./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8 --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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:06:36,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:06:36,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:06:36,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:06:36,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:06:36,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:06:36,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:06:36,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:06:36,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:06:36,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:06:36,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:06:36,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:06:36,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:06:36,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:06:36,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:06:36,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:06:36,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:06:36,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:06:36,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:06:36,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:06:36,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:06:36,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:06:36,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:06:36,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:06:36,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:06:36,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:06:36,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:06:36,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:06:36,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:06:36,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:06:36,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:06:36,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:06:36,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:06:36,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:06:36,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:06:36,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:06:36,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:06:36,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:06:36,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:06:36,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:06:36,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:06:36,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:06:36,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:06:36,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:06:36,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:06:36,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:06:36,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:06:36,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:06:36,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:06:36,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:06:36,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:06:36,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:06:36,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:06:36,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:06:36,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:06:36,967 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:06:36,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:06:36,967 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:06:36,967 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2022-12-13 17:06:37,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:06:37,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:06:37,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:06:37,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:06:37,201 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:06:37,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-12-13 17:06:39,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:06:40,015 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:06:40,016 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-12-13 17:06:40,025 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/data/ef43409fb/b40455e6a0c94f12b376cb555c166a4d/FLAG3e324fbce [2022-12-13 17:06:40,037 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/data/ef43409fb/b40455e6a0c94f12b376cb555c166a4d [2022-12-13 17:06:40,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:06:40,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:06:40,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:06:40,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:06:40,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:06:40,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e7b7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40, skipping insertion in model container [2022-12-13 17:06:40,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:06:40,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:06:40,335 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_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-12-13 17:06:40,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:06:40,363 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:06:40,394 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-12-13 17:06:40,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:06:40,429 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:06:40,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40 WrapperNode [2022-12-13 17:06:40,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:06:40,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:06:40,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:06:40,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:06:40,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,467 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-12-13 17:06:40,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:06:40,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:06:40,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:06:40,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:06:40,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,490 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:06:40,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:06:40,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:06:40,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:06:40,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (1/1) ... [2022-12-13 17:06:40,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:06:40,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:40,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:06:40,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:06:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:06:40,544 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:06:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:06:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:06:40,546 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:06:40,640 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:06:40,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:06:40,793 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:06:40,799 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:06:40,799 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 17:06:40,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:06:40 BoogieIcfgContainer [2022-12-13 17:06:40,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:06:40,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:06:40,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:06:40,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:06:40,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:06:40" (1/3) ... [2022-12-13 17:06:40,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b045e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:06:40, skipping insertion in model container [2022-12-13 17:06:40,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:06:40" (2/3) ... [2022-12-13 17:06:40,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b045e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:06:40, skipping insertion in model container [2022-12-13 17:06:40,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:06:40" (3/3) ... [2022-12-13 17:06:40,809 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2022-12-13 17:06:40,819 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:06:40,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:06:40,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:06:40,827 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:06:40,874 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 17:06:40,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 112 transitions, 232 flow [2022-12-13 17:06:40,949 INFO L130 PetriNetUnfolder]: 17/148 cut-off events. [2022-12-13 17:06:40,949 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:06:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 148 events. 17/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-12-13 17:06:40,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 112 transitions, 232 flow [2022-12-13 17:06:40,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 219 flow [2022-12-13 17:06:40,961 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:06:40,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 107 transitions, 219 flow [2022-12-13 17:06:40,971 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 107 transitions, 219 flow [2022-12-13 17:06:40,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 219 flow [2022-12-13 17:06:41,000 INFO L130 PetriNetUnfolder]: 16/143 cut-off events. [2022-12-13 17:06:41,000 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:41,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 16/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 311 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-12-13 17:06:41,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2022-12-13 17:06:43,570 INFO L134 LiptonReduction]: Checked pairs total: 4265 [2022-12-13 17:06:43,570 INFO L136 LiptonReduction]: Total number of compositions: 93 [2022-12-13 17:06:43,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:06:43,588 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;@837aa85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:06:43,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:06:43,591 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 17:06:43,591 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:43,591 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:43,592 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:06:43,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 13185466, now seen corresponding path program 1 times [2022-12-13 17:06:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:43,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586792808] [2022-12-13 17:06:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586792808] [2022-12-13 17:06:43,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586792808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:06:43,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:06:43,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:06:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560662044] [2022-12-13 17:06:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:06:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:06:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:06:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:06:43,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2022-12-13 17:06:43,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:43,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:43,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2022-12-13 17:06:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:43,875 INFO L130 PetriNetUnfolder]: 64/154 cut-off events. [2022-12-13 17:06:43,876 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:43,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 154 events. 64/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 515 event pairs, 49 based on Foata normal form. 9/144 useless extension candidates. Maximal degree in co-relation 293. Up to 137 conditions per place. [2022-12-13 17:06:43,877 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2022-12-13 17:06:43,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 119 flow [2022-12-13 17:06:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:06:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:06:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2022-12-13 17:06:43,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2022-12-13 17:06:43,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2022-12-13 17:06:43,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2022-12-13 17:06:43,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:43,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2022-12-13 17:06:43,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:43,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:43,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:43,898 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 325 transitions. [2022-12-13 17:06:43,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 119 flow [2022-12-13 17:06:43,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 119 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:06:43,901 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2022-12-13 17:06:43,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 17:06:43,905 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-12-13 17:06:43,906 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2022-12-13 17:06:43,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:43,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:43,906 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:06:43,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:06:43,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash -222275505, now seen corresponding path program 1 times [2022-12-13 17:06:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442634072] [2022-12-13 17:06:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:43,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:06:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:43,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:06:43,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:06:43,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:06:43,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:06:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:06:43,958 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:06:43,961 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:06:43,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:06:43,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:06:43,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,000 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2022-12-13 17:06:44,000 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:06:44,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 659 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-12-13 17:06:44,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:06:44,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2022-12-13 17:06:44,021 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2022-12-13 17:06:44,022 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:06:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 659 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-12-13 17:06:44,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 6888 [2022-12-13 17:06:45,847 INFO L134 LiptonReduction]: Checked pairs total: 15910 [2022-12-13 17:06:45,848 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-12-13 17:06:45,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:06:45,850 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;@837aa85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:06:45,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:06:45,852 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 17:06:45,852 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:45,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:45,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:06:45,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash 21713316, now seen corresponding path program 1 times [2022-12-13 17:06:45,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:45,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750587202] [2022-12-13 17:06:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:45,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750587202] [2022-12-13 17:06:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750587202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:06:45,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:06:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:06:45,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537924456] [2022-12-13 17:06:45,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:06:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:06:45,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:06:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:06:45,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 247 [2022-12-13 17:06:45,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:45,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:45,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 247 [2022-12-13 17:06:45,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:46,123 INFO L130 PetriNetUnfolder]: 1260/2319 cut-off events. [2022-12-13 17:06:46,124 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-13 17:06:46,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4451 conditions, 2319 events. 1260/2319 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13716 event pairs, 1137 based on Foata normal form. 461/2531 useless extension candidates. Maximal degree in co-relation 2286. Up to 2071 conditions per place. [2022-12-13 17:06:46,131 INFO L137 encePairwiseOnDemand]: 230/247 looper letters, 28 selfloop transitions, 2 changer transitions 9/49 dead transitions. [2022-12-13 17:06:46,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 192 flow [2022-12-13 17:06:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:06:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:06:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-12-13 17:06:46,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5492577597840755 [2022-12-13 17:06:46,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-12-13 17:06:46,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-12-13 17:06:46,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:46,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-12-13 17:06:46,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,143 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 407 transitions. [2022-12-13 17:06:46,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 192 flow [2022-12-13 17:06:46,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:06:46,147 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2022-12-13 17:06:46,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-12-13 17:06:46,148 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-12-13 17:06:46,148 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2022-12-13 17:06:46,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:46,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:06:46,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:06:46,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1284968394, now seen corresponding path program 1 times [2022-12-13 17:06:46,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347773990] [2022-12-13 17:06:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:46,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:46,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347773990] [2022-12-13 17:06:46,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347773990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:06:46,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111954214] [2022-12-13 17:06:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:46,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:46,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:06:46,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:06:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:06:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:06:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:46,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:06:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:46,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111954214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:06:46,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:06:46,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:06:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842222358] [2022-12-13 17:06:46,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:06:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:06:46,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:06:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:06:46,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 247 [2022-12-13 17:06:46,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:46,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 247 [2022-12-13 17:06:46,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:46,452 INFO L130 PetriNetUnfolder]: 286/596 cut-off events. [2022-12-13 17:06:46,452 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-12-13 17:06:46,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 596 events. 286/596 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2992 event pairs, 50 based on Foata normal form. 70/663 useless extension candidates. Maximal degree in co-relation 1079. Up to 346 conditions per place. [2022-12-13 17:06:46,456 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2022-12-13 17:06:46,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2022-12-13 17:06:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:06:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:06:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-12-13 17:06:46,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5012145748987854 [2022-12-13 17:06:46,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-12-13 17:06:46,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-12-13 17:06:46,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:46,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-12-13 17:06:46,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,464 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 619 transitions. [2022-12-13 17:06:46,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2022-12-13 17:06:46,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:06:46,467 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 17:06:46,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 17:06:46,468 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-12-13 17:06:46,468 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 17:06:46,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:46,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:46,469 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:06:46,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:06:46,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:46,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash -768707644, now seen corresponding path program 1 times [2022-12-13 17:06:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:46,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057378902] [2022-12-13 17:06:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:46,686 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:06:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:46,702 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:06:46,703 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:06:46,703 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:06:46,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:06:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:06:46,703 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:06:46,704 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:06:46,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:06:46,722 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:06:46,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,766 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2022-12-13 17:06:46,766 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:06:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1153 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2022-12-13 17:06:46,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,771 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:06:46,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 172 transitions, 374 flow [2022-12-13 17:06:46,813 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2022-12-13 17:06:46,813 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:06:46,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1153 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2022-12-13 17:06:46,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2022-12-13 17:06:49,219 INFO L134 LiptonReduction]: Checked pairs total: 33802 [2022-12-13 17:06:49,219 INFO L136 LiptonReduction]: Total number of compositions: 120 [2022-12-13 17:06:49,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:06:49,221 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@837aa85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:06:49,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:06:49,222 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 17:06:49,222 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:49,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:49,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:06:49,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash 31625610, now seen corresponding path program 1 times [2022-12-13 17:06:49,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:49,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741009585] [2022-12-13 17:06:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:49,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741009585] [2022-12-13 17:06:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741009585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:06:49,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:06:49,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:06:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043514503] [2022-12-13 17:06:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:06:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:06:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:06:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:06:49,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 292 [2022-12-13 17:06:49,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:49,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:49,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 292 [2022-12-13 17:06:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:51,445 INFO L130 PetriNetUnfolder]: 23815/35594 cut-off events. [2022-12-13 17:06:51,445 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2022-12-13 17:06:51,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69937 conditions, 35594 events. 23815/35594 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 242307 event pairs, 22652 based on Foata normal form. 7139/39789 useless extension candidates. Maximal degree in co-relation 27178. Up to 33630 conditions per place. [2022-12-13 17:06:51,536 INFO L137 encePairwiseOnDemand]: 269/292 looper letters, 41 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2022-12-13 17:06:51,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 262 flow [2022-12-13 17:06:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:06:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:06:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2022-12-13 17:06:51,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5627853881278538 [2022-12-13 17:06:51,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2022-12-13 17:06:51,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2022-12-13 17:06:51,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:51,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2022-12-13 17:06:51,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,540 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 493 transitions. [2022-12-13 17:06:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 262 flow [2022-12-13 17:06:51,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:06:51,542 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2022-12-13 17:06:51,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-12-13 17:06:51,543 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-12-13 17:06:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2022-12-13 17:06:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:51,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:06:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:06:51,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1515481219, now seen corresponding path program 1 times [2022-12-13 17:06:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:51,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99335701] [2022-12-13 17:06:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:51,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99335701] [2022-12-13 17:06:51,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99335701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:06:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329723340] [2022-12-13 17:06:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:51,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:51,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:06:51,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:06:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:06:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:06:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:51,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:06:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:51,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329723340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:06:51,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:06:51,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:06:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493254203] [2022-12-13 17:06:51,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:06:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:06:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:06:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:06:51,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 292 [2022-12-13 17:06:51,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:51,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 292 [2022-12-13 17:06:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:52,330 INFO L130 PetriNetUnfolder]: 5560/8956 cut-off events. [2022-12-13 17:06:52,330 INFO L131 PetriNetUnfolder]: For 3520/3520 co-relation queries the response was YES. [2022-12-13 17:06:52,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20351 conditions, 8956 events. 5560/8956 cut-off events. For 3520/3520 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 58292 event pairs, 700 based on Foata normal form. 819/9755 useless extension candidates. Maximal degree in co-relation 17965. Up to 5346 conditions per place. [2022-12-13 17:06:52,364 INFO L137 encePairwiseOnDemand]: 289/292 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2022-12-13 17:06:52,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 385 flow [2022-12-13 17:06:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:06:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:06:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 908 transitions. [2022-12-13 17:06:52,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182648401826484 [2022-12-13 17:06:52,367 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 908 transitions. [2022-12-13 17:06:52,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 908 transitions. [2022-12-13 17:06:52,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:52,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 908 transitions. [2022-12-13 17:06:52,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.33333333333334) internal successors, (908), 6 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:52,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:52,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:52,374 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 908 transitions. [2022-12-13 17:06:52,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 385 flow [2022-12-13 17:06:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 377 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:06:52,382 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 17:06:52,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 17:06:52,383 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-12-13 17:06:52,383 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 17:06:52,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:52,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:52,384 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:06:52,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:06:52,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 17:06:52,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash -50807682, now seen corresponding path program 1 times [2022-12-13 17:06:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:52,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148705998] [2022-12-13 17:06:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:52,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:52,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:06:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:06:52,644 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:06:52,644 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:06:52,644 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:06:52,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:06:52,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:06:52,645 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:06:52,645 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:06:52,646 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:06:52,668 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:06:52,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,748 INFO L130 PetriNetUnfolder]: 81/555 cut-off events. [2022-12-13 17:06:52,748 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:06:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 555 events. 81/555 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2075 event pairs, 6 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2022-12-13 17:06:52,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:06:52,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 202 transitions, 448 flow [2022-12-13 17:06:52,812 INFO L130 PetriNetUnfolder]: 81/555 cut-off events. [2022-12-13 17:06:52,813 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:06:52,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 555 events. 81/555 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2075 event pairs, 6 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2022-12-13 17:06:52,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 20720 [2022-12-13 17:06:55,295 INFO L134 LiptonReduction]: Checked pairs total: 56612 [2022-12-13 17:06:55,295 INFO L136 LiptonReduction]: Total number of compositions: 135 [2022-12-13 17:06:55,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:06:55,296 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;@837aa85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:06:55,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:06:55,297 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 17:06:55,297 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:06:55,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:55,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:06:55,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:06:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 42923123, now seen corresponding path program 1 times [2022-12-13 17:06:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:55,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450599420] [2022-12-13 17:06:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:55,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450599420] [2022-12-13 17:06:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450599420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:06:55,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:06:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:06:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351556956] [2022-12-13 17:06:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:06:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:06:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:06:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:06:55,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 337 [2022-12-13 17:06:55,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:55,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:55,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 337 [2022-12-13 17:06:55,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:07:13,752 INFO L130 PetriNetUnfolder]: 212870/297271 cut-off events. [2022-12-13 17:07:13,752 INFO L131 PetriNetUnfolder]: For 12215/12215 co-relation queries the response was YES. [2022-12-13 17:07:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583006 conditions, 297271 events. 212870/297271 cut-off events. For 12215/12215 co-relation queries the response was YES. Maximal size of possible extension queue 6742. Compared 2322831 event pairs, 157066 based on Foata normal form. 50828/328145 useless extension candidates. Maximal degree in co-relation 56132. Up to 278951 conditions per place. [2022-12-13 17:07:14,642 INFO L137 encePairwiseOnDemand]: 308/337 looper letters, 46 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2022-12-13 17:07:14,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 312 flow [2022-12-13 17:07:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:07:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:07:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2022-12-13 17:07:14,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5647873392680515 [2022-12-13 17:07:14,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2022-12-13 17:07:14,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2022-12-13 17:07:14,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:07:14,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2022-12-13 17:07:14,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:14,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:14,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:14,648 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 571 transitions. [2022-12-13 17:07:14,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 312 flow [2022-12-13 17:07:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:07:14,652 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2022-12-13 17:07:14,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2022-12-13 17:07:14,653 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2022-12-13 17:07:14,653 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2022-12-13 17:07:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:14,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:07:14,653 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:07:14,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:07:14,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:07:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:07:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2082884690, now seen corresponding path program 1 times [2022-12-13 17:07:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:07:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619304314] [2022-12-13 17:07:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:07:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:07:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:07:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:14,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:07:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619304314] [2022-12-13 17:07:14,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619304314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:07:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679175826] [2022-12-13 17:07:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:07:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:07:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:07:14,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:07:14,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:07:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:07:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:07:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:07:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:14,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:07:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:14,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679175826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:07:14,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:07:14,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:07:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42753974] [2022-12-13 17:07:14,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:07:14,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:07:14,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:07:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:07:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:07:14,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 337 [2022-12-13 17:07:14,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:14,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:07:14,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 337 [2022-12-13 17:07:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:07:22,769 INFO L130 PetriNetUnfolder]: 96934/130720 cut-off events. [2022-12-13 17:07:22,769 INFO L131 PetriNetUnfolder]: For 11690/11690 co-relation queries the response was YES. [2022-12-13 17:07:22,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271763 conditions, 130720 events. 96934/130720 cut-off events. For 11690/11690 co-relation queries the response was YES. Maximal size of possible extension queue 3415. Compared 913321 event pairs, 4546 based on Foata normal form. 584/131279 useless extension candidates. Maximal degree in co-relation 97292. Up to 83201 conditions per place. [2022-12-13 17:07:23,377 INFO L137 encePairwiseOnDemand]: 333/337 looper letters, 111 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2022-12-13 17:07:23,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 548 flow [2022-12-13 17:07:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:07:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:07:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1074 transitions. [2022-12-13 17:07:23,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5311572700296736 [2022-12-13 17:07:23,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1074 transitions. [2022-12-13 17:07:23,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1074 transitions. [2022-12-13 17:07:23,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:07:23,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1074 transitions. [2022-12-13 17:07:23,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:23,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:23,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:23,385 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1074 transitions. [2022-12-13 17:07:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 548 flow [2022-12-13 17:07:23,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 134 transitions, 534 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:07:23,412 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 17:07:23,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 17:07:23,413 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-12-13 17:07:23,413 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 17:07:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:23,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:07:23,414 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:07:23,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:07:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0a9574-d173-49ea-ab6a-a6dbe7578bf5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:07:23,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:07:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:07:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -681533346, now seen corresponding path program 1 times [2022-12-13 17:07:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:07:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734902130] [2022-12-13 17:07:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:07:23,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:07:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:07:23,658 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:07:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:07:23,695 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:07:23,696 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:07:23,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:07:23,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:07:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:07:23,697 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:07:23,698 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:07:23,698 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:07:23,732 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 17:07:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:23,820 INFO L130 PetriNetUnfolder]: 140/887 cut-off events. [2022-12-13 17:07:23,820 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:07:23,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 887 events. 140/887 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3939 event pairs, 23 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 600. Up to 80 conditions per place. [2022-12-13 17:07:23,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:23,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:23,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:07:23,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:23,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:23,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 232 transitions, 524 flow [2022-12-13 17:07:24,041 INFO L130 PetriNetUnfolder]: 140/887 cut-off events. [2022-12-13 17:07:24,041 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:07:24,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 887 events. 140/887 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3939 event pairs, 23 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 600. Up to 80 conditions per place. [2022-12-13 17:07:24,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 30240 [2022-12-13 17:07:26,483 INFO L134 LiptonReduction]: Checked pairs total: 84545 [2022-12-13 17:07:26,483 INFO L136 LiptonReduction]: Total number of compositions: 150 [2022-12-13 17:07:26,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:07:26,484 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;@837aa85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:07:26,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:07:26,485 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 17:07:26,486 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:07:26,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:07:26,486 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:07:26,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:07:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:07:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash 55605295, now seen corresponding path program 1 times [2022-12-13 17:07:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:07:26,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438364269] [2022-12-13 17:07:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:07:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:07:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:07:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:07:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438364269] [2022-12-13 17:07:26,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438364269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:07:26,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:07:26,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:07:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119645688] [2022-12-13 17:07:26,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:07:26,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:07:26,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:07:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:07:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:07:26,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 382 [2022-12-13 17:07:26,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:26,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:07:26,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 382 [2022-12-13 17:07:26,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand