13 18:14:09,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 105 transitions, 404 flow [2022-12-13 18:14:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:14:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2022-12-13 18:14:09,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5113122171945701 [2022-12-13 18:14:09,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2022-12-13 18:14:09,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2022-12-13 18:14:09,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:09,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2022-12-13 18:14:09,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:09,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:09,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:09,993 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 218 flow. Second operand 3 states and 678 transitions. [2022-12-13 18:14:09,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 105 transitions, 404 flow [2022-12-13 18:14:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:14:12,636 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 226 flow [2022-12-13 18:14:12,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2022-12-13 18:14:12,637 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-12-13 18:14:12,637 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 226 flow [2022-12-13 18:14:12,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:12,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:12,637 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:14:12,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:14:12,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 18:14:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:12,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1156842098, now seen corresponding path program 1 times [2022-12-13 18:14:12,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:12,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493018942] [2022-12-13 18:14:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:12,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:12,686 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 18:14:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:12,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493018942] [2022-12-13 18:14:12,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493018942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:12,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206866218] [2022-12-13 18:14:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:12,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:12,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:12,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:12,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:14:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:14:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:12,749 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 18:14:12,782 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 18:14:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:12,818 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 18:14:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206866218] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:12,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:14:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 18:14:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651808968] [2022-12-13 18:14:12,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:14:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:14:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:14:12,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 442 [2022-12-13 18:14:12,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 196.875) internal successors, (1575), 8 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:12,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:12,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 442 [2022-12-13 18:14:12,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:14,535 INFO L130 PetriNetUnfolder]: 18445/28847 cut-off events. [2022-12-13 18:14:14,536 INFO L131 PetriNetUnfolder]: For 9552/9552 co-relation queries the response was YES. [2022-12-13 18:14:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63936 conditions, 28847 events. 18445/28847 cut-off events. For 9552/9552 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 218861 event pairs, 900 based on Foata normal form. 2352/28413 useless extension candidates. Maximal degree in co-relation 6498. Up to 17472 conditions per place. [2022-12-13 18:14:14,773 INFO L137 encePairwiseOnDemand]: 438/442 looper letters, 122 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2022-12-13 18:14:14,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 146 transitions, 575 flow [2022-12-13 18:14:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:14:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:14:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1302 transitions. [2022-12-13 18:14:14,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49095022624434387 [2022-12-13 18:14:14,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1302 transitions. [2022-12-13 18:14:14,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1302 transitions. [2022-12-13 18:14:14,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:14,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1302 transitions. [2022-12-13 18:14:14,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:14,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:14,782 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:14,783 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 226 flow. Second operand 6 states and 1302 transitions. [2022-12-13 18:14:14,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 146 transitions, 575 flow [2022-12-13 18:14:14,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 146 transitions, 567 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 18:14:14,792 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 165 flow [2022-12-13 18:14:14,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2022-12-13 18:14:14,792 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, -18 predicate places. [2022-12-13 18:14:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 165 flow [2022-12-13 18:14:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.875) internal successors, (1575), 8 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:14,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:14,793 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:14,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:14:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c21a483-c607-46e5-bd27-5338751cac97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:14,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 18:14:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1510865309, now seen corresponding path program 1 times [2022-12-13 18:14:14,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:14,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791840013] [2022-12-13 18:14:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:14,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:15,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791840013] [2022-12-13 18:14:15,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791840013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:15,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:15,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:14:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860223889] [2022-12-13 18:14:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:15,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 442 [2022-12-13 18:14:15,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:15,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:15,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 442 [2022-12-13 18:14:15,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:15,322 INFO L130 PetriNetUnfolder]: 1852/2831 cut-off events. [2022-12-13 18:14:15,323 INFO L131 PetriNetUnfolder]: For 998/998 co-relation queries the response was YES. [2022-12-13 18:14:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6316 conditions, 2831 events. 1852/2831 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14292 event pairs, 1852 based on Foata normal form. 0/2810 useless extension candidates. Maximal degree in co-relation 2956. Up to 2736 conditions per place. [2022-12-13 18:14:15,332 INFO L137 encePairwiseOnDemand]: 435/442 looper letters, 23 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 18:14:15,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 28 transitions, 135 flow [2022-12-13 18:14:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:14:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2022-12-13 18:14:15,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2022-12-13 18:14:15,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2022-12-13 18:14:15,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2022-12-13 18:14:15,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:15,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2022-12-13 18:14:15,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:15,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:15,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:15,338 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 165 flow. Second operand 3 states and 595 transitions. [2022-12-13 18:14:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 28 transitions, 135 flow [2022-12-13 18:14:15,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 28 transitions, 126 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 18:14:15,339 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 80 flow [2022-12-13 18:14:15,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2022-12-13 18:14:15,339 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, -55 predicate places. [2022-12-13 18:14:15,339 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 80 flow [2022-12-13 18:14:15,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:15,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:15,340 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 18:14:15,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:14:15,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 18:14:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2079426992, now seen corresponding path program 1 times [2022-12-13 18:14:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607243023] [2022-12-13 18:14:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:15,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:14:15,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:14:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:14:15,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:14:15,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2022-12-13 18:14:15,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2022-12-13 18:14:15,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-12-13 18:14:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 18:14:15,362 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 18:14:15,362 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:14:15,362 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 18:14:15,384 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 18:14:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,500 INFO L130 PetriNetUnfolder]: 127/825 cut-off events. [2022-12-13 18:14:15,501 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 18:14:15,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 825 events. 127/825 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3836 event pairs, 6 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 570. Up to 32 conditions per place. [2022-12-13 18:14:15,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:14:15,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 301 transitions, 646 flow [2022-12-13 18:14:15,624 INFO L130 PetriNetUnfolder]: 127/825 cut-off events. [2022-12-13 18:14:15,624 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 18:14:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 825 events. 127/825 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3836 event pairs, 6 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 570. Up to 32 conditions per place. [2022-12-13 18:14:15,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 56400 [2022-12-13 18:14:18,219 INFO L134 LiptonReduction]: Checked pairs total: 171181 [2022-12-13 18:14:18,219 INFO L136 LiptonReduction]: Total number of compositions: 224 [2022-12-13 18:14:18,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:14:18,221 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;@2e3b50ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:14:18,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 18:14:18,223 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 18:14:18,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:14:18,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:18,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:14:18,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 18:14:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 66125, now seen corresponding path program 1 times [2022-12-13 18:14:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185818187] [2022-12-13 18:14:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:18,256 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 18:14:18,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185818187] [2022-12-13 18:14:18,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185818187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:18,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:18,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:14:18,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620165321] [2022-12-13 18:14:18,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:18,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:18,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:18,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 525 [2022-12-13 18:14:18,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 156 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:18,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:18,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 525 [2022-12-13 18:14:18,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand