./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a --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 3fef2534d7e571caae7ed965d7471ed1f22fea3d397b160035401f5a41da921e --- 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-b5237d8 [2022-11-21 16:57:34,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:57:34,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:57:34,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:57:34,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:57:34,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:57:34,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:57:34,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:57:34,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:57:34,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:57:34,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:57:34,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:57:34,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:57:34,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:57:34,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:57:34,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:57:34,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:57:34,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:57:34,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:57:34,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:57:34,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:57:34,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:57:34,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:57:34,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:57:34,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:57:34,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:57:34,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:57:34,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:57:34,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:57:34,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:57:34,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:57:34,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:57:34,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:57:34,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:57:34,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:57:34,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:57:34,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:57:34,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:57:34,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:57:34,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:57:34,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:57:34,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:57:35,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:57:35,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:57:35,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:57:35,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:57:35,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:57:35,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:57:35,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:57:35,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:57:35,016 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:57:35,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:57:35,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:57:35,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:57:35,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:57:35,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:57:35,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:57:35,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:57:35,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:57:35,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:57:35,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:57:35,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:57:35,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:57:35,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:57:35,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:57:35,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:57:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:57:35,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:57:35,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:57:35,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:57:35,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:57:35,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:57:35,024 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:57:35,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:57:35,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:57:35,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fef2534d7e571caae7ed965d7471ed1f22fea3d397b160035401f5a41da921e [2022-11-21 16:57:35,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:57:35,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:57:35,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:57:35,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:57:35,366 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:57:35,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i [2022-11-21 16:57:38,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:57:38,784 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:57:38,785 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i [2022-11-21 16:57:38,806 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/data/f4ea26f84/eb1863c5527a4a49b9f377e658c5ca18/FLAG14f4299b5 [2022-11-21 16:57:38,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/data/f4ea26f84/eb1863c5527a4a49b9f377e658c5ca18 [2022-11-21 16:57:38,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:57:38,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:57:38,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:57:38,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:57:38,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:57:38,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:57:38" (1/1) ... [2022-11-21 16:57:38,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270a719f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:38, skipping insertion in model container [2022-11-21 16:57:38,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:57:38" (1/1) ... [2022-11-21 16:57:38,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:57:38,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:57:39,282 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_a996522a-204e-4365-86e5-7c37ae7d7686/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i[30190,30203] [2022-11-21 16:57:39,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:57:39,306 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:57:39,340 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_a996522a-204e-4365-86e5-7c37ae7d7686/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-50.i[30190,30203] [2022-11-21 16:57:39,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:57:39,377 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:57:39,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39 WrapperNode [2022-11-21 16:57:39,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:57:39,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:57:39,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:57:39,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:57:39,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,422 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-21 16:57:39,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:57:39,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:57:39,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:57:39,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:57:39,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,448 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:57:39,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:57:39,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:57:39,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:57:39,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (1/1) ... [2022-11-21 16:57:39,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:57:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:39,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:57:39,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:57:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:57:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-21 16:57:39,547 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-21 16:57:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:57:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:57:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:57:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:57:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:57:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-21 16:57:39,550 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-21 16:57:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:57:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:57:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:57:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:57:39,552 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:57:39,700 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:57:39,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:57:39,998 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:57:40,006 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:57:40,006 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:57:40,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:57:40 BoogieIcfgContainer [2022-11-21 16:57:40,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:57:40,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:57:40,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:57:40,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:57:40,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:57:38" (1/3) ... [2022-11-21 16:57:40,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3480c091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:57:40, skipping insertion in model container [2022-11-21 16:57:40,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:57:39" (2/3) ... [2022-11-21 16:57:40,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3480c091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:57:40, skipping insertion in model container [2022-11-21 16:57:40,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:57:40" (3/3) ... [2022-11-21 16:57:40,019 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-50.i [2022-11-21 16:57:40,029 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:57:40,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:57:40,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:57:40,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:57:40,167 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:57:40,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-11-21 16:57:40,298 INFO L130 PetriNetUnfolder]: 24/202 cut-off events. [2022-11-21 16:57:40,298 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-21 16:57:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-11-21 16:57:40,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 204 flow [2022-11-21 16:57:40,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 194 flow [2022-11-21 16:57:40,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:57:40,325 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;@6d35b88f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:57:40,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:57:40,340 INFO L130 PetriNetUnfolder]: 4/64 cut-off events. [2022-11-21 16:57:40,341 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:57:40,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:40,342 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:40,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:57:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash -211201094, now seen corresponding path program 1 times [2022-11-21 16:57:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80063973] [2022-11-21 16:57:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80063973] [2022-11-21 16:57:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80063973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:40,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:40,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:57:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694488] [2022-11-21 16:57:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:57:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:57:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:57:40,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 91 [2022-11-21 16:57:40,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:40,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 91 [2022-11-21 16:57:40,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:40,724 INFO L130 PetriNetUnfolder]: 4/172 cut-off events. [2022-11-21 16:57:40,725 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-21 16:57:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 172 events. 4/172 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 553 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2022-11-21 16:57:40,727 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 4 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-11-21 16:57:40,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 190 flow [2022-11-21 16:57:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:57:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:57:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 167 transitions. [2022-11-21 16:57:40,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175824175824175 [2022-11-21 16:57:40,743 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 167 transitions. [2022-11-21 16:57:40,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 167 transitions. [2022-11-21 16:57:40,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 167 transitions. [2022-11-21 16:57:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,756 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,758 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 194 flow. Second operand 2 states and 167 transitions. [2022-11-21 16:57:40,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 190 flow [2022-11-21 16:57:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:40,765 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 182 flow [2022-11-21 16:57:40,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-11-21 16:57:40,771 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 0 predicate places. [2022-11-21 16:57:40,772 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 182 flow [2022-11-21 16:57:40,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:40,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:57:40,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:57:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -407714599, now seen corresponding path program 1 times [2022-11-21 16:57:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:40,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723932412] [2022-11-21 16:57:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723932412] [2022-11-21 16:57:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723932412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:40,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:40,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831548054] [2022-11-21 16:57:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:40,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:40,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:40,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 91 [2022-11-21 16:57:40,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:40,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:40,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 91 [2022-11-21 16:57:40,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:40,996 INFO L130 PetriNetUnfolder]: 0/80 cut-off events. [2022-11-21 16:57:40,997 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 16:57:40,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 80 events. 0/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-21 16:57:40,998 INFO L137 encePairwiseOnDemand]: 80/91 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-11-21 16:57:40,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 227 flow [2022-11-21 16:57:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:57:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-11-21 16:57:41,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7216117216117216 [2022-11-21 16:57:41,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-11-21 16:57:41,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-11-21 16:57:41,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:41,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-11-21 16:57:41,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,009 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-11-21 16:57:41,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 227 flow [2022-11-21 16:57:41,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:41,014 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 180 flow [2022-11-21 16:57:41,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-11-21 16:57:41,015 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2022-11-21 16:57:41,015 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 180 flow [2022-11-21 16:57:41,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:41,017 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:57:41,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:57:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash -121871665, now seen corresponding path program 1 times [2022-11-21 16:57:41,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:41,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356354791] [2022-11-21 16:57:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:41,085 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:57:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:41,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:57:41,151 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:57:41,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-21 16:57:41,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-21 16:57:41,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-21 16:57:41,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-21 16:57:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:57:41,156 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-21 16:57:41,160 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:57:41,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 16:57:41,224 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-21 16:57:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-11-21 16:57:41,393 INFO L130 PetriNetUnfolder]: 107/656 cut-off events. [2022-11-21 16:57:41,394 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-21 16:57:41,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3163 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-11-21 16:57:41,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 110 transitions, 268 flow [2022-11-21 16:57:41,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 268 flow [2022-11-21 16:57:41,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:57:41,419 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;@6d35b88f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:57:41,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:57:41,429 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-21 16:57:41,430 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:57:41,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:41,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:41,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:57:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash -341074863, now seen corresponding path program 1 times [2022-11-21 16:57:41,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:41,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433934899] [2022-11-21 16:57:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:41,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433934899] [2022-11-21 16:57:41,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433934899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:41,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:41,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:57:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372480092] [2022-11-21 16:57:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:41,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:57:41,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:57:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:57:41,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 110 [2022-11-21 16:57:41,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:41,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 110 [2022-11-21 16:57:41,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:41,671 INFO L130 PetriNetUnfolder]: 57/600 cut-off events. [2022-11-21 16:57:41,671 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-11-21 16:57:41,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 600 events. 57/600 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3087 event pairs, 1 based on Foata normal form. 81/631 useless extension candidates. Maximal degree in co-relation 392. Up to 73 conditions per place. [2022-11-21 16:57:41,675 INFO L137 encePairwiseOnDemand]: 104/110 looper letters, 12 selfloop transitions, 0 changer transitions 0/102 dead transitions. [2022-11-21 16:57:41,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 276 flow [2022-11-21 16:57:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:57:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:57:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 198 transitions. [2022-11-21 16:57:41,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-21 16:57:41,683 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 198 transitions. [2022-11-21 16:57:41,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 198 transitions. [2022-11-21 16:57:41,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:41,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 198 transitions. [2022-11-21 16:57:41,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,690 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,690 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 268 flow. Second operand 2 states and 198 transitions. [2022-11-21 16:57:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 276 flow [2022-11-21 16:57:41,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:41,697 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 252 flow [2022-11-21 16:57:41,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2022-11-21 16:57:41,700 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2022-11-21 16:57:41,700 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 252 flow [2022-11-21 16:57:41,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:41,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:41,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:57:41,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:57:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -537588368, now seen corresponding path program 1 times [2022-11-21 16:57:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972318824] [2022-11-21 16:57:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:41,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972318824] [2022-11-21 16:57:41,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972318824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:41,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:41,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:41,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929798706] [2022-11-21 16:57:41,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:41,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:41,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2022-11-21 16:57:41,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:41,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:41,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2022-11-21 16:57:41,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:42,097 INFO L130 PetriNetUnfolder]: 58/575 cut-off events. [2022-11-21 16:57:42,097 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-21 16:57:42,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 575 events. 58/575 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2885 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 1021. Up to 207 conditions per place. [2022-11-21 16:57:42,100 INFO L137 encePairwiseOnDemand]: 98/110 looper letters, 53 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-11-21 16:57:42,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 446 flow [2022-11-21 16:57:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:57:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-21 16:57:42,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-11-21 16:57:42,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-21 16:57:42,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-21 16:57:42,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:42,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-21 16:57:42,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,107 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 252 flow. Second operand 3 states and 260 transitions. [2022-11-21 16:57:42,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 446 flow [2022-11-21 16:57:42,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:42,114 INFO L231 Difference]: Finished difference. Result has 107 places, 106 transitions, 300 flow [2022-11-21 16:57:42,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=107, PETRI_TRANSITIONS=106} [2022-11-21 16:57:42,116 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-11-21 16:57:42,116 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 106 transitions, 300 flow [2022-11-21 16:57:42,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:42,117 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:57:42,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:57:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 853052668, now seen corresponding path program 1 times [2022-11-21 16:57:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:42,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029956620] [2022-11-21 16:57:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:42,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029956620] [2022-11-21 16:57:42,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029956620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445999760] [2022-11-21 16:57:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:42,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:42,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:42,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:57:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:57:42,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:42,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445999760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:42,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:42,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:57:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439909197] [2022-11-21 16:57:42,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:57:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:57:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:57:42,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 110 [2022-11-21 16:57:42,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:42,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 110 [2022-11-21 16:57:42,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:42,630 INFO L130 PetriNetUnfolder]: 0/57 cut-off events. [2022-11-21 16:57:42,630 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 16:57:42,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 57 events. 0/57 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-21 16:57:42,631 INFO L137 encePairwiseOnDemand]: 105/110 looper letters, 10 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-11-21 16:57:42,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 156 flow [2022-11-21 16:57:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:57:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:57:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 586 transitions. [2022-11-21 16:57:42,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.591919191919192 [2022-11-21 16:57:42,634 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 586 transitions. [2022-11-21 16:57:42,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 586 transitions. [2022-11-21 16:57:42,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:42,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 586 transitions. [2022-11-21 16:57:42,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.11111111111111) internal successors, (586), 9 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,639 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,639 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 300 flow. Second operand 9 states and 586 transitions. [2022-11-21 16:57:42,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 156 flow [2022-11-21 16:57:42,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-21 16:57:42,642 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 124 flow [2022-11-21 16:57:42,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2022-11-21 16:57:42,642 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2022-11-21 16:57:42,643 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 124 flow [2022-11-21 16:57:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:42,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:42,644 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:57:42,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:57:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1479036618, now seen corresponding path program 1 times [2022-11-21 16:57:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:42,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595748204] [2022-11-21 16:57:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:42,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:57:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:42,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:57:42,907 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:57:42,907 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-21 16:57:42,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-21 16:57:42,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-21 16:57:42,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-21 16:57:42,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-21 16:57:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:57:42,908 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:57:42,909 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:57:42,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 16:57:42,935 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-21 16:57:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-11-21 16:57:43,321 INFO L130 PetriNetUnfolder]: 496/2280 cut-off events. [2022-11-21 16:57:43,321 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-21 16:57:43,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14946 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-11-21 16:57:43,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 336 flow [2022-11-21 16:57:43,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 129 transitions, 336 flow [2022-11-21 16:57:43,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:57:43,351 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;@6d35b88f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:57:43,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 16:57:43,357 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2022-11-21 16:57:43,357 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:57:43,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:43,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:43,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:57:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1295698664, now seen corresponding path program 1 times [2022-11-21 16:57:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:43,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056906074] [2022-11-21 16:57:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:43,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056906074] [2022-11-21 16:57:43,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056906074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:43,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:43,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:57:43,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230847169] [2022-11-21 16:57:43,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:43,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:57:43,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:57:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:57:43,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 129 [2022-11-21 16:57:43,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 336 flow. Second operand has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:43,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 129 [2022-11-21 16:57:43,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:43,759 INFO L130 PetriNetUnfolder]: 336/2108 cut-off events. [2022-11-21 16:57:43,759 INFO L131 PetriNetUnfolder]: For 1217/1217 co-relation queries the response was YES. [2022-11-21 16:57:43,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 2108 events. 336/2108 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14781 event pairs, 32 based on Foata normal form. 358/2306 useless extension candidates. Maximal degree in co-relation 1473. Up to 400 conditions per place. [2022-11-21 16:57:43,777 INFO L137 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2022-11-21 16:57:43,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 352 flow [2022-11-21 16:57:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:57:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:57:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-11-21 16:57:43,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8798449612403101 [2022-11-21 16:57:43,779 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-11-21 16:57:43,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-11-21 16:57:43,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:43,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-11-21 16:57:43,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,782 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,782 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 336 flow. Second operand 2 states and 227 transitions. [2022-11-21 16:57:43,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 352 flow [2022-11-21 16:57:43,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:43,788 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 316 flow [2022-11-21 16:57:43,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=316, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2022-11-21 16:57:43,790 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2022-11-21 16:57:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 316 flow [2022-11-21 16:57:43,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:43,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:57:43,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:57:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1099185159, now seen corresponding path program 1 times [2022-11-21 16:57:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169096169] [2022-11-21 16:57:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169096169] [2022-11-21 16:57:43,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169096169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:43,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:43,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382455839] [2022-11-21 16:57:43,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:43,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 129 [2022-11-21 16:57:43,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:43,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:43,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 129 [2022-11-21 16:57:43,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:44,404 INFO L130 PetriNetUnfolder]: 444/2469 cut-off events. [2022-11-21 16:57:44,404 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-11-21 16:57:44,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2469 events. 444/2469 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19494 event pairs, 10 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 4682. Up to 1054 conditions per place. [2022-11-21 16:57:44,424 INFO L137 encePairwiseOnDemand]: 117/129 looper letters, 63 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-11-21 16:57:44,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 550 flow [2022-11-21 16:57:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:57:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2022-11-21 16:57:44,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7829457364341085 [2022-11-21 16:57:44,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2022-11-21 16:57:44,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2022-11-21 16:57:44,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:44,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2022-11-21 16:57:44,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:44,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:44,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:44,428 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 316 flow. Second operand 3 states and 303 transitions. [2022-11-21 16:57:44,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 550 flow [2022-11-21 16:57:44,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:44,432 INFO L231 Difference]: Finished difference. Result has 124 places, 123 transitions, 364 flow [2022-11-21 16:57:44,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=124, PETRI_TRANSITIONS=123} [2022-11-21 16:57:44,433 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2022-11-21 16:57:44,433 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 123 transitions, 364 flow [2022-11-21 16:57:44,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:44,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:44,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:44,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:57:44,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:57:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -524673210, now seen corresponding path program 1 times [2022-11-21 16:57:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:44,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264976535] [2022-11-21 16:57:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:44,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264976535] [2022-11-21 16:57:44,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264976535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140107935] [2022-11-21 16:57:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:44,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:44,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:44,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:44,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:57:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:44,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:57:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:44,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:44,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140107935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:44,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:44,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:57:44,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387100450] [2022-11-21 16:57:44,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:44,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:57:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:57:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:57:44,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2022-11-21 16:57:44,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 123 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:44,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:44,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2022-11-21 16:57:44,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:45,401 INFO L130 PetriNetUnfolder]: 423/2263 cut-off events. [2022-11-21 16:57:45,401 INFO L131 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-11-21 16:57:45,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 2263 events. 423/2263 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17642 event pairs, 35 based on Foata normal form. 2/2262 useless extension candidates. Maximal degree in co-relation 4761. Up to 482 conditions per place. [2022-11-21 16:57:45,418 INFO L137 encePairwiseOnDemand]: 114/129 looper letters, 59 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2022-11-21 16:57:45,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 624 flow [2022-11-21 16:57:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:57:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:57:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 822 transitions. [2022-11-21 16:57:45,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-11-21 16:57:45,422 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 822 transitions. [2022-11-21 16:57:45,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 822 transitions. [2022-11-21 16:57:45,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:45,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 822 transitions. [2022-11-21 16:57:45,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 82.2) internal successors, (822), 10 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:45,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:45,429 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:45,429 INFO L175 Difference]: Start difference. First operand has 124 places, 123 transitions, 364 flow. Second operand 10 states and 822 transitions. [2022-11-21 16:57:45,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 624 flow [2022-11-21 16:57:45,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:57:45,435 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 456 flow [2022-11-21 16:57:45,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-11-21 16:57:45,436 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 12 predicate places. [2022-11-21 16:57:45,436 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 456 flow [2022-11-21 16:57:45,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:45,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:45,437 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:45,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:45,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:57:45,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:57:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 531540147, now seen corresponding path program 1 times [2022-11-21 16:57:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825731844] [2022-11-21 16:57:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:45,668 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:57:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:57:45,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:57:45,708 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:57:45,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 16:57:45,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 16:57:45,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-21 16:57:45,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 16:57:45,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 16:57:45,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 16:57:45,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:57:45,710 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:57:45,711 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:57:45,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 16:57:45,763 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-21 16:57:45,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-11-21 16:57:47,372 INFO L130 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-11-21 16:57:47,372 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-21 16:57:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 74818 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-11-21 16:57:47,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 148 transitions, 408 flow [2022-11-21 16:57:47,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 408 flow [2022-11-21 16:57:47,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:57:47,509 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;@6d35b88f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:57:47,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:57:47,515 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2022-11-21 16:57:47,516 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:57:47,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:47,516 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:47,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:57:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 404176023, now seen corresponding path program 1 times [2022-11-21 16:57:47,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947878933] [2022-11-21 16:57:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:47,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:47,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947878933] [2022-11-21 16:57:47,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947878933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:47,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:47,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:57:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151578948] [2022-11-21 16:57:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:57:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:57:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:57:47,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 148 [2022-11-21 16:57:47,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:47,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:47,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 148 [2022-11-21 16:57:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:49,090 INFO L130 PetriNetUnfolder]: 1817/8164 cut-off events. [2022-11-21 16:57:49,090 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-11-21 16:57:49,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 8164 events. 1817/8164 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 74512 event pairs, 313 based on Foata normal form. 1608/9210 useless extension candidates. Maximal degree in co-relation 5991. Up to 2073 conditions per place. [2022-11-21 16:57:49,161 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 24 selfloop transitions, 0 changer transitions 0/136 dead transitions. [2022-11-21 16:57:49,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 432 flow [2022-11-21 16:57:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:57:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:57:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-11-21 16:57:49,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8648648648648649 [2022-11-21 16:57:49,165 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-11-21 16:57:49,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-11-21 16:57:49,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:49,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-11-21 16:57:49,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:49,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:49,167 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:49,167 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 408 flow. Second operand 2 states and 256 transitions. [2022-11-21 16:57:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 432 flow [2022-11-21 16:57:49,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 136 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:49,174 INFO L231 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2022-11-21 16:57:49,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2022-11-21 16:57:49,176 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, -3 predicate places. [2022-11-21 16:57:49,176 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2022-11-21 16:57:49,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:49,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:49,177 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:57:49,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:57:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash 207662518, now seen corresponding path program 1 times [2022-11-21 16:57:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:49,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209154856] [2022-11-21 16:57:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:49,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:49,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209154856] [2022-11-21 16:57:49,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209154856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:49,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:49,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847701526] [2022-11-21 16:57:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:49,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:49,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 148 [2022-11-21 16:57:49,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:49,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:49,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 148 [2022-11-21 16:57:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:51,244 INFO L130 PetriNetUnfolder]: 2570/10361 cut-off events. [2022-11-21 16:57:51,244 INFO L131 PetriNetUnfolder]: For 3152/3152 co-relation queries the response was YES. [2022-11-21 16:57:51,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20629 conditions, 10361 events. 2570/10361 cut-off events. For 3152/3152 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 102809 event pairs, 152 based on Foata normal form. 0/9823 useless extension candidates. Maximal degree in co-relation 20618. Up to 4843 conditions per place. [2022-11-21 16:57:51,337 INFO L137 encePairwiseOnDemand]: 136/148 looper letters, 73 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2022-11-21 16:57:51,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 658 flow [2022-11-21 16:57:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:57:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-11-21 16:57:51,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2022-11-21 16:57:51,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-11-21 16:57:51,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-11-21 16:57:51,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:51,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-11-21 16:57:51,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,343 INFO L175 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 3 states and 346 transitions. [2022-11-21 16:57:51,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 658 flow [2022-11-21 16:57:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 168 transitions, 658 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:57:51,349 INFO L231 Difference]: Finished difference. Result has 141 places, 140 transitions, 432 flow [2022-11-21 16:57:51,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2022-11-21 16:57:51,351 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-11-21 16:57:51,351 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 432 flow [2022-11-21 16:57:51,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:51,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:57:51,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:57:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 676761736, now seen corresponding path program 1 times [2022-11-21 16:57:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943984544] [2022-11-21 16:57:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:51,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943984544] [2022-11-21 16:57:51,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943984544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834556548] [2022-11-21 16:57:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:51,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:51,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:51,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:57:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:57:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:51,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:57:51,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834556548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:51,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:51,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:57:51,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685184618] [2022-11-21 16:57:51,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:51,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:57:51,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:57:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:57:51,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 148 [2022-11-21 16:57:51,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:51,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 148 [2022-11-21 16:57:51,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:57:53,459 INFO L130 PetriNetUnfolder]: 2538/10077 cut-off events. [2022-11-21 16:57:53,459 INFO L131 PetriNetUnfolder]: For 3601/3601 co-relation queries the response was YES. [2022-11-21 16:57:53,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21963 conditions, 10077 events. 2538/10077 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 103263 event pairs, 214 based on Foata normal form. 2/10071 useless extension candidates. Maximal degree in co-relation 21950. Up to 2161 conditions per place. [2022-11-21 16:57:53,565 INFO L137 encePairwiseOnDemand]: 133/148 looper letters, 69 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2022-11-21 16:57:53,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 732 flow [2022-11-21 16:57:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:57:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:57:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 942 transitions. [2022-11-21 16:57:53,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6364864864864865 [2022-11-21 16:57:53,569 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 942 transitions. [2022-11-21 16:57:53,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 942 transitions. [2022-11-21 16:57:53,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:57:53,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 942 transitions. [2022-11-21 16:57:53,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.2) internal successors, (942), 10 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,577 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,577 INFO L175 Difference]: Start difference. First operand has 141 places, 140 transitions, 432 flow. Second operand 10 states and 942 transitions. [2022-11-21 16:57:53,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 732 flow [2022-11-21 16:57:53,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 175 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:57:53,592 INFO L231 Difference]: Finished difference. Result has 152 places, 149 transitions, 524 flow [2022-11-21 16:57:53,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-11-21 16:57:53,593 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2022-11-21 16:57:53,593 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 524 flow [2022-11-21 16:57:53,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:57:53,594 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:53,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:53,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a996522a-204e-4365-86e5-7c37ae7d7686/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:57:53,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:57:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1377560969, now seen corresponding path program 1 times [2022-11-21 16:57:53,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:53,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118718429] [2022-11-21 16:57:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 16:57:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:53,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118718429] [2022-11-21 16:57:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118718429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:53,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:57:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398336385] [2022-11-21 16:57:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:57:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:57:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:57:53,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 148 [2022-11-21 16:57:53,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:57:53,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 148 [2022-11-21 16:57:53,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand