./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_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_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/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_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/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_9ae2123e-a38d-4d31-9522-c69bed5940ac/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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- 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 17:37:04,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:04,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:04,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:04,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:04,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:04,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:04,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:04,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:04,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:04,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:04,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:04,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:04,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:04,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:04,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:04,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:04,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:04,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:04,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:04,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:04,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:04,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:04,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:04,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:04,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:04,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:04,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:04,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:04,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:04,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:04,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:04,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:04,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:04,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:04,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:04,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:04,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:04,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:04,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:04,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:04,697 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:37:04,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:04,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:04,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:04,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:04,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:04,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:04,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:04,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:04,752 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:04,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:04,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:04,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:04,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:04,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:04,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:37:04,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:04,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:37:04,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:04,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:37:04,756 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:04,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:37:04,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:04,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:04,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:04,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:04,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:04,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:04,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:37:04,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:37:04,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:37:04,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:04,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:37:04,762 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:04,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:04,763 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_9ae2123e-a38d-4d31-9522-c69bed5940ac/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2022-11-25 17:37:05,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:05,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:05,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:05,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:05,155 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:05,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-25 17:37:08,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:37:08,796 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:37:08,797 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-25 17:37:08,814 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/data/9c099596f/18fcfdc9f8cc45fab2502649968669b3/FLAGb6087da52 [2022-11-25 17:37:08,832 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/data/9c099596f/18fcfdc9f8cc45fab2502649968669b3 [2022-11-25 17:37:08,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:37:08,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:37:08,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:08,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:37:08,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:37:08,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:08" (1/1) ... [2022-11-25 17:37:08,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32545d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:08, skipping insertion in model container [2022-11-25 17:37:08,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:08" (1/1) ... [2022-11-25 17:37:08,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:37:08,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:37:09,308 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_9ae2123e-a38d-4d31-9522-c69bed5940ac/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-25 17:37:09,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:09,355 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:37:09,394 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_9ae2123e-a38d-4d31-9522-c69bed5940ac/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-25 17:37:09,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:09,461 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:37:09,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09 WrapperNode [2022-11-25 17:37:09,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:09,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:09,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:37:09,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:37:09,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,532 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 17:37:09,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:09,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:37:09,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:37:09,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:37:09,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:37:09,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:37:09,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:37:09,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:37:09,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (1/1) ... [2022-11-25 17:37:09,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:09,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:37:09,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:37:09,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:37:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:37:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:37:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:37:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:37:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:37:09,666 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:37:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:37:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:37:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:37:09,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:37:09,669 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 17:37:09,918 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:37:09,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:37:10,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:37:10,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:37:10,311 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 17:37:10,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:10 BoogieIcfgContainer [2022-11-25 17:37:10,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:37:10,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:37:10,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:37:10,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:37:10,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:37:08" (1/3) ... [2022-11-25 17:37:10,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a9bc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:10, skipping insertion in model container [2022-11-25 17:37:10,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:09" (2/3) ... [2022-11-25 17:37:10,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a9bc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:10, skipping insertion in model container [2022-11-25 17:37:10,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:10" (3/3) ... [2022-11-25 17:37:10,325 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2022-11-25 17:37:10,361 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:37:10,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:37:10,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:37:10,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:37:10,488 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:37:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 121 transitions, 250 flow [2022-11-25 17:37:10,610 INFO L130 PetriNetUnfolder]: 17/159 cut-off events. [2022-11-25 17:37:10,611 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:37:10,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 382 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-11-25 17:37:10,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 121 transitions, 250 flow [2022-11-25 17:37:10,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 116 transitions, 237 flow [2022-11-25 17:37:10,639 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:10,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 116 transitions, 237 flow [2022-11-25 17:37:10,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 116 transitions, 237 flow [2022-11-25 17:37:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 116 transitions, 237 flow [2022-11-25 17:37:10,744 INFO L130 PetriNetUnfolder]: 16/154 cut-off events. [2022-11-25 17:37:10,745 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:10,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 16/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 361 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-11-25 17:37:10,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2022-11-25 17:37:15,366 INFO L134 LiptonReduction]: Checked pairs total: 4741 [2022-11-25 17:37:15,366 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-11-25 17:37:15,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:15,393 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;@2fe0efc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:15,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:37:15,400 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2022-11-25 17:37:15,400 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:15,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:15,401 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:37:15,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:15,409 INFO L85 PathProgramCache]: Analyzing trace with hash 14287296, now seen corresponding path program 1 times [2022-11-25 17:37:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:15,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111778332] [2022-11-25 17:37:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:15,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:15,790 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 17:37:15,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:15,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111778332] [2022-11-25 17:37:15,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111778332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:15,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:15,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555825468] [2022-11-25 17:37:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:15,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:15,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:15,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2022-11-25 17:37:15,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 17:37:15,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:15,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2022-11-25 17:37:15,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:16,040 INFO L130 PetriNetUnfolder]: 80/188 cut-off events. [2022-11-25 17:37:16,040 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:16,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 626 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2022-11-25 17:37:16,043 INFO L137 encePairwiseOnDemand]: 215/228 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2022-11-25 17:37:16,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2022-11-25 17:37:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2022-11-25 17:37:16,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5219298245614035 [2022-11-25 17:37:16,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2022-11-25 17:37:16,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2022-11-25 17:37:16,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:16,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2022-11-25 17:37:16,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 17:37:16,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 17:37:16,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 17:37:16,101 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 71 flow. Second operand 3 states and 357 transitions. [2022-11-25 17:37:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2022-11-25 17:37:16,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:16,108 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2022-11-25 17:37:16,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2022-11-25 17:37:16,114 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2022-11-25 17:37:16,115 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2022-11-25 17:37:16,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 17:37:16,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:16,116 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:37:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:37:16,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 830335439, now seen corresponding path program 1 times [2022-11-25 17:37:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123540614] [2022-11-25 17:37:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:16,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:37:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:16,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:37:16,260 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:37:16,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 17:37:16,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 17:37:16,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:37:16,267 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:37:16,270 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:37:16,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:37:16,297 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:37:16,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,365 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-11-25 17:37:16,366 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:37:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 779 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2022-11-25 17:37:16,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,377 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:16,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,377 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 156 transitions, 330 flow [2022-11-25 17:37:16,418 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-11-25 17:37:16,418 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:37:16,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 779 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2022-11-25 17:37:16,430 INFO L119 LiptonReduction]: Number of co-enabled transitions 8712 [2022-11-25 17:37:21,058 INFO L134 LiptonReduction]: Checked pairs total: 15833 [2022-11-25 17:37:21,058 INFO L136 LiptonReduction]: Total number of compositions: 134 [2022-11-25 17:37:21,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:21,062 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;@2fe0efc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:21,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:37:21,065 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 17:37:21,065 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:21,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:21,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:37:21,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash 24285701, now seen corresponding path program 1 times [2022-11-25 17:37:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:21,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771364089] [2022-11-25 17:37:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:21,112 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 17:37:21,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:21,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771364089] [2022-11-25 17:37:21,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771364089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:21,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:21,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168484388] [2022-11-25 17:37:21,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:21,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:21,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:21,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 290 [2022-11-25 17:37:21,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 17:37:21,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:21,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 290 [2022-11-25 17:37:21,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:21,576 INFO L130 PetriNetUnfolder]: 1642/2913 cut-off events. [2022-11-25 17:37:21,576 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:37:21,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17182 event pairs, 752 based on Foata normal form. 428/3025 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2022-11-25 17:37:21,590 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2022-11-25 17:37:21,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2022-11-25 17:37:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2022-11-25 17:37:21,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2022-11-25 17:37:21,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2022-11-25 17:37:21,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2022-11-25 17:37:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:21,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2022-11-25 17:37:21,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 17:37:21,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,600 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 130 flow. Second operand 3 states and 454 transitions. [2022-11-25 17:37:21,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2022-11-25 17:37:21,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:21,603 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2022-11-25 17:37:21,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-11-25 17:37:21,604 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-11-25 17:37:21,604 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2022-11-25 17:37:21,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 17:37:21,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:21,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:37:21,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1953817922, now seen corresponding path program 1 times [2022-11-25 17:37:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:21,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400431026] [2022-11-25 17:37:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:21,670 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 17:37:21,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:21,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400431026] [2022-11-25 17:37:21,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400431026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:21,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038017959] [2022-11-25 17:37:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:21,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:21,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:37:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:37:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:21,867 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 17:37:21,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:21,908 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 17:37:21,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038017959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:21,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:21,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:37:21,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434490378] [2022-11-25 17:37:21,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:21,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:37:21,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:37:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:37:21,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 290 [2022-11-25 17:37:21,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 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 17:37:21,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:21,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 290 [2022-11-25 17:37:21,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:22,168 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2022-11-25 17:37:22,169 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-11-25 17:37:22,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3906 event pairs, 0 based on Foata normal form. 90/859 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2022-11-25 17:37:22,179 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-11-25 17:37:22,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2022-11-25 17:37:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:37:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:37:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2022-11-25 17:37:22,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2022-11-25 17:37:22,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2022-11-25 17:37:22,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2022-11-25 17:37:22,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:22,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2022-11-25 17:37:22,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 17:37:22,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 17:37:22,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 17:37:22,196 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 695 transitions. [2022-11-25 17:37:22,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2022-11-25 17:37:22,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:22,203 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-11-25 17:37:22,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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 17:37:22,206 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-11-25 17:37:22,206 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-11-25 17:37:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 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 17:37:22,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:22,207 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:37:22,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:22,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:22,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1410361903, now seen corresponding path program 1 times [2022-11-25 17:37:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:22,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469330398] [2022-11-25 17:37:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:22,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:37:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:22,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:37:22,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:37:22,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 17:37:22,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 17:37:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:37:22,484 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:37:22,485 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:37:22,485 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:37:22,522 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:37:22,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,624 INFO L130 PetriNetUnfolder]: 50/388 cut-off events. [2022-11-25 17:37:22,624 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:37:22,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 388 events. 50/388 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1354 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-11-25 17:37:22,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,630 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:22,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 191 transitions, 412 flow [2022-11-25 17:37:22,679 INFO L130 PetriNetUnfolder]: 50/388 cut-off events. [2022-11-25 17:37:22,679 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:37:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 388 events. 50/388 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1354 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-11-25 17:37:22,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 16632 [2022-11-25 17:37:28,323 INFO L134 LiptonReduction]: Checked pairs total: 36163 [2022-11-25 17:37:28,324 INFO L136 LiptonReduction]: Total number of compositions: 161 [2022-11-25 17:37:28,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:28,327 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;@2fe0efc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:28,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:37:28,329 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-11-25 17:37:28,330 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:28,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:28,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:37:28,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash 36222575, now seen corresponding path program 1 times [2022-11-25 17:37:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133258406] [2022-11-25 17:37:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:28,380 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 17:37:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:28,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133258406] [2022-11-25 17:37:28,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133258406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:28,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:28,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472357667] [2022-11-25 17:37:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:28,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2022-11-25 17:37:28,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:28,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:28,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2022-11-25 17:37:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:34,724 INFO L130 PetriNetUnfolder]: 32280/46608 cut-off events. [2022-11-25 17:37:34,724 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2022-11-25 17:37:34,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 302914 event pairs, 21006 based on Foata normal form. 5103/47987 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2022-11-25 17:37:34,905 INFO L137 encePairwiseOnDemand]: 328/352 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2022-11-25 17:37:34,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2022-11-25 17:37:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-25 17:37:34,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2022-11-25 17:37:34,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-25 17:37:34,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-25 17:37:34,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:34,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-25 17:37:34,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 17:37:34,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 17:37:34,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 17:37:34,915 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 180 flow. Second operand 3 states and 554 transitions. [2022-11-25 17:37:34,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2022-11-25 17:37:34,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:34,920 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2022-11-25 17:37:34,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-11-25 17:37:34,922 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-11-25 17:37:34,922 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2022-11-25 17:37:34,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:34,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:34,923 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:34,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:37:34,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 611239862, now seen corresponding path program 1 times [2022-11-25 17:37:34,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:34,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544481189] [2022-11-25 17:37:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:34,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:34,996 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 17:37:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544481189] [2022-11-25 17:37:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544481189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93383075] [2022-11-25 17:37:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:35,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:35,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:37:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:37:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:35,151 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 17:37:35,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:35,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93383075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:35,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:35,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:37:35,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520744098] [2022-11-25 17:37:35,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:35,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:37:35,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:35,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:37:35,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:37:35,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2022-11-25 17:37:35,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 17:37:35,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:35,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2022-11-25 17:37:35,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:36,927 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2022-11-25 17:37:36,928 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2022-11-25 17:37:36,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81326 event pairs, 0 based on Foata normal form. 1098/13284 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2022-11-25 17:37:37,013 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-11-25 17:37:37,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2022-11-25 17:37:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:37:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:37:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1030 transitions. [2022-11-25 17:37:37,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876893939393939 [2022-11-25 17:37:37,019 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1030 transitions. [2022-11-25 17:37:37,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1030 transitions. [2022-11-25 17:37:37,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:37,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1030 transitions. [2022-11-25 17:37:37,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.66666666666666) internal successors, (1030), 6 states have internal predecessors, (1030), 0 states have call successors, (0), 0 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 17:37:37,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 17:37:37,033 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 17:37:37,033 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 1030 transitions. [2022-11-25 17:37:37,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2022-11-25 17:37:37,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:37,045 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-11-25 17:37:37,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, 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 17:37:37,047 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-11-25 17:37:37,047 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-11-25 17:37:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 17:37:37,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:37,048 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:37:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ae2123e-a38d-4d31-9522-c69bed5940ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:37:37,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1001492734, now seen corresponding path program 1 times [2022-11-25 17:37:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:37,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546061164] [2022-11-25 17:37:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:37,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:37:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:37,352 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:37:37,355 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:37:37,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 17:37:37,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 17:37:37,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:37:37,356 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:37:37,357 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:37:37,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:37:37,418 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 17:37:37,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,573 INFO L130 PetriNetUnfolder]: 81/587 cut-off events. [2022-11-25 17:37:37,573 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:37:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 587 events. 81/587 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2294 event pairs, 6 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 408. Up to 32 conditions per place. [2022-11-25 17:37:37,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,586 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:37,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 226 transitions, 496 flow [2022-11-25 17:37:37,726 INFO L130 PetriNetUnfolder]: 81/587 cut-off events. [2022-11-25 17:37:37,727 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:37:37,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 587 events. 81/587 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2294 event pairs, 6 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 408. Up to 32 conditions per place. [2022-11-25 17:37:37,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 26928 [2022-11-25 17:37:43,991 INFO L134 LiptonReduction]: Checked pairs total: 61751 [2022-11-25 17:37:43,992 INFO L136 LiptonReduction]: Total number of compositions: 189 [2022-11-25 17:37:43,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:43,995 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;@2fe0efc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:43,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:37:43,998 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-11-25 17:37:43,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:43,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:43,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:37:43,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:37:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash 50064363, now seen corresponding path program 1 times [2022-11-25 17:37:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:44,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816959281] [2022-11-25 17:37:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:44,033 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 17:37:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816959281] [2022-11-25 17:37:44,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816959281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:44,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:44,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332720782] [2022-11-25 17:37:44,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:44,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:44,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 415 [2022-11-25 17:37:44,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:44,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 415 [2022-11-25 17:37:44,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand