./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- 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-38b53e6 [2022-11-25 15:30:48,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:30:48,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:30:48,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:30:48,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:30:48,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:30:48,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:30:48,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:30:48,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:30:48,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:30:48,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:30:48,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:30:48,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:30:48,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:30:48,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:30:48,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:30:48,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:30:48,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:30:48,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:30:48,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:30:48,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:30:48,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:30:48,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:30:48,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:30:48,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:30:48,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:30:48,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:30:48,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:30:48,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:30:48,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:30:48,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:30:48,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:30:48,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:30:48,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:30:48,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:30:48,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:30:48,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:30:48,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:30:48,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:30:48,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:30:48,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:30:48,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:30:49,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:30:49,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:30:49,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:30:49,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:30:49,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:30:49,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:30:49,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:30:49,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:30:49,004 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:30:49,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:30:49,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:30:49,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:30:49,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:30:49,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:30:49,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:30:49,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:30:49,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:30:49,007 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:30:49,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:30:49,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:30:49,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:30:49,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:30:49,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:30:49,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:30:49,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:30:49,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:30:49,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:30:49,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:30:49,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:30:49,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:30:49,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:30:49,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:30:49,011 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:30:49,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:30:49,012 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_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-11-25 15:30:49,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:30:49,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:30:49,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:30:49,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:30:49,305 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:30:49,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-25 15:30:52,448 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:30:52,786 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:30:52,786 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-25 15:30:52,800 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/data/9d7955453/7cf8de852bcb41fc95d2ecc6ce6d3af1/FLAG29778782d [2022-11-25 15:30:52,827 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/data/9d7955453/7cf8de852bcb41fc95d2ecc6ce6d3af1 [2022-11-25 15:30:52,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:30:52,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:30:52,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:30:52,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:30:52,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:30:52,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:30:52" (1/1) ... [2022-11-25 15:30:52,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3611b318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:52, skipping insertion in model container [2022-11-25 15:30:52,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:30:52" (1/1) ... [2022-11-25 15:30:52,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:30:52,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:30:53,378 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_be398c46-865b-4900-b17d-3d325b7d23a2/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-25 15:30:53,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:30:53,421 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:30:53,483 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_be398c46-865b-4900-b17d-3d325b7d23a2/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-25 15:30:53,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:30:53,546 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:30:53,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53 WrapperNode [2022-11-25 15:30:53,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:30:53,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:30:53,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:30:53,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:30:53,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,612 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-25 15:30:53,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:30:53,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:30:53,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:30:53,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:30:53,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:30:53,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:30:53,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:30:53,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:30:53,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (1/1) ... [2022-11-25 15:30:53,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:30:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:53,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:30:53,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:30:53,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:30:53,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 15:30:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:30:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:30:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:30:53,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:30:53,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:30:53,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:30:53,998 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:30:54,251 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:30:54,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:30:54,259 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-25 15:30:54,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:30:54 BoogieIcfgContainer [2022-11-25 15:30:54,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:30:54,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:30:54,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:30:54,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:30:54,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:30:52" (1/3) ... [2022-11-25 15:30:54,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72acc5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:30:54, skipping insertion in model container [2022-11-25 15:30:54,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:53" (2/3) ... [2022-11-25 15:30:54,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72acc5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:30:54, skipping insertion in model container [2022-11-25 15:30:54,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:30:54" (3/3) ... [2022-11-25 15:30:54,279 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-11-25 15:30:54,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:30:54,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:30:54,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:30:54,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:30:54,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:30:54,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,559 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-25 15:30:54,560 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:54,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-25 15:30:54,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,577 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:30:54,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-11-25 15:30:54,692 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-25 15:30:54,692 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-25 15:30:54,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2022-11-25 15:30:58,549 INFO L134 LiptonReduction]: Checked pairs total: 4023 [2022-11-25 15:30:58,549 INFO L136 LiptonReduction]: Total number of compositions: 98 [2022-11-25 15:30:58,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:30:58,573 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@579473b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:30:58,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:30:58,577 INFO L130 PetriNetUnfolder]: 1/7 cut-off events. [2022-11-25 15:30:58,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:58,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:58,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:30:58,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:30:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 12569811, now seen corresponding path program 1 times [2022-11-25 15:30:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:58,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965015200] [2022-11-25 15:30:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965015200] [2022-11-25 15:30:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965015200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:58,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:58,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:30:58,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538041622] [2022-11-25 15:30:58,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:58,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:30:58,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:30:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:30:58,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 201 [2022-11-25 15:30:58,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 201 [2022-11-25 15:30:58,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:58,997 INFO L130 PetriNetUnfolder]: 63/157 cut-off events. [2022-11-25 15:30:58,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:58,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 157 events. 63/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 620 event pairs, 0 based on Foata normal form. 16/153 useless extension candidates. Maximal degree in co-relation 286. Up to 134 conditions per place. [2022-11-25 15:30:59,001 INFO L137 encePairwiseOnDemand]: 190/201 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2022-11-25 15:30:59,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 123 flow [2022-11-25 15:30:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:30:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:30:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2022-11-25 15:30:59,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5041459369817579 [2022-11-25 15:30:59,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2022-11-25 15:30:59,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2022-11-25 15:30:59,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:59,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2022-11-25 15:30:59,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:59,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:59,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:59,048 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 63 flow. Second operand 3 states and 304 transitions. [2022-11-25 15:30:59,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 123 flow [2022-11-25 15:30:59,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:30:59,053 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2022-11-25 15:30:59,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2022-11-25 15:30:59,059 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2022-11-25 15:30:59,059 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2022-11-25 15:30:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:59,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:59,060 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 15:30:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:30:59,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:30:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash -794645175, now seen corresponding path program 1 times [2022-11-25 15:30:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:59,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449054677] [2022-11-25 15:30:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:59,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:30:59,105 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:30:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:30:59,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:30:59,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:30:59,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:30:59,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:30:59,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:30:59,173 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:30:59,180 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:30:59,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 15:30:59,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:30:59,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,240 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-11-25 15:30:59,241 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:30:59,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 552 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-25 15:30:59,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,245 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:30:59,246 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-11-25 15:30:59,271 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-11-25 15:30:59,271 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:30:59,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 552 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-25 15:30:59,278 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2022-11-25 15:31:03,167 INFO L134 LiptonReduction]: Checked pairs total: 12725 [2022-11-25 15:31:03,167 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-11-25 15:31:03,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:03,173 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@579473b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:03,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:03,178 INFO L130 PetriNetUnfolder]: 1/7 cut-off events. [2022-11-25 15:31:03,178 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:03,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:03,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:31:03,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash 21487255, now seen corresponding path program 1 times [2022-11-25 15:31:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:03,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546369191] [2022-11-25 15:31:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546369191] [2022-11-25 15:31:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546369191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:03,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:03,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024163043] [2022-11-25 15:31:03,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:03,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:03,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:03,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 257 [2022-11-25 15:31:03,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:03,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:03,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 257 [2022-11-25 15:31:03,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:03,725 INFO L130 PetriNetUnfolder]: 1271/2316 cut-off events. [2022-11-25 15:31:03,725 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-25 15:31:03,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4445 conditions, 2316 events. 1271/2316 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13209 event pairs, 560 based on Foata normal form. 320/2416 useless extension candidates. Maximal degree in co-relation 423. Up to 2062 conditions per place. [2022-11-25 15:31:03,737 INFO L137 encePairwiseOnDemand]: 240/257 looper letters, 34 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2022-11-25 15:31:03,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2022-11-25 15:31:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:31:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:31:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-11-25 15:31:03,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.51621271076524 [2022-11-25 15:31:03,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-11-25 15:31:03,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-11-25 15:31:03,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:03,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-11-25 15:31:03,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:03,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:03,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:03,746 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 108 flow. Second operand 3 states and 398 transitions. [2022-11-25 15:31:03,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2022-11-25 15:31:03,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 15:31:03,749 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2022-11-25 15:31:03,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-11-25 15:31:03,750 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2022-11-25 15:31:03,750 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2022-11-25 15:31:03,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:03,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:03,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:31:03,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:31:03,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -901340764, now seen corresponding path program 1 times [2022-11-25 15:31:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:03,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215958190] [2022-11-25 15:31:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215958190] [2022-11-25 15:31:03,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215958190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:31:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003857731] [2022-11-25 15:31:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:03,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:31:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:31:03,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:31:03,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:31:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:31:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:31:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:04,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:31:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:04,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003857731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:31:04,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:31:04,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:31:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696648367] [2022-11-25 15:31:04,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:31:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:31:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:31:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:31:04,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 257 [2022-11-25 15:31:04,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:04,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:04,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 257 [2022-11-25 15:31:04,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:04,304 INFO L130 PetriNetUnfolder]: 421/832 cut-off events. [2022-11-25 15:31:04,304 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-25 15:31:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 832 events. 421/832 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4186 event pairs, 80 based on Foata normal form. 100/930 useless extension candidates. Maximal degree in co-relation 1540. Up to 502 conditions per place. [2022-11-25 15:31:04,311 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2022-11-25 15:31:04,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2022-11-25 15:31:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:31:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:31:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2022-11-25 15:31:04,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47704280155642026 [2022-11-25 15:31:04,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2022-11-25 15:31:04,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2022-11-25 15:31:04,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:04,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2022-11-25 15:31:04,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:04,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:04,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:04,323 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 613 transitions. [2022-11-25 15:31:04,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2022-11-25 15:31:04,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:31:04,326 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-11-25 15:31:04,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-11-25 15:31:04,327 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2022-11-25 15:31:04,327 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-11-25 15:31:04,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:04,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:04,328 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 15:31:04,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:31:04,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 15:31:04,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:04,535 INFO L85 PathProgramCache]: Analyzing trace with hash 919280335, now seen corresponding path program 1 times [2022-11-25 15:31:04,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753093463] [2022-11-25 15:31:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:04,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:04,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:31:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:04,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:31:04,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:31:04,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:31:04,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:31:04,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:31:04,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:31:04,591 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:31:04,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 15:31:04,622 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:31:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,679 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-11-25 15:31:04,679 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:31:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-11-25 15:31:04,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,685 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:04,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-11-25 15:31:04,722 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-11-25 15:31:04,723 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:31:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-11-25 15:31:04,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2022-11-25 15:31:09,402 INFO L134 LiptonReduction]: Checked pairs total: 26090 [2022-11-25 15:31:09,402 INFO L136 LiptonReduction]: Total number of compositions: 146 [2022-11-25 15:31:09,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:09,405 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@579473b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:09,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:09,408 INFO L130 PetriNetUnfolder]: 1/7 cut-off events. [2022-11-25 15:31:09,408 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:09,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:09,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:31:09,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash 32184201, now seen corresponding path program 1 times [2022-11-25 15:31:09,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200446139] [2022-11-25 15:31:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:09,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200446139] [2022-11-25 15:31:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200446139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:09,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528874420] [2022-11-25 15:31:09,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:09,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 315 [2022-11-25 15:31:09,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:09,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:09,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 315 [2022-11-25 15:31:09,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:12,836 INFO L130 PetriNetUnfolder]: 17895/26564 cut-off events. [2022-11-25 15:31:12,836 INFO L131 PetriNetUnfolder]: For 588/588 co-relation queries the response was YES. [2022-11-25 15:31:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52163 conditions, 26564 events. 17895/26564 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 172857 event pairs, 17081 based on Foata normal form. 4496/29023 useless extension candidates. Maximal degree in co-relation 24545. Up to 25159 conditions per place. [2022-11-25 15:31:12,987 INFO L137 encePairwiseOnDemand]: 292/315 looper letters, 42 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2022-11-25 15:31:12,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 225 flow [2022-11-25 15:31:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:31:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:31:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-11-25 15:31:12,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2022-11-25 15:31:12,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-11-25 15:31:12,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-11-25 15:31:12,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:12,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-11-25 15:31:12,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:12,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:12,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:12,994 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 153 flow. Second operand 3 states and 490 transitions. [2022-11-25 15:31:12,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 225 flow [2022-11-25 15:31:12,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 15:31:12,998 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 115 flow [2022-11-25 15:31:12,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-11-25 15:31:13,002 INFO L288 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2022-11-25 15:31:13,002 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 115 flow [2022-11-25 15:31:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:13,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:13,003 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:31:13,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:31:13,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2016531101, now seen corresponding path program 1 times [2022-11-25 15:31:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:13,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681831528] [2022-11-25 15:31:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:13,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:13,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681831528] [2022-11-25 15:31:13,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681831528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:31:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609635817] [2022-11-25 15:31:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:13,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:31:13,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:31:13,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:31:13,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:31:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:31:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:31:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:13,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:31:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609635817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:31:13,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:31:13,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:31:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446962506] [2022-11-25 15:31:13,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:31:13,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:31:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:31:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:31:13,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 315 [2022-11-25 15:31:13,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:13,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:13,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 315 [2022-11-25 15:31:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:14,687 INFO L130 PetriNetUnfolder]: 6205/10135 cut-off events. [2022-11-25 15:31:14,687 INFO L131 PetriNetUnfolder]: For 1008/1008 co-relation queries the response was YES. [2022-11-25 15:31:14,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21104 conditions, 10135 events. 6205/10135 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 67621 event pairs, 0 based on Foata normal form. 909/11044 useless extension candidates. Maximal degree in co-relation 2406. Up to 5958 conditions per place. [2022-11-25 15:31:14,752 INFO L137 encePairwiseOnDemand]: 312/315 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2022-11-25 15:31:14,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2022-11-25 15:31:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:31:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:31:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 917 transitions. [2022-11-25 15:31:14,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2022-11-25 15:31:14,756 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 917 transitions. [2022-11-25 15:31:14,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 917 transitions. [2022-11-25 15:31:14,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:14,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 917 transitions. [2022-11-25 15:31:14,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.83333333333334) internal successors, (917), 6 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:14,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:14,764 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:14,764 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 115 flow. Second operand 6 states and 917 transitions. [2022-11-25 15:31:14,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2022-11-25 15:31:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:31:14,772 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-11-25 15:31:14,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-11-25 15:31:14,774 INFO L288 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2022-11-25 15:31:14,774 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-11-25 15:31:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:14,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:14,775 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 15:31:14,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:31:14,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be398c46-865b-4900-b17d-3d325b7d23a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:31:14,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1661407687, now seen corresponding path program 1 times [2022-11-25 15:31:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454438919] [2022-11-25 15:31:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:15,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:31:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:15,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:31:15,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:31:15,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:31:15,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:31:15,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:31:15,043 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:31:15,044 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:31:15,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 15:31:15,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:31:15,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,134 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-11-25 15:31:15,134 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:31:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-11-25 15:31:15,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,141 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:15,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-11-25 15:31:15,187 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-11-25 15:31:15,187 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:31:15,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-11-25 15:31:15,207 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2022-11-25 15:31:19,814 INFO L134 LiptonReduction]: Checked pairs total: 46349 [2022-11-25 15:31:19,815 INFO L136 LiptonReduction]: Total number of compositions: 173 [2022-11-25 15:31:19,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:19,825 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@579473b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:19,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:19,827 INFO L130 PetriNetUnfolder]: 1/7 cut-off events. [2022-11-25 15:31:19,827 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:19,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:19,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:31:19,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash 44736135, now seen corresponding path program 1 times [2022-11-25 15:31:19,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:19,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122622379] [2022-11-25 15:31:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:19,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122622379] [2022-11-25 15:31:19,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122622379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:19,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716827825] [2022-11-25 15:31:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:19,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:19,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 375 [2022-11-25 15:31:19,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:19,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:19,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 375 [2022-11-25 15:31:19,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand