./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:48,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:48,162 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:08:48,168 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:48,169 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:48,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:48,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:48,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:48,197 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:48,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:48,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:48,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:48,201 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:48,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:48,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:08:48,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:48,204 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:48,204 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:48,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:48,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:08:48,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:48,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:08:48,208 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:48,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:08:48,209 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:48,210 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:48,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:48,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:48,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:48,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:48,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:48,213 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:08:48,214 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:48,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:48,214 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:48,215 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:08:48,215 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:48,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:48,216 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:48,217 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_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc [2023-11-12 02:08:48,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:48,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:48,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:48,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:48,507 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:48,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-12 02:08:51,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:51,902 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:51,902 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-12 02:08:51,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/data/6ed56f41b/6e1f52c6c3eb4f94b674a8e7d3edfc6f/FLAG8852e5d50 [2023-11-12 02:08:51,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/data/6ed56f41b/6e1f52c6c3eb4f94b674a8e7d3edfc6f [2023-11-12 02:08:51,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:51,953 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:51,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:51,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:51,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:51,963 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:51" (1/1) ... [2023-11-12 02:08:51,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1272f90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:51, skipping insertion in model container [2023-11-12 02:08:51,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:51" (1/1) ... [2023-11-12 02:08:52,021 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:52,387 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_647890f9-df0d-4039-a005-861006b46ca3/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-11-12 02:08:52,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:52,412 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:52,458 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_647890f9-df0d-4039-a005-861006b46ca3/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-11-12 02:08:52,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:52,508 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:52,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52 WrapperNode [2023-11-12 02:08:52,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:52,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:52,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:52,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:52,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,566 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 187 [2023-11-12 02:08:52,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:52,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:52,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:52,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:52,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,606 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:52,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:52,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:52,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:52,608 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (1/1) ... [2023-11-12 02:08:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:52,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:52,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_647890f9-df0d-4039-a005-861006b46ca3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:08:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:08:52,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:08:52,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:08:52,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:08:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:08:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:52,697 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:08:52,915 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:52,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:53,279 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:53,552 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:53,553 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:08:53,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:53 BoogieIcfgContainer [2023-11-12 02:08:53,556 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:53,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:53,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:53,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:53,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:51" (1/3) ... [2023-11-12 02:08:53,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ac8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:53, skipping insertion in model container [2023-11-12 02:08:53,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:52" (2/3) ... [2023-11-12 02:08:53,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ac8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:53, skipping insertion in model container [2023-11-12 02:08:53,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:53" (3/3) ... [2023-11-12 02:08:53,571 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-11-12 02:08:53,586 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:08:53,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:53,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:08:53,600 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:08:53,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:08:53,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,872 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-11-12 02:08:53,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:53,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 133 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-11-12 02:08:53,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:53,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,916 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 117 transitions, 238 flow [2023-11-12 02:08:53,971 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-11-12 02:08:53,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:53,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 133 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-11-12 02:08:53,980 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-11-12 02:08:57,951 INFO L134 LiptonReduction]: Checked pairs total: 2476 [2023-11-12 02:08:57,951 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-11-12 02:08:57,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:57,988 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=LoopHeads, 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;@55ebb39b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:57,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:08:57,993 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:08:57,993 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-12 02:08:57,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:57,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:57,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:08:57,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1623828518, now seen corresponding path program 1 times [2023-11-12 02:08:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:58,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738919735] [2023-11-12 02:08:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:58,148 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:08:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:58,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:08:58,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:08:58,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 02:08:58,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 02:08:58,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 02:08:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:08:58,222 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:08:58,227 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:08:58,228 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:08:58,315 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:08:58,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,386 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-12 02:08:58,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:08:58,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 449 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 175. Up to 6 conditions per place. [2023-11-12 02:08:58,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,394 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:58,394 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 199 transitions, 408 flow [2023-11-12 02:08:58,438 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-12 02:08:58,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:08:58,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 449 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 175. Up to 6 conditions per place. [2023-11-12 02:08:58,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 17820 [2023-11-12 02:09:04,162 INFO L134 LiptonReduction]: Checked pairs total: 36750 [2023-11-12 02:09:04,163 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-11-12 02:09:04,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:09:04,167 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=LoopHeads, 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;@55ebb39b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:09:04,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:09:04,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:09:04,173 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-11-12 02:09:04,173 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:09:04,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:04,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:09:04,174 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)] === [2023-11-12 02:09:04,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash -267343577, now seen corresponding path program 1 times [2023-11-12 02:09:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:04,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040701265] [2023-11-12 02:09:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:04,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:09:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:04,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:09:04,240 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:09:04,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 02:09:04,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 02:09:04,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 02:09:04,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 02:09:04,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:09:04,243 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:09:04,243 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:09:04,244 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:09:04,315 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:09:04,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,389 INFO L124 PetriNetUnfolderBase]: 31/318 cut-off events. [2023-11-12 02:09:04,389 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:09:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 31/318 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 872 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 256. Up to 8 conditions per place. [2023-11-12 02:09:04,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:09:04,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 281 transitions, 580 flow [2023-11-12 02:09:04,474 INFO L124 PetriNetUnfolderBase]: 31/318 cut-off events. [2023-11-12 02:09:04,474 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:09:04,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 31/318 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 872 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 256. Up to 8 conditions per place. [2023-11-12 02:09:04,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 46656 [2023-11-12 02:09:11,486 INFO L134 LiptonReduction]: Checked pairs total: 87817 [2023-11-12 02:09:11,487 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-12 02:09:11,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:09:11,491 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=LoopHeads, 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;@55ebb39b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:09:11,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:09:11,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:09:11,500 INFO L124 PetriNetUnfolderBase]: 8/60 cut-off events. [2023-11-12 02:09:11,500 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:09:11,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:11,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:11,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:09:11,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash -112177473, now seen corresponding path program 1 times [2023-11-12 02:09:11,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:11,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572448755] [2023-11-12 02:09:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:11,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:11,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:11,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572448755] [2023-11-12 02:09:11,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572448755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:11,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:09:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352070679] [2023-11-12 02:09:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:11,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:11,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 516 [2023-11-12 02:09:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 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) [2023-11-12 02:09:11,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:09:11,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 516 [2023-11-12 02:09:11,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:09:21,238 INFO L124 PetriNetUnfolderBase]: 43680/62818 cut-off events. [2023-11-12 02:09:21,238 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2023-11-12 02:09:21,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122180 conditions, 62818 events. 43680/62818 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 445477 event pairs, 8325 based on Foata normal form. 162/51905 useless extension candidates. Maximal degree in co-relation 75816. Up to 41784 conditions per place. [2023-11-12 02:09:21,790 INFO L140 encePairwiseOnDemand]: 498/516 looper letters, 214 selfloop transitions, 13 changer transitions 0/248 dead transitions. [2023-11-12 02:09:21,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 248 transitions, 999 flow [2023-11-12 02:09:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:09:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:09:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1407 transitions. [2023-11-12 02:09:21,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453488372093023 [2023-11-12 02:09:21,821 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1407 transitions. [2023-11-12 02:09:21,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1407 transitions. [2023-11-12 02:09:21,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:09:21,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1407 transitions. [2023-11-12 02:09:21,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.4) internal successors, (1407), 5 states have internal predecessors, (1407), 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) [2023-11-12 02:09:21,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 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) [2023-11-12 02:09:21,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 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) [2023-11-12 02:09:21,859 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 212 flow. Second operand 5 states and 1407 transitions. [2023-11-12 02:09:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 248 transitions, 999 flow [2023-11-12 02:09:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 248 transitions, 991 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-12 02:09:21,877 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 308 flow [2023-11-12 02:09:21,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2023-11-12 02:09:21,884 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2023-11-12 02:09:21,885 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 308 flow [2023-11-12 02:09:21,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 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) [2023-11-12 02:09:21,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:21,886 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:09:21,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:09:21,887 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)] === [2023-11-12 02:09:21,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1673582861, now seen corresponding path program 1 times [2023-11-12 02:09:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289248760] [2023-11-12 02:09:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:21,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:09:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:21,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:09:21,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:09:21,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:09:21,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:09:21,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:09:21,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:09:21,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:09:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:09:21,947 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:09:21,948 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:09:21,948 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:09:22,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:09:22,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,128 INFO L124 PetriNetUnfolderBase]: 41/413 cut-off events. [2023-11-12 02:09:22,128 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:09:22,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 413 events. 41/413 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1371 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 337. Up to 10 conditions per place. [2023-11-12 02:09:22,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:09:22,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 363 transitions, 754 flow [2023-11-12 02:09:22,247 INFO L124 PetriNetUnfolderBase]: 41/413 cut-off events. [2023-11-12 02:09:22,247 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:09:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 413 events. 41/413 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1371 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 337. Up to 10 conditions per place. [2023-11-12 02:09:22,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 88776 [2023-11-12 02:09:31,293 INFO L134 LiptonReduction]: Checked pairs total: 172369 [2023-11-12 02:09:31,295 INFO L136 LiptonReduction]: Total number of compositions: 300 [2023-11-12 02:09:31,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:09:31,310 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=LoopHeads, 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;@55ebb39b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:09:31,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:09:31,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:09:31,320 INFO L124 PetriNetUnfolderBase]: 7/58 cut-off events. [2023-11-12 02:09:31,320 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-12 02:09:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:31,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:31,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-12 02:09:31,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -607138650, now seen corresponding path program 1 times [2023-11-12 02:09:31,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:31,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692981074] [2023-11-12 02:09:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:31,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:31,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:31,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692981074] [2023-11-12 02:09:31,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692981074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:31,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:09:31,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389505754] [2023-11-12 02:09:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:31,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 663 [2023-11-12 02:09:31,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 301.25) internal successors, (1205), 4 states have internal predecessors, (1205), 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) [2023-11-12 02:09:31,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:09:31,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 663 [2023-11-12 02:09:31,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand