./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/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_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/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_6e1df1fd-011f-4e9a-9ffa-df849e584ded/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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:10:54,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:10:54,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:10:54,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:10:54,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:10:54,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:10:54,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:10:54,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:10:54,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:10:54,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:10:54,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:10:54,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:10:54,871 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:10:54,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:10:54,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:10:54,873 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:10:54,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:10:54,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:10:54,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:10:54,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:10:54,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:10:54,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:10:54,876 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:10:54,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:10:54,877 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:10:54,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:10:54,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:10:54,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:10:54,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:54,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:10:54,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:10:54,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:10:54,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:10:54,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:10:54,881 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:10:54,881 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:10:54,881 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:10:54,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:10:54,882 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:10:54,882 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_6e1df1fd-011f-4e9a-9ffa-df849e584ded/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2023-11-06 22:10:55,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:10:55,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:10:55,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:10:55,146 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:10:55,147 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:10:55,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-06 22:10:58,371 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:58,719 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:58,722 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-06 22:10:58,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/data/372de0207/d4e99c98b127470cbc29b87ea17c75a5/FLAG0a4d4562b [2023-11-06 22:10:58,768 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/data/372de0207/d4e99c98b127470cbc29b87ea17c75a5 [2023-11-06 22:10:58,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:58,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:58,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:58,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:58,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:58,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:58" (1/1) ... [2023-11-06 22:10:58,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d1a645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:58, skipping insertion in model container [2023-11-06 22:10:58,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:58" (1/1) ... [2023-11-06 22:10:58,854 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:59,239 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_6e1df1fd-011f-4e9a-9ffa-df849e584ded/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-11-06 22:10:59,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:59,259 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:59,297 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_6e1df1fd-011f-4e9a-9ffa-df849e584ded/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-11-06 22:10:59,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:59,340 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:59,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59 WrapperNode [2023-11-06 22:10:59,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:59,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:59,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:59,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:59,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,409 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 101 [2023-11-06 22:10:59,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:59,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:59,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:59,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:59,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,423 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,423 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,430 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,449 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:59,450 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:59,450 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:59,450 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:59,451 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (1/1) ... [2023-11-06 22:10:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:59,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:59,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e1df1fd-011f-4e9a-9ffa-df849e584ded/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:10:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:10:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:10:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:10:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:10:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:10:59,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:59,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:59,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:59,540 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 22:10:59,676 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:59,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:59,976 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:11:00,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:11:00,068 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:11:00,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:00 BoogieIcfgContainer [2023-11-06 22:11:00,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:11:00,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:11:00,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:11:00,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:11:00,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:58" (1/3) ... [2023-11-06 22:11:00,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b8346a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:00, skipping insertion in model container [2023-11-06 22:11:00,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:59" (2/3) ... [2023-11-06 22:11:00,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b8346a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:00, skipping insertion in model container [2023-11-06 22:11:00,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:00" (3/3) ... [2023-11-06 22:11:00,080 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-11-06 22:11:00,090 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:11:00,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:11:00,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:11:00,102 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:11:00,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:11:00,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,250 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-11-06 22:11:00,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:11:00,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 104 events. 10/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-11-06 22:11:00,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:11:00,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 93 transitions, 190 flow [2023-11-06 22:11:00,305 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-11-06 22:11:00,305 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:11:00,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 104 events. 10/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-11-06 22:11:00,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 1792 [2023-11-06 22:11:02,278 INFO L134 LiptonReduction]: Checked pairs total: 2283 [2023-11-06 22:11:02,279 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-11-06 22:11:02,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:02,311 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;@64b36b14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:02,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:11:02,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:11:02,317 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-06 22:11:02,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:11:02,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:02,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:11:02,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:02,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 675826440, now seen corresponding path program 1 times [2023-11-06 22:11:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167552066] [2023-11-06 22:11:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:02,494 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:11:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:02,562 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:11:02,564 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:11:02,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:11:02,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:11:02,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:11:02,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:11:02,570 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-06 22:11:02,574 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:11:02,575 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:11:02,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:11:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,727 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-11-06 22:11:02,727 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:11:02,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 182 events. 19/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 441 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-11-06 22:11:02,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:11:02,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 158 transitions, 326 flow [2023-11-06 22:11:02,793 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-11-06 22:11:02,793 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:11:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 182 events. 19/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 441 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-11-06 22:11:02,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 11904 [2023-11-06 22:11:04,942 INFO L134 LiptonReduction]: Checked pairs total: 21969 [2023-11-06 22:11:04,943 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-06 22:11:04,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:04,952 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;@64b36b14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:04,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:11:04,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:11:04,962 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-11-06 22:11:04,962 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:11:04,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:04,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:11:04,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:11:04,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash -567450783, now seen corresponding path program 1 times [2023-11-06 22:11:04,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:04,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902240848] [2023-11-06 22:11:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:04,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:05,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:11:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:05,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:11:05,039 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:11:05,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:11:05,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:11:05,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:11:05,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:11:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:11:05,041 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-06 22:11:05,043 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:11:05,043 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:11:05,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:11:05,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,161 INFO L124 PetriNetUnfolderBase]: 28/260 cut-off events. [2023-11-06 22:11:05,162 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:11:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 260 events. 28/260 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 828 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-11-06 22:11:05,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:11:05,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 223 transitions, 464 flow [2023-11-06 22:11:05,221 INFO L124 PetriNetUnfolderBase]: 28/260 cut-off events. [2023-11-06 22:11:05,221 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:11:05,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 260 events. 28/260 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 828 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-11-06 22:11:05,247 INFO L119 LiptonReduction]: Number of co-enabled transitions 30336 [2023-11-06 22:11:07,891 INFO L134 LiptonReduction]: Checked pairs total: 58979 [2023-11-06 22:11:07,891 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-11-06 22:11:07,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:07,895 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;@64b36b14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:07,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:11:07,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:11:07,901 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2023-11-06 22:11:07,901 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:11:07,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:07,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:07,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:11:07,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1549284591, now seen corresponding path program 1 times [2023-11-06 22:11:07,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:07,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454091289] [2023-11-06 22:11:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:07,987 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 22:11:07,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454091289] [2023-11-06 22:11:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454091289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716659212] [2023-11-06 22:11:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:11:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:11:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:11:08,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 404 [2023-11-06 22:11:08,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 196.0) internal successors, (392), 2 states have internal predecessors, (392), 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 22:11:08,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:08,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 404 [2023-11-06 22:11:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:12,999 INFO L124 PetriNetUnfolderBase]: 26136/36135 cut-off events. [2023-11-06 22:11:13,000 INFO L125 PetriNetUnfolderBase]: For 1732/1732 co-relation queries the response was YES. [2023-11-06 22:11:13,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72671 conditions, 36135 events. 26136/36135 cut-off events. For 1732/1732 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 218437 event pairs, 21135 based on Foata normal form. 0/31008 useless extension candidates. Maximal degree in co-relation 37319. Up to 35394 conditions per place. [2023-11-06 22:11:13,270 INFO L140 encePairwiseOnDemand]: 395/404 looper letters, 57 selfloop transitions, 0 changer transitions 0/69 dead transitions. [2023-11-06 22:11:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 270 flow [2023-11-06 22:11:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:11:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:11:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 448 transitions. [2023-11-06 22:11:13,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544554455445545 [2023-11-06 22:11:13,298 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 448 transitions. [2023-11-06 22:11:13,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 448 transitions. [2023-11-06 22:11:13,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:13,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 448 transitions. [2023-11-06 22:11:13,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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 22:11:13,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 404.0) internal successors, (1212), 3 states have internal predecessors, (1212), 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 22:11:13,319 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 404.0) internal successors, (1212), 3 states have internal predecessors, (1212), 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 22:11:13,321 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 182 flow. Second operand 2 states and 448 transitions. [2023-11-06 22:11:13,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 270 flow [2023-11-06 22:11:13,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 268 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:11:13,333 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 154 flow [2023-11-06 22:11:13,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2023-11-06 22:11:13,341 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2023-11-06 22:11:13,341 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 154 flow [2023-11-06 22:11:13,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 196.0) internal successors, (392), 2 states have internal predecessors, (392), 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 22:11:13,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:13,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:11:13,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:11:13,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:11:13,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2091285681, now seen corresponding path program 1 times [2023-11-06 22:11:13,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:13,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220828827] [2023-11-06 22:11:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:13,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:11:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:11:13,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:11:13,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:11:13,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:11:13,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:11:13,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:11:13,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:11:13,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:11:13,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:11:13,439 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:11:13,440 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:11:13,440 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:11:13,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:11:13,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,589 INFO L124 PetriNetUnfolderBase]: 37/338 cut-off events. [2023-11-06 22:11:13,589 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:11:13,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 338 events. 37/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1225 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 269. Up to 10 conditions per place. [2023-11-06 22:11:13,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:11:13,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 288 transitions, 604 flow [2023-11-06 22:11:13,754 INFO L124 PetriNetUnfolderBase]: 37/338 cut-off events. [2023-11-06 22:11:13,754 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:11:13,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 338 events. 37/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1225 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 269. Up to 10 conditions per place. [2023-11-06 22:11:13,781 INFO L119 LiptonReduction]: Number of co-enabled transitions 57088 [2023-11-06 22:11:16,932 INFO L134 LiptonReduction]: Checked pairs total: 119100 [2023-11-06 22:11:16,932 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-11-06 22:11:16,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:16,940 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;@64b36b14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:16,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:11:16,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:11:16,944 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-11-06 22:11:16,946 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:11:16,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:16,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:16,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:11:16,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:16,947 INFO L85 PathProgramCache]: Analyzing trace with hash 150830266, now seen corresponding path program 1 times [2023-11-06 22:11:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:16,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284675257] [2023-11-06 22:11:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:17,029 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 22:11:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:17,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284675257] [2023-11-06 22:11:17,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284675257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:17,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418203489] [2023-11-06 22:11:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:11:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:11:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:11:17,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 526 [2023-11-06 22:11:17,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 254 flow. Second operand has 2 states, 2 states have (on average 251.0) internal successors, (502), 2 states have internal predecessors, (502), 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 22:11:17,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:17,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 526 [2023-11-06 22:11:17,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand