./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- 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-dbf71c6-m [2022-10-17 10:29:17,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:29:17,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:29:17,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:29:17,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:29:17,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:29:17,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:29:17,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:29:17,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:29:17,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:29:17,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:29:17,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:29:17,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:29:17,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:29:17,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:29:17,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:29:17,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:29:17,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:29:17,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:29:17,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:29:17,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:29:17,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:29:17,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:29:17,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:29:17,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:29:17,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:29:17,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:29:17,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:29:17,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:29:17,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:29:17,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:29:17,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:29:17,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:29:17,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:29:17,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:29:17,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:29:17,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:29:17,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:29:17,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:29:17,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:29:17,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:29:17,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:29:18,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:29:18,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:29:18,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:29:18,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:29:18,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:29:18,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:29:18,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:29:18,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:29:18,054 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:29:18,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:29:18,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:29:18,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:29:18,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:29:18,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:29:18,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:29:18,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:29:18,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:29:18,057 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:29:18,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:29:18,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:29:18,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:29:18,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:29:18,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:29:18,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:29:18,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:18,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:29:18,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:29:18,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:29:18,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:29:18,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:29:18,060 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:29:18,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:29:18,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:29:18,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2022-10-17 10:29:18,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:29:18,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:29:18,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:29:18,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:29:18,456 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:29:18,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread/queue_longest.i [2022-10-17 10:29:18,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/data/2a0540636/447fc28299e04167b8c22e43eb976d38/FLAG28cd45a35 [2022-10-17 10:29:19,318 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:29:19,319 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i [2022-10-17 10:29:19,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/data/2a0540636/447fc28299e04167b8c22e43eb976d38/FLAG28cd45a35 [2022-10-17 10:29:19,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/data/2a0540636/447fc28299e04167b8c22e43eb976d38 [2022-10-17 10:29:19,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:29:19,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:29:19,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:19,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:29:19,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:29:19,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:19" (1/1) ... [2022-10-17 10:29:19,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2af08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:19, skipping insertion in model container [2022-10-17 10:29:19,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:19" (1/1) ... [2022-10-17 10:29:19,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:29:19,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:29:20,319 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-10-17 10:29:20,336 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-10-17 10:29:20,343 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-10-17 10:29:20,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:20,371 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:29:20,429 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-10-17 10:29:20,431 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-10-17 10:29:20,435 WARN L230 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_51d8d818-851b-47c2-8ce5-c8f754bef061/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-10-17 10:29:20,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:20,542 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:29:20,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20 WrapperNode [2022-10-17 10:29:20,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:20,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:20,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:29:20,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:29:20,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,667 INFO L138 Inliner]: procedures = 274, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2022-10-17 10:29:20,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:20,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:29:20,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:29:20,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:29:20,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:29:20,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:29:20,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:29:20,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:29:20,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (1/1) ... [2022-10-17 10:29:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:20,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:29:20,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51d8d818-851b-47c2-8ce5-c8f754bef061/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:29:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-10-17 10:29:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-10-17 10:29:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-10-17 10:29:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-10-17 10:29:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:29:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:29:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:29:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:29:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:29:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:29:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:29:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:29:20,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:29:20,866 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:29:21,072 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:29:21,087 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:29:21,667 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:29:21,681 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:29:21,681 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:29:21,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:21 BoogieIcfgContainer [2022-10-17 10:29:21,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:29:21,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:29:21,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:29:21,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:29:21,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:29:19" (1/3) ... [2022-10-17 10:29:21,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9cbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:21, skipping insertion in model container [2022-10-17 10:29:21,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:20" (2/3) ... [2022-10-17 10:29:21,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9cbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:21, skipping insertion in model container [2022-10-17 10:29:21,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:21" (3/3) ... [2022-10-17 10:29:21,695 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2022-10-17 10:29:21,710 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:29:21,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:29:21,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-10-17 10:29:21,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:29:21,912 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:29:21,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 274 transitions, 564 flow [2022-10-17 10:29:22,209 INFO L130 PetriNetUnfolder]: 15/272 cut-off events. [2022-10-17 10:29:22,212 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:29:22,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 272 events. 15/272 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 362 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-10-17 10:29:22,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 274 transitions, 564 flow [2022-10-17 10:29:22,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 262 transitions, 533 flow [2022-10-17 10:29:22,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:22,279 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;@59bd5b50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:22,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 10:29:22,307 INFO L130 PetriNetUnfolder]: 1/65 cut-off events. [2022-10-17 10:29:22,308 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:29:22,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:22,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:22,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash -266547570, now seen corresponding path program 1 times [2022-10-17 10:29:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:22,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657483299] [2022-10-17 10:29:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:22,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657483299] [2022-10-17 10:29:22,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657483299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:22,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:22,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:29:22,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289693880] [2022-10-17 10:29:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:22,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:29:22,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:22,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:29:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:29:22,778 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 274 [2022-10-17 10:29:22,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 262 transitions, 533 flow. Second operand has 2 states, 2 states have (on average 261.5) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-10-17 10:29:22,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:22,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 274 [2022-10-17 10:29:22,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:22,918 INFO L130 PetriNetUnfolder]: 10/251 cut-off events. [2022-10-17 10:29:22,919 INFO L131 PetriNetUnfolder]: For 5/6 co-relation queries the response was YES. [2022-10-17 10:29:22,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 251 events. 10/251 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 284 event pairs, 0 based on Foata normal form. 7/246 useless extension candidates. Maximal degree in co-relation 191. Up to 4 conditions per place. [2022-10-17 10:29:22,928 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 3 selfloop transitions, 0 changer transitions 0/251 dead transitions. [2022-10-17 10:29:22,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 251 transitions, 517 flow [2022-10-17 10:29:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:29:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:29:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 530 transitions. [2022-10-17 10:29:22,959 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9671532846715328 [2022-10-17 10:29:22,959 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 530 transitions. [2022-10-17 10:29:22,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 530 transitions. [2022-10-17 10:29:22,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:22,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 530 transitions. [2022-10-17 10:29:22,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 265.0) internal successors, (530), 2 states have internal predecessors, (530), 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) [2022-10-17 10:29:22,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:22,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:22,984 INFO L175 Difference]: Start difference. First operand has 254 places, 262 transitions, 533 flow. Second operand 2 states and 530 transitions. [2022-10-17 10:29:22,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 251 transitions, 517 flow [2022-10-17 10:29:22,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 251 transitions, 512 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:29:22,998 INFO L231 Difference]: Finished difference. Result has 246 places, 251 transitions, 506 flow [2022-10-17 10:29:23,001 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=506, PETRI_PLACES=246, PETRI_TRANSITIONS=251} [2022-10-17 10:29:23,005 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-10-17 10:29:23,005 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 251 transitions, 506 flow [2022-10-17 10:29:23,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.5) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-10-17 10:29:23,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:23,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:29:23,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1627698218, now seen corresponding path program 1 times [2022-10-17 10:29:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:23,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349098376] [2022-10-17 10:29:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349098376] [2022-10-17 10:29:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349098376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:24,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:24,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:29:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415043541] [2022-10-17 10:29:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:29:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:29:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:29:24,644 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 274 [2022-10-17 10:29:24,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 251 transitions, 506 flow. Second operand has 12 states, 12 states have (on average 199.75) internal successors, (2397), 12 states have internal predecessors, (2397), 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) [2022-10-17 10:29:24,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:24,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 274 [2022-10-17 10:29:24,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:26,659 INFO L130 PetriNetUnfolder]: 1003/4117 cut-off events. [2022-10-17 10:29:26,659 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-10-17 10:29:26,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5628 conditions, 4117 events. 1003/4117 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 33926 event pairs, 789 based on Foata normal form. 0/3832 useless extension candidates. Maximal degree in co-relation 5625. Up to 1435 conditions per place. [2022-10-17 10:29:26,705 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 52 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2022-10-17 10:29:26,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 247 transitions, 626 flow [2022-10-17 10:29:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:29:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:29:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2626 transitions. [2022-10-17 10:29:26,719 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7372262773722628 [2022-10-17 10:29:26,719 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2626 transitions. [2022-10-17 10:29:26,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2626 transitions. [2022-10-17 10:29:26,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:26,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2626 transitions. [2022-10-17 10:29:26,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 202.0) internal successors, (2626), 13 states have internal predecessors, (2626), 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) [2022-10-17 10:29:26,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 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) [2022-10-17 10:29:26,754 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 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) [2022-10-17 10:29:26,754 INFO L175 Difference]: Start difference. First operand has 246 places, 251 transitions, 506 flow. Second operand 13 states and 2626 transitions. [2022-10-17 10:29:26,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 247 transitions, 626 flow [2022-10-17 10:29:26,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 247 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:26,765 INFO L231 Difference]: Finished difference. Result has 255 places, 247 transitions, 522 flow [2022-10-17 10:29:26,766 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=522, PETRI_PLACES=255, PETRI_TRANSITIONS=247} [2022-10-17 10:29:26,767 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, 1 predicate places. [2022-10-17 10:29:26,768 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 247 transitions, 522 flow [2022-10-17 10:29:26,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.75) internal successors, (2397), 12 states have internal predecessors, (2397), 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) [2022-10-17 10:29:26,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:29:26,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2013468752, now seen corresponding path program 1 times [2022-10-17 10:29:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:26,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136370991] [2022-10-17 10:29:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:26,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:26,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:26,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136370991] [2022-10-17 10:29:26,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136370991] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:26,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:26,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965416114] [2022-10-17 10:29:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:26,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:26,924 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 274 [2022-10-17 10:29:26,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 247 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 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) [2022-10-17 10:29:26,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:26,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 274 [2022-10-17 10:29:26,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:27,082 INFO L130 PetriNetUnfolder]: 26/432 cut-off events. [2022-10-17 10:29:27,082 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:29:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 432 events. 26/432 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1077 event pairs, 2 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 495. Up to 13 conditions per place. [2022-10-17 10:29:27,088 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 9 selfloop transitions, 5 changer transitions 0/247 dead transitions. [2022-10-17 10:29:27,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 247 transitions, 554 flow [2022-10-17 10:29:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:29:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:29:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1015 transitions. [2022-10-17 10:29:27,094 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.926094890510949 [2022-10-17 10:29:27,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1015 transitions. [2022-10-17 10:29:27,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1015 transitions. [2022-10-17 10:29:27,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:27,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1015 transitions. [2022-10-17 10:29:27,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 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) [2022-10-17 10:29:27,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2022-10-17 10:29:27,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2022-10-17 10:29:27,106 INFO L175 Difference]: Start difference. First operand has 255 places, 247 transitions, 522 flow. Second operand 4 states and 1015 transitions. [2022-10-17 10:29:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 247 transitions, 554 flow [2022-10-17 10:29:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 247 transitions, 531 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-10-17 10:29:27,115 INFO L231 Difference]: Finished difference. Result has 246 places, 245 transitions, 505 flow [2022-10-17 10:29:27,116 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=505, PETRI_PLACES=246, PETRI_TRANSITIONS=245} [2022-10-17 10:29:27,117 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-10-17 10:29:27,117 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 245 transitions, 505 flow [2022-10-17 10:29:27,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 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) [2022-10-17 10:29:27,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:27,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:27,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:29:27,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1617079602, now seen corresponding path program 1 times [2022-10-17 10:29:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:27,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819621293] [2022-10-17 10:29:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819621293] [2022-10-17 10:29:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819621293] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:27,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037846805] [2022-10-17 10:29:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:27,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:27,315 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 274 [2022-10-17 10:29:27,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 245 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 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) [2022-10-17 10:29:27,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:27,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 274 [2022-10-17 10:29:27,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:27,490 INFO L130 PetriNetUnfolder]: 33/527 cut-off events. [2022-10-17 10:29:27,490 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-10-17 10:29:27,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 527 events. 33/527 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1272 event pairs, 2 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 582. Up to 23 conditions per place. [2022-10-17 10:29:27,497 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 10 selfloop transitions, 3 changer transitions 0/249 dead transitions. [2022-10-17 10:29:27,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 249 transitions, 542 flow [2022-10-17 10:29:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2022-10-17 10:29:27,501 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9476885644768857 [2022-10-17 10:29:27,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2022-10-17 10:29:27,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2022-10-17 10:29:27,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:27,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2022-10-17 10:29:27,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 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) [2022-10-17 10:29:27,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2022-10-17 10:29:27,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2022-10-17 10:29:27,510 INFO L175 Difference]: Start difference. First operand has 246 places, 245 transitions, 505 flow. Second operand 3 states and 779 transitions. [2022-10-17 10:29:27,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 249 transitions, 542 flow [2022-10-17 10:29:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 249 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:29:27,519 INFO L231 Difference]: Finished difference. Result has 246 places, 246 transitions, 510 flow [2022-10-17 10:29:27,520 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=246, PETRI_TRANSITIONS=246} [2022-10-17 10:29:27,521 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-10-17 10:29:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 246 transitions, 510 flow [2022-10-17 10:29:27,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 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) [2022-10-17 10:29:27,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:27,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:29:27,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 771775214, now seen corresponding path program 1 times [2022-10-17 10:29:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:27,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819005926] [2022-10-17 10:29:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:27,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:27,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:27,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819005926] [2022-10-17 10:29:27,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819005926] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:27,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:27,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182580648] [2022-10-17 10:29:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:27,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:27,651 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 274 [2022-10-17 10:29:27,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 246 transitions, 510 flow. Second operand has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 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) [2022-10-17 10:29:27,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:27,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 274 [2022-10-17 10:29:27,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:28,004 INFO L130 PetriNetUnfolder]: 51/836 cut-off events. [2022-10-17 10:29:28,004 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-10-17 10:29:28,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 836 events. 51/836 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3005 event pairs, 7 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 940. Up to 27 conditions per place. [2022-10-17 10:29:28,015 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 15 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2022-10-17 10:29:28,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 254 transitions, 573 flow [2022-10-17 10:29:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:29:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:29:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1281 transitions. [2022-10-17 10:29:28,021 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.935036496350365 [2022-10-17 10:29:28,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1281 transitions. [2022-10-17 10:29:28,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1281 transitions. [2022-10-17 10:29:28,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:28,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1281 transitions. [2022-10-17 10:29:28,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 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) [2022-10-17 10:29:28,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 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) [2022-10-17 10:29:28,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 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) [2022-10-17 10:29:28,035 INFO L175 Difference]: Start difference. First operand has 246 places, 246 transitions, 510 flow. Second operand 5 states and 1281 transitions. [2022-10-17 10:29:28,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 254 transitions, 573 flow [2022-10-17 10:29:28,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 254 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:28,044 INFO L231 Difference]: Finished difference. Result has 252 places, 249 transitions, 537 flow [2022-10-17 10:29:28,045 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2022-10-17 10:29:28,046 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, -2 predicate places. [2022-10-17 10:29:28,046 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 537 flow [2022-10-17 10:29:28,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 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) [2022-10-17 10:29:28,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:28,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:28,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:29:28,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash -703749757, now seen corresponding path program 1 times [2022-10-17 10:29:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:28,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586731575] [2022-10-17 10:29:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:28,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:30,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586731575] [2022-10-17 10:29:30,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586731575] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:30,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:30,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-10-17 10:29:30,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264074192] [2022-10-17 10:29:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:30,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:29:30,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:29:30,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:29:30,022 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 274 [2022-10-17 10:29:30,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 537 flow. Second operand has 17 states, 17 states have (on average 187.41176470588235) internal successors, (3186), 17 states have internal predecessors, (3186), 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) [2022-10-17 10:29:30,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:30,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 274 [2022-10-17 10:29:30,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:32,610 INFO L130 PetriNetUnfolder]: 1599/6669 cut-off events. [2022-10-17 10:29:32,610 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-10-17 10:29:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 6669 events. 1599/6669 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 58375 event pairs, 1290 based on Foata normal form. 0/6318 useless extension candidates. Maximal degree in co-relation 9616. Up to 2556 conditions per place. [2022-10-17 10:29:32,689 INFO L137 encePairwiseOnDemand]: 258/274 looper letters, 79 selfloop transitions, 20 changer transitions 0/271 dead transitions. [2022-10-17 10:29:32,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 271 transitions, 781 flow [2022-10-17 10:29:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:29:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-10-17 10:29:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2876 transitions. [2022-10-17 10:29:32,702 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6997566909975669 [2022-10-17 10:29:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2876 transitions. [2022-10-17 10:29:32,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2876 transitions. [2022-10-17 10:29:32,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:32,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2876 transitions. [2022-10-17 10:29:32,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 191.73333333333332) internal successors, (2876), 15 states have internal predecessors, (2876), 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) [2022-10-17 10:29:32,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 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) [2022-10-17 10:29:32,730 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 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) [2022-10-17 10:29:32,731 INFO L175 Difference]: Start difference. First operand has 252 places, 249 transitions, 537 flow. Second operand 15 states and 2876 transitions. [2022-10-17 10:29:32,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 271 transitions, 781 flow [2022-10-17 10:29:32,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 781 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:32,744 INFO L231 Difference]: Finished difference. Result has 272 places, 262 transitions, 644 flow [2022-10-17 10:29:32,745 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=644, PETRI_PLACES=272, PETRI_TRANSITIONS=262} [2022-10-17 10:29:32,748 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, 18 predicate places. [2022-10-17 10:29:32,748 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 262 transitions, 644 flow [2022-10-17 10:29:32,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.41176470588235) internal successors, (3186), 17 states have internal predecessors, (3186), 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) [2022-10-17 10:29:32,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:32,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:29:32,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:32,752 INFO L85 PathProgramCache]: Analyzing trace with hash -940168002, now seen corresponding path program 1 times [2022-10-17 10:29:32,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710081692] [2022-10-17 10:29:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:36,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:36,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710081692] [2022-10-17 10:29:36,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710081692] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:36,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:36,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-10-17 10:29:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417655338] [2022-10-17 10:29:36,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 10:29:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 10:29:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:29:36,747 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 274 [2022-10-17 10:29:36,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 262 transitions, 644 flow. Second operand has 27 states, 27 states have (on average 173.92592592592592) internal successors, (4696), 27 states have internal predecessors, (4696), 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) [2022-10-17 10:29:36,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:36,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 274 [2022-10-17 10:29:36,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:41,837 INFO L130 PetriNetUnfolder]: 1457/6029 cut-off events. [2022-10-17 10:29:41,837 INFO L131 PetriNetUnfolder]: For 117/120 co-relation queries the response was YES. [2022-10-17 10:29:41,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8866 conditions, 6029 events. 1457/6029 cut-off events. For 117/120 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 51449 event pairs, 1160 based on Foata normal form. 2/5754 useless extension candidates. Maximal degree in co-relation 8852. Up to 2311 conditions per place. [2022-10-17 10:29:41,921 INFO L137 encePairwiseOnDemand]: 243/274 looper letters, 88 selfloop transitions, 45 changer transitions 0/297 dead transitions. [2022-10-17 10:29:41,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 1004 flow [2022-10-17 10:29:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-17 10:29:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-10-17 10:29:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4778 transitions. [2022-10-17 10:29:41,941 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6458502297918356 [2022-10-17 10:29:41,942 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4778 transitions. [2022-10-17 10:29:41,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4778 transitions. [2022-10-17 10:29:41,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:41,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4778 transitions. [2022-10-17 10:29:41,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 176.96296296296296) internal successors, (4778), 27 states have internal predecessors, (4778), 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) [2022-10-17 10:29:41,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 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) [2022-10-17 10:29:42,001 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 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) [2022-10-17 10:29:42,001 INFO L175 Difference]: Start difference. First operand has 272 places, 262 transitions, 644 flow. Second operand 27 states and 4778 transitions. [2022-10-17 10:29:42,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 1004 flow [2022-10-17 10:29:42,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 297 transitions, 991 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-10-17 10:29:42,016 INFO L231 Difference]: Finished difference. Result has 303 places, 284 transitions, 870 flow [2022-10-17 10:29:42,020 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=870, PETRI_PLACES=303, PETRI_TRANSITIONS=284} [2022-10-17 10:29:42,021 INFO L287 CegarLoopForPetriNet]: 254 programPoint places, 49 predicate places. [2022-10-17 10:29:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 284 transitions, 870 flow [2022-10-17 10:29:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 173.92592592592592) internal successors, (4696), 27 states have internal predecessors, (4696), 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) [2022-10-17 10:29:42,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:42,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:42,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:29:42,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:29:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 984138435, now seen corresponding path program 1 times [2022-10-17 10:29:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:42,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147272568] [2022-10-17 10:29:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147272568] [2022-10-17 10:29:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147272568] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:44,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:44,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-10-17 10:29:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004064540] [2022-10-17 10:29:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:29:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:29:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:29:44,027 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 274 [2022-10-17 10:29:44,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 284 transitions, 870 flow. Second operand has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 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) [2022-10-17 10:29:44,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:44,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 274 [2022-10-17 10:29:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand