./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP --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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:42,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:42,667 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:25:42,674 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:42,674 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:42,703 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:42,704 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:42,705 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:42,706 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:42,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:42,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:42,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:42,709 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:42,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:42,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:42,711 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:42,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:42,712 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:42,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:42,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:42,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:42,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:42,716 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:42,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:42,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:42,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:42,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:42,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:42,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:42,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:42,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:42,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:42,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:42,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:42,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:42,723 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:42,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:42,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:42,724 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:42,725 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2023-11-06 22:25:43,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:43,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:43,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:43,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:43,099 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:43,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-06 22:25:46,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:46,653 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:46,654 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-06 22:25:46,681 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/data/31841fc57/345074c5042e4c49a0af9f2f16b68af8/FLAG591673e09 [2023-11-06 22:25:46,718 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/data/31841fc57/345074c5042e4c49a0af9f2f16b68af8 [2023-11-06 22:25:46,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:46,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:46,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:46,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:46,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:46,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:46" (1/1) ... [2023-11-06 22:25:46,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b2ef81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:46, skipping insertion in model container [2023-11-06 22:25:46,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:46" (1/1) ... [2023-11-06 22:25:46,792 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:47,187 WARN L240 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_6ddb6222-941d-4f3e-868a-0a06d75aff4c/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-11-06 22:25:47,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:47,231 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:47,268 WARN L240 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_6ddb6222-941d-4f3e-868a-0a06d75aff4c/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-11-06 22:25:47,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:47,327 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:47,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47 WrapperNode [2023-11-06 22:25:47,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:47,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:47,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:47,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:47,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,353 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,382 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-06 22:25:47,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:47,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:47,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:47,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:47,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,408 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:47,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:47,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:47,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:47,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (1/1) ... [2023-11-06 22:25:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:47,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:47,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ddb6222-941d-4f3e-868a-0a06d75aff4c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:25:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:25:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:25:47,513 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:25:47,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:47,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:47,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:47,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:47,517 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:25:47,665 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:47,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:47,944 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:47,954 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:47,954 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-06 22:25:47,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:47 BoogieIcfgContainer [2023-11-06 22:25:47,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:47,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:47,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:47,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:47,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:46" (1/3) ... [2023-11-06 22:25:47,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5838055f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:47, skipping insertion in model container [2023-11-06 22:25:47,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:47" (2/3) ... [2023-11-06 22:25:47,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5838055f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:47, skipping insertion in model container [2023-11-06 22:25:47,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:47" (3/3) ... [2023-11-06 22:25:47,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-06 22:25:48,014 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:25:48,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:48,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:25:48,029 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:25:48,157 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:25:48,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 128 transitions, 263 flow [2023-11-06 22:25:48,389 INFO L124 PetriNetUnfolderBase]: 30/188 cut-off events. [2023-11-06 22:25:48,390 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:25:48,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 566 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-06 22:25:48,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 128 transitions, 263 flow [2023-11-06 22:25:48,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 123 transitions, 250 flow [2023-11-06 22:25:48,416 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:48,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 123 transitions, 250 flow [2023-11-06 22:25:48,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 123 transitions, 250 flow [2023-11-06 22:25:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 250 flow [2023-11-06 22:25:48,499 INFO L124 PetriNetUnfolderBase]: 29/183 cut-off events. [2023-11-06 22:25:48,500 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 183 events. 29/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 550 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-06 22:25:48,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-11-06 22:25:51,434 INFO L134 LiptonReduction]: Checked pairs total: 11169 [2023-11-06 22:25:51,435 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-11-06 22:25:51,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:51,465 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;@27785607, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:51,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:25:51,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:51,476 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-06 22:25:51,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:51,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:51,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:25:51,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:25:51,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash 463581885, now seen corresponding path program 1 times [2023-11-06 22:25:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704371851] [2023-11-06 22:25:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:51,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704371851] [2023-11-06 22:25:51,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704371851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:51,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:51,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091971327] [2023-11-06 22:25:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:51,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:51,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 220 [2023-11-06 22:25:51,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-11-06 22:25:51,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 220 [2023-11-06 22:25:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:52,031 INFO L124 PetriNetUnfolderBase]: 161/376 cut-off events. [2023-11-06 22:25:52,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:52,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 376 events. 161/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1584 event pairs, 75 based on Foata normal form. 69/404 useless extension candidates. Maximal degree in co-relation 697. Up to 321 conditions per place. [2023-11-06 22:25:52,037 INFO L140 encePairwiseOnDemand]: 202/220 looper letters, 33 selfloop transitions, 2 changer transitions 4/48 dead transitions. [2023-11-06 22:25:52,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 178 flow [2023-11-06 22:25:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-06 22:25:52,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556060606060606 [2023-11-06 22:25:52,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-06 22:25:52,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-06 22:25:52,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:52,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-06 22:25:52,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2023-11-06 22:25:52,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-11-06 22:25:52,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-11-06 22:25:52,088 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 108 flow. Second operand 3 states and 367 transitions. [2023-11-06 22:25:52,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 178 flow [2023-11-06 22:25:52,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:52,094 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 78 flow [2023-11-06 22:25:52,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-06 22:25:52,101 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-06 22:25:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 78 flow [2023-11-06 22:25:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-11-06 22:25:52,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:52,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:25:52,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:52,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:25:52,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1500992761, now seen corresponding path program 1 times [2023-11-06 22:25:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:52,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429264131] [2023-11-06 22:25:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:52,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:52,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:52,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:52,184 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:25:52,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:25:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:25:52,187 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:52,190 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:52,190 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:25:52,217 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:25:52,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,270 INFO L124 PetriNetUnfolderBase]: 51/307 cut-off events. [2023-11-06 22:25:52,271 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:25:52,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 307 events. 51/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1064 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2023-11-06 22:25:52,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:52,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 161 transitions, 338 flow [2023-11-06 22:25:52,326 INFO L124 PetriNetUnfolderBase]: 51/307 cut-off events. [2023-11-06 22:25:52,327 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:25:52,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 307 events. 51/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1064 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2023-11-06 22:25:52,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 10788 [2023-11-06 22:25:55,200 INFO L134 LiptonReduction]: Checked pairs total: 32033 [2023-11-06 22:25:55,201 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-11-06 22:25:55,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:55,214 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;@27785607, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:55,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:25:55,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:55,218 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-06 22:25:55,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:55,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:55,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:25:55,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:25:55,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 752556251, now seen corresponding path program 1 times [2023-11-06 22:25:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:55,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085703840] [2023-11-06 22:25:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085703840] [2023-11-06 22:25:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085703840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:55,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:55,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291425111] [2023-11-06 22:25:55,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:55,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:55,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:55,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 270 [2023-11-06 22:25:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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) [2023-11-06 22:25:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 270 [2023-11-06 22:25:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:56,104 INFO L124 PetriNetUnfolderBase]: 3002/5059 cut-off events. [2023-11-06 22:25:56,105 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-06 22:25:56,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9749 conditions, 5059 events. 3002/5059 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 32549 event pairs, 1260 based on Foata normal form. 1207/5807 useless extension candidates. Maximal degree in co-relation 1480. Up to 4630 conditions per place. [2023-11-06 22:25:56,139 INFO L140 encePairwiseOnDemand]: 247/270 looper letters, 41 selfloop transitions, 2 changer transitions 9/69 dead transitions. [2023-11-06 22:25:56,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 256 flow [2023-11-06 22:25:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-11-06 22:25:56,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-06 22:25:56,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-11-06 22:25:56,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-11-06 22:25:56,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:56,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-11-06 22:25:56,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2023-11-06 22:25:56,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-11-06 22:25:56,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-11-06 22:25:56,151 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 174 flow. Second operand 3 states and 459 transitions. [2023-11-06 22:25:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 256 flow [2023-11-06 22:25:56,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:56,154 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 122 flow [2023-11-06 22:25:56,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-06 22:25:56,156 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-11-06 22:25:56,156 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 122 flow [2023-11-06 22:25:56,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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) [2023-11-06 22:25:56,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:56,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:25:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:25:56,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:25:56,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1455074357, now seen corresponding path program 1 times [2023-11-06 22:25:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:56,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222167072] [2023-11-06 22:25:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:56,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:56,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:56,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:56,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:25:56,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:25:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:25:56,207 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:56,208 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:56,208 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:25:56,234 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:25:56,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,305 INFO L124 PetriNetUnfolderBase]: 77/461 cut-off events. [2023-11-06 22:25:56,305 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:25:56,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 77/461 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1741 event pairs, 1 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-11-06 22:25:56,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:56,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 194 transitions, 415 flow [2023-11-06 22:25:56,444 INFO L124 PetriNetUnfolderBase]: 77/461 cut-off events. [2023-11-06 22:25:56,445 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:25:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 77/461 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1741 event pairs, 1 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-11-06 22:25:56,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 19344 [2023-11-06 22:25:59,604 INFO L134 LiptonReduction]: Checked pairs total: 63773 [2023-11-06 22:25:59,604 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-11-06 22:25:59,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:59,613 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;@27785607, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:59,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:25:59,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:59,617 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-06 22:25:59,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:59,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:59,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:25:59,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:25:59,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1086433923, now seen corresponding path program 1 times [2023-11-06 22:25:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:59,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963641158] [2023-11-06 22:25:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:59,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:59,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963641158] [2023-11-06 22:25:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963641158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:59,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:59,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915207830] [2023-11-06 22:25:59,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:59,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 317 [2023-11-06 22:25:59,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2023-11-06 22:25:59,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:59,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 317 [2023-11-06 22:25:59,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:06,143 INFO L124 PetriNetUnfolderBase]: 34432/50948 cut-off events. [2023-11-06 22:26:06,144 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-11-06 22:26:06,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98314 conditions, 50948 events. 34432/50948 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 379833 event pairs, 19617 based on Foata normal form. 9598/57557 useless extension candidates. Maximal degree in co-relation 9001. Up to 46808 conditions per place. [2023-11-06 22:26:06,484 INFO L140 encePairwiseOnDemand]: 288/317 looper letters, 49 selfloop transitions, 2 changer transitions 10/86 dead transitions. [2023-11-06 22:26:06,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 319 flow [2023-11-06 22:26:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-06 22:26:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772870662460567 [2023-11-06 22:26:06,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-06 22:26:06,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-06 22:26:06,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:06,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-06 22:26:06,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-06 22:26:06,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:26:06,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:26:06,495 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 231 flow. Second operand 3 states and 549 transitions. [2023-11-06 22:26:06,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 319 flow [2023-11-06 22:26:06,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 319 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:26:06,508 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 162 flow [2023-11-06 22:26:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-11-06 22:26:06,509 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-11-06 22:26:06,509 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 162 flow [2023-11-06 22:26:06,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2023-11-06 22:26:06,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:06,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:26:06,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:26:06,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:26:06,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,511 INFO L85 PathProgramCache]: Analyzing trace with hash -904046276, now seen corresponding path program 1 times [2023-11-06 22:26:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991632831] [2023-11-06 22:26:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:06,561 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:26:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:06,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:26:06,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:26:06,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:26:06,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:26:06,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:26:06,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:26:06,586 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:26:06,586 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:26:06,635 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:26:06,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,748 INFO L124 PetriNetUnfolderBase]: 115/687 cut-off events. [2023-11-06 22:26:06,748 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:26:06,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 687 events. 115/687 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2885 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-11-06 22:26:06,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:06,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 227 transitions, 494 flow [2023-11-06 22:26:06,864 INFO L124 PetriNetUnfolderBase]: 115/687 cut-off events. [2023-11-06 22:26:06,864 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:26:06,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 687 events. 115/687 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2885 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-11-06 22:26:06,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 30008 [2023-11-06 22:26:10,177 INFO L134 LiptonReduction]: Checked pairs total: 91340 [2023-11-06 22:26:10,177 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-06 22:26:10,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:10,180 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;@27785607, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:10,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:26:10,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:10,183 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-06 22:26:10,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:10,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:10,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:26:10,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:26:10,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1469054026, now seen corresponding path program 1 times [2023-11-06 22:26:10,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:10,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635849434] [2023-11-06 22:26:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:10,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635849434] [2023-11-06 22:26:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635849434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:10,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:10,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:10,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871919002] [2023-11-06 22:26:10,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:10,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:10,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 368 [2023-11-06 22:26:10,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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) [2023-11-06 22:26:10,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 368 [2023-11-06 22:26:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand