./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu --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 d76df1bfaca9781352b9c7afbe4683f5e649e880008edad8122f422eebb0dbe8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:53:40,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:53:40,392 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:53:40,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:53:40,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:53:40,423 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:53:40,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:53:40,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:53:40,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:53:40,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:53:40,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:53:40,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:53:40,428 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:53:40,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:53:40,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:53:40,430 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:53:40,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:53:40,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:53:40,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:53:40,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:53:40,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:53:40,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:53:40,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:53:40,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:53:40,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:53:40,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:53:40,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:53:40,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:53:40,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:40,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:53:40,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:53:40,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:53:40,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:53:40,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:53:40,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:53:40,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:53:40,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:53:40,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:53:40,443 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:53:40,444 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_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d76df1bfaca9781352b9c7afbe4683f5e649e880008edad8122f422eebb0dbe8 [2023-11-19 07:53:40,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:53:40,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:53:40,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:53:40,732 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:53:40,733 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:53:40,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-19 07:53:43,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:53:44,204 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:53:44,209 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-19 07:53:44,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/data/283948c25/591317f434734c68acd098c86a632bd2/FLAG2c8101e88 [2023-11-19 07:53:44,249 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/data/283948c25/591317f434734c68acd098c86a632bd2 [2023-11-19 07:53:44,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:53:44,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:53:44,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:44,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:53:44,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:53:44,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:44,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544372d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44, skipping insertion in model container [2023-11-19 07:53:44,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:44,351 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:53:44,769 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_2186718a-bc8c-42a8-81c8-c09df7038ffb/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-19 07:53:44,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:44,798 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:53:44,852 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_2186718a-bc8c-42a8-81c8-c09df7038ffb/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-19 07:53:44,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:44,910 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:53:44,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44 WrapperNode [2023-11-19 07:53:44,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:44,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:44,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:53:44,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:53:44,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:44,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:44,973 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-19 07:53:44,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:44,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:53:44,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:53:44,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:53:44,986 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:44,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,008 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:53:45,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:53:45,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:53:45,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:53:45,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (1/1) ... [2023-11-19 07:53:45,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:45,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:53:45,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2186718a-bc8c-42a8-81c8-c09df7038ffb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:53:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:53:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:53:45,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:53:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:53:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:53:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:53:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:53:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:53:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:53:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:53:45,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:53:45,115 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:53:45,266 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:53:45,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:53:45,451 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:53:45,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:53:45,506 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:53:45,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:45 BoogieIcfgContainer [2023-11-19 07:53:45,511 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:53:45,513 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:53:45,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:53:45,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:53:45,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:53:44" (1/3) ... [2023-11-19 07:53:45,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438263da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:45, skipping insertion in model container [2023-11-19 07:53:45,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:44" (2/3) ... [2023-11-19 07:53:45,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438263da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:45, skipping insertion in model container [2023-11-19 07:53:45,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:45" (3/3) ... [2023-11-19 07:53:45,521 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2023-11-19 07:53:45,531 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:53:45,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:53:45,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:53:45,543 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:53:45,603 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:53:45,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,706 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-11-19 07:53:45,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:53:45,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 93 events. 7/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2023-11-19 07:53:45,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:45,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 168 flow [2023-11-19 07:53:45,773 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-11-19 07:53:45,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:53:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 93 events. 7/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2023-11-19 07:53:45,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 1344 [2023-11-19 07:53:47,861 INFO L134 LiptonReduction]: Checked pairs total: 1728 [2023-11-19 07:53:47,861 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-11-19 07:53:47,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:47,906 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;@752ad755, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:47,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:53:47,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:53:47,923 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-19 07:53:47,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:53:47,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:47,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:53:47,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1962497340, now seen corresponding path program 1 times [2023-11-19 07:53:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:47,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747873581] [2023-11-19 07:53:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:48,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:53:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:48,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:53:48,160 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:53:48,161 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:53:48,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:53:48,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:53:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:53:48,165 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 07:53:48,176 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:53:48,177 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:53:48,238 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:53:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,317 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-19 07:53:48,317 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:53:48,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 155 events. 13/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 344 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-19 07:53:48,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:48,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 131 transitions, 272 flow [2023-11-19 07:53:48,375 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-19 07:53:48,375 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:53:48,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 155 events. 13/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 344 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-19 07:53:48,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 7392 [2023-11-19 07:53:50,422 INFO L134 LiptonReduction]: Checked pairs total: 16669 [2023-11-19 07:53:50,422 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-19 07:53:50,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:50,427 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;@752ad755, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:50,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:53:50,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:53:50,432 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-19 07:53:50,432 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:53:50,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:50,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:53:50,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 192050224, now seen corresponding path program 1 times [2023-11-19 07:53:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:50,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673294747] [2023-11-19 07:53:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:50,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:50,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673294747] [2023-11-19 07:53:50,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673294747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:50,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:50,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:53:50,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971732007] [2023-11-19 07:53:50,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:50,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:53:50,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:53:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:50,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 238 [2023-11-19 07:53:50,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 118.5) internal successors, (237), 2 states have internal predecessors, (237), 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) [2023-11-19 07:53:50,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:53:50,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 238 [2023-11-19 07:53:50,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:53:50,800 INFO L124 PetriNetUnfolderBase]: 379/784 cut-off events. [2023-11-19 07:53:50,800 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-19 07:53:50,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 784 events. 379/784 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4172 event pairs, 333 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1079. Up to 642 conditions per place. [2023-11-19 07:53:50,809 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 24 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2023-11-19 07:53:50,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 140 flow [2023-11-19 07:53:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:53:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:53:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 260 transitions. [2023-11-19 07:53:50,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462184873949579 [2023-11-19 07:53:50,832 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 260 transitions. [2023-11-19 07:53:50,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 260 transitions. [2023-11-19 07:53:50,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:53:50,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 260 transitions. [2023-11-19 07:53:50,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 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) [2023-11-19 07:53:50,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 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) [2023-11-19 07:53:50,850 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 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) [2023-11-19 07:53:50,853 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 110 flow. Second operand 2 states and 260 transitions. [2023-11-19 07:53:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 140 flow [2023-11-19 07:53:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:53:50,860 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-11-19 07:53:50,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-19 07:53:50,868 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-11-19 07:53:50,869 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-11-19 07:53:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 118.5) internal successors, (237), 2 states have internal predecessors, (237), 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) [2023-11-19 07:53:50,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:50,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:53:50,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:53:50,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:53:50,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1800210960, now seen corresponding path program 1 times [2023-11-19 07:53:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782249602] [2023-11-19 07:53:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:50,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:50,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:53:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:50,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:53:50,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:53:50,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:53:50,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:53:50,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:53:50,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:53:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:53:50,992 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:53:50,993 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:53:50,993 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:53:51,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:53:51,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,065 INFO L124 PetriNetUnfolderBase]: 19/217 cut-off events. [2023-11-19 07:53:51,066 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:53:51,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 19/217 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-11-19 07:53:51,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:51,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 180 transitions, 378 flow [2023-11-19 07:53:51,107 INFO L124 PetriNetUnfolderBase]: 19/217 cut-off events. [2023-11-19 07:53:51,107 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:53:51,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 19/217 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-11-19 07:53:51,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 18144 [2023-11-19 07:53:53,678 INFO L134 LiptonReduction]: Checked pairs total: 44189 [2023-11-19 07:53:53,678 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-19 07:53:53,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:53,686 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;@752ad755, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:53,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:53:53,694 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:53:53,694 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-11-19 07:53:53,695 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:53:53,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:53,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:53,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:53:53,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 177134093, now seen corresponding path program 1 times [2023-11-19 07:53:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:53,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586817932] [2023-11-19 07:53:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:53,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586817932] [2023-11-19 07:53:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586817932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:53,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:53,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:53:53,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109263808] [2023-11-19 07:53:53,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:53,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:53:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:53:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 324 [2023-11-19 07:53:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 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) [2023-11-19 07:53:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:53:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 324 [2023-11-19 07:53:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:53:55,811 INFO L124 PetriNetUnfolderBase]: 9162/14635 cut-off events. [2023-11-19 07:53:55,811 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2023-11-19 07:53:55,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28212 conditions, 14635 events. 9162/14635 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 102288 event pairs, 8248 based on Foata normal form. 288/13536 useless extension candidates. Maximal degree in co-relation 12521. Up to 12911 conditions per place. [2023-11-19 07:53:55,939 INFO L140 encePairwiseOnDemand]: 316/324 looper letters, 38 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2023-11-19 07:53:55,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 214 flow [2023-11-19 07:53:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:53:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:53:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 360 transitions. [2023-11-19 07:53:55,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-19 07:53:55,942 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 360 transitions. [2023-11-19 07:53:55,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 360 transitions. [2023-11-19 07:53:55,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:53:55,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 360 transitions. [2023-11-19 07:53:55,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 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) [2023-11-19 07:53:55,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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) [2023-11-19 07:53:55,953 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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) [2023-11-19 07:53:55,954 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 160 flow. Second operand 2 states and 360 transitions. [2023-11-19 07:53:55,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 214 flow [2023-11-19 07:53:55,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 212 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:53:55,959 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 136 flow [2023-11-19 07:53:55,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-11-19 07:53:55,961 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-19 07:53:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 136 flow [2023-11-19 07:53:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 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) [2023-11-19 07:53:55,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:55,962 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:53:55,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:53:55,963 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)] === [2023-11-19 07:53:55,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash -612155289, now seen corresponding path program 1 times [2023-11-19 07:53:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:55,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149828096] [2023-11-19 07:53:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:55,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:55,995 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:53:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:53:56,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:53:56,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:53:56,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:53:56,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:53:56,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:53:56,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:53:56,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:53:56,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:53:56,111 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:53:56,112 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:53:56,112 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:53:56,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:53:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,226 INFO L124 PetriNetUnfolderBase]: 25/279 cut-off events. [2023-11-19 07:53:56,226 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:53:56,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 279 events. 25/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 916 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 10 conditions per place. [2023-11-19 07:53:56,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:56,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 229 transitions, 486 flow [2023-11-19 07:53:56,287 INFO L124 PetriNetUnfolderBase]: 25/279 cut-off events. [2023-11-19 07:53:56,288 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:53:56,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 279 events. 25/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 916 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 10 conditions per place. [2023-11-19 07:53:56,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 33600 [2023-11-19 07:53:59,194 INFO L134 LiptonReduction]: Checked pairs total: 93045 [2023-11-19 07:53:59,195 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-19 07:53:59,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:59,198 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;@752ad755, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:59,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:53:59,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:53:59,202 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-19 07:53:59,202 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:53:59,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:53:59,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:59,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:53:59,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 532114492, now seen corresponding path program 1 times [2023-11-19 07:53:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:59,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750462328] [2023-11-19 07:53:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:59,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:59,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750462328] [2023-11-19 07:53:59,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750462328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:59,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:53:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117523110] [2023-11-19 07:53:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:53:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:53:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 412 [2023-11-19 07:53:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 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) [2023-11-19 07:53:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:53:59,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 412 [2023-11-19 07:53:59,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:23,958 INFO L124 PetriNetUnfolderBase]: 154210/214093 cut-off events. [2023-11-19 07:54:23,958 INFO L125 PetriNetUnfolderBase]: For 19228/19228 co-relation queries the response was YES. [2023-11-19 07:54:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422287 conditions, 214093 events. 154210/214093 cut-off events. For 19228/19228 co-relation queries the response was YES. Maximal size of possible extension queue 4384. Compared 1617994 event pairs, 139520 based on Foata normal form. 3437/195623 useless extension candidates. Maximal degree in co-relation 41711. Up to 198944 conditions per place. [2023-11-19 07:54:26,006 INFO L140 encePairwiseOnDemand]: 401/412 looper letters, 50 selfloop transitions, 0 changer transitions 0/78 dead transitions. [2023-11-19 07:54:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 284 flow [2023-11-19 07:54:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:54:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:54:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 459 transitions. [2023-11-19 07:54:26,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570388349514563 [2023-11-19 07:54:26,008 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 459 transitions. [2023-11-19 07:54:26,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 459 transitions. [2023-11-19 07:54:26,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:26,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 459 transitions. [2023-11-19 07:54:26,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 412.0) internal successors, (1236), 3 states have internal predecessors, (1236), 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) [2023-11-19 07:54:26,015 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 412.0) internal successors, (1236), 3 states have internal predecessors, (1236), 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) [2023-11-19 07:54:26,016 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 216 flow. Second operand 2 states and 459 transitions. [2023-11-19 07:54:26,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 284 flow [2023-11-19 07:54:26,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 78 transitions, 278 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:26,037 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 178 flow [2023-11-19 07:54:26,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-11-19 07:54:26,038 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2023-11-19 07:54:26,039 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 178 flow [2023-11-19 07:54:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 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) [2023-11-19 07:54:26,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:26,039 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:26,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:54:26,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:54:26,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash 248291979, now seen corresponding path program 1 times [2023-11-19 07:54:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280107223] [2023-11-19 07:54:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:26,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:54:26,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:54:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:54:26,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:54:26,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:54:26,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:54:26,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:54:26,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 07:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:54:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:54:26,126 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:54:26,128 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:54:26,128 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:54:26,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:54:26,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,259 INFO L124 PetriNetUnfolderBase]: 31/341 cut-off events. [2023-11-19 07:54:26,259 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:54:26,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 341 events. 31/341 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1211 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2023-11-19 07:54:26,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:26,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 278 transitions, 596 flow [2023-11-19 07:54:26,333 INFO L124 PetriNetUnfolderBase]: 31/341 cut-off events. [2023-11-19 07:54:26,333 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:54:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 341 events. 31/341 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1211 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2023-11-19 07:54:26,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 53760 [2023-11-19 07:54:29,659 INFO L134 LiptonReduction]: Checked pairs total: 149856 [2023-11-19 07:54:29,659 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-11-19 07:54:29,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:29,663 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;@752ad755, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:29,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:54:29,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:29,666 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-19 07:54:29,667 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:29,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:29,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:29,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:54:29,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -550506936, now seen corresponding path program 1 times [2023-11-19 07:54:29,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50224165] [2023-11-19 07:54:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:29,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:29,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50224165] [2023-11-19 07:54:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50224165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:29,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:29,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:29,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006118752] [2023-11-19 07:54:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:29,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:54:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:54:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:54:29,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 497 [2023-11-19 07:54:29,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 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) [2023-11-19 07:54:29,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:29,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 497 [2023-11-19 07:54:29,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand