./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/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_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1c75e051173a22f60f33f26eab32e0b3a7dcaf46f2d4cc494d0c9d8775c984e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:16,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:16,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:23:16,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:16,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:16,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:16,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:16,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:16,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:16,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:16,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:16,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:16,906 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:16,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:16,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:23:16,908 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:16,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:16,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:16,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:16,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:23:16,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:16,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:23:16,912 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:23:16,912 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:23:16,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:16,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:23:16,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:16,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:16,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:16,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:16,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:16,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:16,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:16,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:23:16,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:16,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:16,918 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:16,919 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:23:16,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:16,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:16,920 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:16,921 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_6b72183d-5a3d-4924-be7b-64e0d345c9f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c75e051173a22f60f33f26eab32e0b3a7dcaf46f2d4cc494d0c9d8775c984e [2023-11-12 02:23:17,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:17,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:17,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:17,251 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:17,254 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:17,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/twostage_3.i [2023-11-12 02:23:20,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:20,850 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:20,850 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/sv-benchmarks/c/pthread/twostage_3.i [2023-11-12 02:23:20,890 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/data/cd171e3e6/edc614e2160d4a57a8fa5b8c5c6006b2/FLAGbef2db8f8 [2023-11-12 02:23:20,909 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/data/cd171e3e6/edc614e2160d4a57a8fa5b8c5c6006b2 [2023-11-12 02:23:20,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:20,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:20,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:20,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:20,926 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:20,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:20" (1/1) ... [2023-11-12 02:23:20,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a50a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:20, skipping insertion in model container [2023-11-12 02:23:20,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:20" (1/1) ... [2023-11-12 02:23:21,020 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:21,842 WARN L1577 CHandler]: Possible shadowing of function lock [2023-11-12 02:23:21,848 WARN L1577 CHandler]: Possible shadowing of function lock [2023-11-12 02:23:21,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:21,865 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:21,958 WARN L1577 CHandler]: Possible shadowing of function lock [2023-11-12 02:23:21,960 WARN L1577 CHandler]: Possible shadowing of function lock [2023-11-12 02:23:21,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:22,097 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:23:22,103 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:22,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22 WrapperNode [2023-11-12 02:23:22,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:22,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:22,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:22,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:22,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,139 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,190 INFO L138 Inliner]: procedures = 374, calls = 62, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 228 [2023-11-12 02:23:22,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:22,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:22,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:22,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:22,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:22,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:22,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:22,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:22,239 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (1/1) ... [2023-11-12 02:23:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:22,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:22,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:22,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b72183d-5a3d-4924-be7b-64e0d345c9f5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2023-11-12 02:23:22,318 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2023-11-12 02:23:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2023-11-12 02:23:22,318 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2023-11-12 02:23:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2023-11-12 02:23:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:23:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:22,321 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 02:23:22,484 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:22,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:22,966 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:22,979 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:22,979 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:23:22,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:22 BoogieIcfgContainer [2023-11-12 02:23:22,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:22,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:22,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:23,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:23,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:20" (1/3) ... [2023-11-12 02:23:23,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77db2b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:23, skipping insertion in model container [2023-11-12 02:23:23,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:22" (2/3) ... [2023-11-12 02:23:23,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77db2b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:23, skipping insertion in model container [2023-11-12 02:23:23,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:22" (3/3) ... [2023-11-12 02:23:23,006 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2023-11-12 02:23:23,015 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:23:23,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:23,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-12 02:23:23,040 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:23:23,175 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:23:23,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,428 INFO L124 PetriNetUnfolderBase]: 43/498 cut-off events. [2023-11-12 02:23:23,428 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:23:23,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 498 events. 43/498 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/425 useless extension candidates. Maximal degree in co-relation 266. Up to 8 conditions per place. [2023-11-12 02:23:23,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:23:23,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 265 transitions, 550 flow [2023-11-12 02:23:23,596 INFO L124 PetriNetUnfolderBase]: 43/498 cut-off events. [2023-11-12 02:23:23,596 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:23:23,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 498 events. 43/498 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/425 useless extension candidates. Maximal degree in co-relation 266. Up to 8 conditions per place. [2023-11-12 02:23:23,616 INFO L119 LiptonReduction]: Number of co-enabled transitions 10242 [2023-11-12 02:23:56,481 WARN L293 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 283 DAG size of output: 276 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-12 02:23:59,605 INFO L134 LiptonReduction]: Checked pairs total: 23783 [2023-11-12 02:23:59,605 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-11-12 02:23:59,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:59,628 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;@60fc1b8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:59,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-12 02:23:59,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:23:59,634 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-12 02:23:59,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:59,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:59,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:23:59,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:23:59,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash 29841100, now seen corresponding path program 1 times [2023-11-12 02:23:59,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:59,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003914742] [2023-11-12 02:23:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:00,223 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 02:24:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003914742] [2023-11-12 02:24:00,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003914742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:00,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:00,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659818940] [2023-11-12 02:24:00,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:00,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:00,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 545 [2023-11-12 02:24:00,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 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 02:24:00,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:00,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 545 [2023-11-12 02:24:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:00,885 INFO L124 PetriNetUnfolderBase]: 1016/1906 cut-off events. [2023-11-12 02:24:00,885 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-12 02:24:00,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3675 conditions, 1906 events. 1016/1906 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12229 event pairs, 526 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 3067. Up to 995 conditions per place. [2023-11-12 02:24:00,903 INFO L140 encePairwiseOnDemand]: 528/545 looper letters, 54 selfloop transitions, 9 changer transitions 2/74 dead transitions. [2023-11-12 02:24:00,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 310 flow [2023-11-12 02:24:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2023-11-12 02:24:00,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47217125382263 [2023-11-12 02:24:00,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2023-11-12 02:24:00,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2023-11-12 02:24:00,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:00,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2023-11-12 02:24:00,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 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 02:24:00,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 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 02:24:00,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 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 02:24:00,958 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 120 flow. Second operand 3 states and 772 transitions. [2023-11-12 02:24:00,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 310 flow [2023-11-12 02:24:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:24:00,967 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 172 flow [2023-11-12 02:24:00,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-11-12 02:24:00,973 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-12 02:24:00,974 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 172 flow [2023-11-12 02:24:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 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 02:24:00,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:00,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:24:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:24:00,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:24:00,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1387447401, now seen corresponding path program 1 times [2023-11-12 02:24:00,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973913487] [2023-11-12 02:24:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:01,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:24:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:01,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:24:01,176 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:24:01,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-11-12 02:24:01,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2023-11-12 02:24:01,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-11-12 02:24:01,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-11-12 02:24:01,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-11-12 02:24:01,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-11-12 02:24:01,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-11-12 02:24:01,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-11-12 02:24:01,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-11-12 02:24:01,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2023-11-12 02:24:01,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2023-11-12 02:24:01,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2023-11-12 02:24:01,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-11-12 02:24:01,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-11-12 02:24:01,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-11-12 02:24:01,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-11-12 02:24:01,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-11-12 02:24:01,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-11-12 02:24:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:24:01,199 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:24:01,203 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:24:01,206 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:24:01,282 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-12 02:24:01,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,604 INFO L124 PetriNetUnfolderBase]: 163/1529 cut-off events. [2023-11-12 02:24:01,604 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-12 02:24:01,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 1529 events. 163/1529 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 9208 event pairs, 1 based on Foata normal form. 0/1287 useless extension candidates. Maximal degree in co-relation 897. Up to 32 conditions per place. [2023-11-12 02:24:01,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:24:01,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 319 transitions, 682 flow [2023-11-12 02:24:01,946 INFO L124 PetriNetUnfolderBase]: 163/1529 cut-off events. [2023-11-12 02:24:01,946 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-12 02:24:01,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 1529 events. 163/1529 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 9208 event pairs, 1 based on Foata normal form. 0/1287 useless extension candidates. Maximal degree in co-relation 897. Up to 32 conditions per place. [2023-11-12 02:24:02,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 26016