./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.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_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/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_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/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_d697883d-5372-46f5-8a03-e0f835e3f2ed/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 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b --- 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 10:57:28,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:57:28,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:57:28,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:57:28,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:57:28,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:57:28,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:57:28,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:57:28,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:57:28,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:57:28,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:57:28,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:57:28,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:57:28,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:57:28,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:57:28,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:57:28,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:57:28,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:57:28,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:57:28,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:57:28,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:57:28,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:57:28,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:57:28,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:57:28,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:57:28,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:57:28,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:57:28,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:57:28,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:57:28,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:57:28,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:57:28,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:57:28,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:57:28,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:57:28,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:57:28,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:57:28,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:57:28,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:57:28,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:57:28,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:57:28,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:57:28,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:57:28,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:57:28,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:57:28,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:57:28,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:57:28,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:57:28,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:57:28,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:57:28,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:57:28,557 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:57:28,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:57:28,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:57:28,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:57:28,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:57:28,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:57:28,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:57:28,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:57:28,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:57:28,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:57:28,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:57:28,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:57:28,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:57:28,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:57:28,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:57:28,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:57:28,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:57:28,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:57:28,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:57:28,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:57:28,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:57:28,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:57:28,562 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:57:28,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:57:28,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:57:28,563 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_d697883d-5372-46f5-8a03-e0f835e3f2ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b [2022-10-17 10:57:28,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:57:28,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:57:28,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:57:28,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:57:28,854 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:57:28,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i [2022-10-17 10:57:28,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/data/64bbf9480/b18a780233b44e2aae9500d1fd5e4f1a/FLAG1f36e2bd0 [2022-10-17 10:57:29,487 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:57:29,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i [2022-10-17 10:57:29,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/data/64bbf9480/b18a780233b44e2aae9500d1fd5e4f1a/FLAG1f36e2bd0 [2022-10-17 10:57:29,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/data/64bbf9480/b18a780233b44e2aae9500d1fd5e4f1a [2022-10-17 10:57:29,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:57:29,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:57:29,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:57:29,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:57:29,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:57:29,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:57:29" (1/1) ... [2022-10-17 10:57:29,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc2a9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:29, skipping insertion in model container [2022-10-17 10:57:29,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:57:29" (1/1) ... [2022-10-17 10:57:29,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:57:29,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:57:30,381 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_d697883d-5372-46f5-8a03-e0f835e3f2ed/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2022-10-17 10:57:30,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:57:30,424 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:57:30,464 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_d697883d-5372-46f5-8a03-e0f835e3f2ed/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2022-10-17 10:57:30,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:57:30,544 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:57:30,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30 WrapperNode [2022-10-17 10:57:30,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:57:30,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:57:30,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:57:30,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:57:30,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,622 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 204 [2022-10-17 10:57:30,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:57:30,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:57:30,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:57:30,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:57:30,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:57:30,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:57:30,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:57:30,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:57:30,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (1/1) ... [2022-10-17 10:57:30,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:57:30,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:57:30,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:57:30,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697883d-5372-46f5-8a03-e0f835e3f2ed/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:57:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:57:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:57:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-10-17 10:57:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-10-17 10:57:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:57:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:57:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-10-17 10:57:30,803 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-10-17 10:57:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:57:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:57:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:57:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:57:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:57:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:57:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:57:30,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:57:30,807 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 10:57:31,050 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:57:31,052 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:57:31,400 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:57:31,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:57:31,411 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-10-17 10:57:31,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:57:31 BoogieIcfgContainer [2022-10-17 10:57:31,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:57:31,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:57:31,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:57:31,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:57:31,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:57:29" (1/3) ... [2022-10-17 10:57:31,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747f032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:57:31, skipping insertion in model container [2022-10-17 10:57:31,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:57:30" (2/3) ... [2022-10-17 10:57:31,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747f032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:57:31, skipping insertion in model container [2022-10-17 10:57:31,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:57:31" (3/3) ... [2022-10-17 10:57:31,428 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2022-10-17 10:57:31,437 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:57:31,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:57:31,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:57:31,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:57:31,607 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-10-17 10:57:31,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 462 flow [2022-10-17 10:57:31,871 INFO L130 PetriNetUnfolder]: 52/414 cut-off events. [2022-10-17 10:57:31,872 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-10-17 10:57:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 414 events. 52/414 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1647 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2022-10-17 10:57:31,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 220 transitions, 462 flow [2022-10-17 10:57:31,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 218 transitions, 452 flow [2022-10-17 10:57:31,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:57:31,912 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;@5515c57b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:57:31,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:57:31,941 INFO L130 PetriNetUnfolder]: 9/128 cut-off events. [2022-10-17 10:57:31,941 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:57:31,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:31,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:31,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:57:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 621174435, now seen corresponding path program 1 times [2022-10-17 10:57:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:31,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943157038] [2022-10-17 10:57:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:32,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:57:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:32,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:57:32,317 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:57:32,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 10:57:32,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 10:57:32,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-10-17 10:57:32,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 10:57:32,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:57:32,322 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 10:57:32,326 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:57:32,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:57:32,431 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-10-17 10:57:32,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 340 transitions, 728 flow [2022-10-17 10:57:32,915 INFO L130 PetriNetUnfolder]: 191/1219 cut-off events. [2022-10-17 10:57:32,915 INFO L131 PetriNetUnfolder]: For 72/100 co-relation queries the response was YES. [2022-10-17 10:57:32,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 1219 events. 191/1219 cut-off events. For 72/100 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 7622 event pairs, 2 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 769. Up to 32 conditions per place. [2022-10-17 10:57:32,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 340 transitions, 728 flow [2022-10-17 10:57:32,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 340 transitions, 728 flow [2022-10-17 10:57:32,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:57:32,972 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;@5515c57b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:57:32,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 10:57:33,017 INFO L130 PetriNetUnfolder]: 19/264 cut-off events. [2022-10-17 10:57:33,018 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:57:33,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:33,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:33,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 10:57:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1276034956, now seen corresponding path program 1 times [2022-10-17 10:57:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:33,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945641776] [2022-10-17 10:57:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:33,114 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:57:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:33,165 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:57:33,166 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:57:33,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 10:57:33,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 10:57:33,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-10-17 10:57:33,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 10:57:33,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 10:57:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:57:33,169 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 10:57:33,169 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:57:33,171 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:57:33,277 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-10-17 10:57:33,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 412 places, 460 transitions, 998 flow [2022-10-17 10:57:34,793 INFO L130 PetriNetUnfolder]: 664/3388 cut-off events. [2022-10-17 10:57:34,793 INFO L131 PetriNetUnfolder]: For 419/475 co-relation queries the response was YES. [2022-10-17 10:57:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3839 conditions, 3388 events. 664/3388 cut-off events. For 419/475 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 26197 event pairs, 64 based on Foata normal form. 0/2886 useless extension candidates. Maximal degree in co-relation 2215. Up to 192 conditions per place. [2022-10-17 10:57:34,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 412 places, 460 transitions, 998 flow [2022-10-17 10:57:34,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 412 places, 460 transitions, 998 flow [2022-10-17 10:57:34,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:57:34,995 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5515c57b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:57:34,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 10:57:35,159 INFO L130 PetriNetUnfolder]: 44/516 cut-off events. [2022-10-17 10:57:35,159 INFO L131 PetriNetUnfolder]: For 22/37 co-relation queries the response was YES. [2022-10-17 10:57:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:35,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:57:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1807325972, now seen corresponding path program 1 times [2022-10-17 10:57:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:35,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243183557] [2022-10-17 10:57:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:35,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:57:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:35,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:57:35,313 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:57:35,313 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-10-17 10:57:35,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-10-17 10:57:35,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-10-17 10:57:35,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-10-17 10:57:35,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-10-17 10:57:35,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-10-17 10:57:35,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:57:35,315 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 10:57:35,316 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:57:35,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 10:57:35,427 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-10-17 10:57:35,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 517 places, 580 transitions, 1272 flow [2022-10-17 10:57:41,249 INFO L130 PetriNetUnfolder]: 2659/10701 cut-off events. [2022-10-17 10:57:41,250 INFO L131 PetriNetUnfolder]: For 2144/2239 co-relation queries the response was YES. [2022-10-17 10:57:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 10701 events. 2659/10701 cut-off events. For 2144/2239 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 98775 event pairs, 626 based on Foata normal form. 0/9268 useless extension candidates. Maximal degree in co-relation 6876. Up to 1024 conditions per place. [2022-10-17 10:57:42,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 517 places, 580 transitions, 1272 flow [2022-10-17 10:57:42,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 517 places, 580 transitions, 1272 flow [2022-10-17 10:57:42,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:57:42,503 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;@5515c57b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:57:42,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 10:57:42,601 INFO L130 PetriNetUnfolder]: 47/544 cut-off events. [2022-10-17 10:57:42,601 INFO L131 PetriNetUnfolder]: For 25/39 co-relation queries the response was YES. [2022-10-17 10:57:42,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:42,602 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] [2022-10-17 10:57:42,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:57:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash 777546482, now seen corresponding path program 1 times [2022-10-17 10:57:42,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596486290] [2022-10-17 10:57:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:57:42,781 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 10:57:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:57:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596486290] [2022-10-17 10:57:42,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596486290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:57:42,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:57:42,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:57:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131236917] [2022-10-17 10:57:42,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:57:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:57:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:57:42,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:57:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:57:42,854 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 580 [2022-10-17 10:57:42,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 580 transitions, 1272 flow. Second operand has 2 states, 2 states have (on average 501.5) internal successors, (1003), 2 states have internal predecessors, (1003), 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 10:57:42,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:57:42,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 580 [2022-10-17 10:57:42,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:57:48,982 INFO L130 PetriNetUnfolder]: 1877/9899 cut-off events. [2022-10-17 10:57:48,982 INFO L131 PetriNetUnfolder]: For 6521/7880 co-relation queries the response was YES. [2022-10-17 10:57:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14137 conditions, 9899 events. 1877/9899 cut-off events. For 6521/7880 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 96241 event pairs, 313 based on Foata normal form. 12824/22032 useless extension candidates. Maximal degree in co-relation 7271. Up to 2073 conditions per place. [2022-10-17 10:57:49,866 INFO L137 encePairwiseOnDemand]: 528/580 looper letters, 24 selfloop transitions, 0 changer transitions 0/524 dead transitions. [2022-10-17 10:57:49,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 524 transitions, 1208 flow [2022-10-17 10:57:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:57:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:57:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1076 transitions. [2022-10-17 10:57:49,895 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9275862068965517 [2022-10-17 10:57:49,896 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1076 transitions. [2022-10-17 10:57:49,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1076 transitions. [2022-10-17 10:57:49,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:57:49,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1076 transitions. [2022-10-17 10:57:49,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 538.0) internal successors, (1076), 2 states have internal predecessors, (1076), 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 10:57:49,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 580.0) internal successors, (1740), 3 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:57:49,927 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 580.0) internal successors, (1740), 3 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:57:49,929 INFO L175 Difference]: Start difference. First operand has 517 places, 580 transitions, 1272 flow. Second operand 2 states and 1076 transitions. [2022-10-17 10:57:49,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 524 transitions, 1208 flow [2022-10-17 10:57:49,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 524 transitions, 1208 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:57:49,971 INFO L231 Difference]: Finished difference. Result has 514 places, 524 transitions, 1160 flow [2022-10-17 10:57:49,974 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=580, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1160, PETRI_PLACES=514, PETRI_TRANSITIONS=524} [2022-10-17 10:57:49,981 INFO L287 CegarLoopForPetriNet]: 517 programPoint places, -3 predicate places. [2022-10-17 10:57:49,981 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 524 transitions, 1160 flow [2022-10-17 10:57:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 501.5) internal successors, (1003), 2 states have internal predecessors, (1003), 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 10:57:49,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:49,983 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] [2022-10-17 10:57:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:57:49,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:57:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash 44425500, now seen corresponding path program 1 times [2022-10-17 10:57:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:49,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251126688] [2022-10-17 10:57:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:49,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:57:50,171 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 10:57:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:57:50,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251126688] [2022-10-17 10:57:50,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251126688] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:57:50,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:57:50,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:57:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93746413] [2022-10-17 10:57:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:57:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:57:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:57:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:57:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:57:50,177 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 580 [2022-10-17 10:57:50,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 524 transitions, 1160 flow. Second operand has 3 states, 3 states have (on average 494.3333333333333) internal successors, (1483), 3 states have internal predecessors, (1483), 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 10:57:50,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:57:50,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 580 [2022-10-17 10:57:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:57:54,614 INFO L130 PetriNetUnfolder]: 1860/9545 cut-off events. [2022-10-17 10:57:54,615 INFO L131 PetriNetUnfolder]: For 6471/7978 co-relation queries the response was YES. [2022-10-17 10:57:55,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 9545 events. 1860/9545 cut-off events. For 6471/7978 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 92349 event pairs, 324 based on Foata normal form. 2/8889 useless extension candidates. Maximal degree in co-relation 13775. Up to 2088 conditions per place. [2022-10-17 10:57:55,939 INFO L137 encePairwiseOnDemand]: 577/580 looper letters, 33 selfloop transitions, 2 changer transitions 0/528 dead transitions. [2022-10-17 10:57:55,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 528 transitions, 1238 flow [2022-10-17 10:57:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:57:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:57:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1515 transitions. [2022-10-17 10:57:55,945 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8706896551724138 [2022-10-17 10:57:55,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1515 transitions. [2022-10-17 10:57:55,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1515 transitions. [2022-10-17 10:57:55,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:57:55,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1515 transitions. [2022-10-17 10:57:55,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 505.0) internal successors, (1515), 3 states have internal predecessors, (1515), 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 10:57:55,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 580.0) internal successors, (2320), 4 states have internal predecessors, (2320), 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 10:57:55,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 580.0) internal successors, (2320), 4 states have internal predecessors, (2320), 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 10:57:55,966 INFO L175 Difference]: Start difference. First operand has 514 places, 524 transitions, 1160 flow. Second operand 3 states and 1515 transitions. [2022-10-17 10:57:55,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 528 transitions, 1238 flow [2022-10-17 10:57:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 528 transitions, 1238 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:57:55,994 INFO L231 Difference]: Finished difference. Result has 517 places, 525 transitions, 1172 flow [2022-10-17 10:57:55,995 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=580, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1172, PETRI_PLACES=517, PETRI_TRANSITIONS=525} [2022-10-17 10:57:55,997 INFO L287 CegarLoopForPetriNet]: 517 programPoint places, 0 predicate places. [2022-10-17 10:57:55,998 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 525 transitions, 1172 flow [2022-10-17 10:57:55,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 494.3333333333333) internal successors, (1483), 3 states have internal predecessors, (1483), 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 10:57:55,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:57:56,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:57:56,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:57:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:57:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 918640571, now seen corresponding path program 1 times [2022-10-17 10:57:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:57:56,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016241867] [2022-10-17 10:57:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:57:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:57:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:56,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:57:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:57:56,139 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:57:56,139 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:57:56,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-10-17 10:57:56,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-10-17 10:57:56,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-10-17 10:57:56,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-10-17 10:57:56,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-10-17 10:57:56,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-10-17 10:57:56,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-10-17 10:57:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:57:56,141 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:57:56,142 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:57:56,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-10-17 10:57:56,285 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-10-17 10:57:56,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 622 places, 700 transitions, 1550 flow