./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 06:51:56,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 06:51:56,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 06:51:56,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 06:51:56,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 06:51:56,825 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 06:51:56,826 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 06:51:56,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 06:51:56,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 06:51:56,827 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 06:51:56,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 06:51:56,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 06:51:56,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 06:51:56,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 06:51:56,829 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 06:51:56,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 06:51:56,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 06:51:56,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 06:51:56,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 06:51:56,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 06:51:56,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 06:51:56,831 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 06:51:56,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 06:51:56,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 06:51:56,832 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 06:51:56,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 06:51:56,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 06:51:56,833 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 06:51:56,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 06:51:56,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 06:51:56,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 06:51:56,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 06:51:56,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:51:56,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 06:51:56,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 06:51:56,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 06:51:56,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 06:51:56,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 06:51:56,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 06:51:56,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 06:51:56,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 06:51:56,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 06:51:56,837 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2024-10-13 06:51:57,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 06:51:57,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 06:51:57,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 06:51:57,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 06:51:57,066 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 06:51:57,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-10-13 06:51:58,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 06:51:58,804 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 06:51:58,805 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-10-13 06:51:58,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272a49868/910b326c8339473aaec97bf4c364fb9f/FLAGb35c0cb3e [2024-10-13 06:51:58,836 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272a49868/910b326c8339473aaec97bf4c364fb9f [2024-10-13 06:51:58,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 06:51:58,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 06:51:58,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 06:51:58,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 06:51:58,846 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 06:51:58,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:51:58" (1/1) ... [2024-10-13 06:51:58,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35dd24c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:58, skipping insertion in model container [2024-10-13 06:51:58,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:51:58" (1/1) ... [2024-10-13 06:51:58,901 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 06:51:59,130 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2024-10-13 06:51:59,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:51:59,147 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 06:51:59,198 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2024-10-13 06:51:59,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:51:59,236 INFO L204 MainTranslator]: Completed translation [2024-10-13 06:51:59,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59 WrapperNode [2024-10-13 06:51:59,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 06:51:59,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 06:51:59,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 06:51:59,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 06:51:59,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,276 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 78 [2024-10-13 06:51:59,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 06:51:59,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 06:51:59,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 06:51:59,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 06:51:59,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,303 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,316 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-13 06:51:59,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,326 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,327 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,329 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 06:51:59,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 06:51:59,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 06:51:59,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 06:51:59,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (1/1) ... [2024-10-13 06:51:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:51:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:51:59,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 06:51:59,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 06:51:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-13 06:51:59,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-13 06:51:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 06:51:59,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 06:51:59,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 06:51:59,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 06:51:59,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 06:51:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 06:51:59,464 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 06:51:59,581 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 06:51:59,583 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 06:51:59,722 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 06:51:59,722 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 06:51:59,856 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 06:51:59,857 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 06:51:59,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:51:59 BoogieIcfgContainer [2024-10-13 06:51:59,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 06:51:59,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 06:51:59,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 06:51:59,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 06:51:59,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:51:58" (1/3) ... [2024-10-13 06:51:59,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500d80d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:51:59, skipping insertion in model container [2024-10-13 06:51:59,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:51:59" (2/3) ... [2024-10-13 06:51:59,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500d80d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:51:59, skipping insertion in model container [2024-10-13 06:51:59,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:51:59" (3/3) ... [2024-10-13 06:51:59,865 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2024-10-13 06:51:59,880 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 06:51:59,880 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 06:51:59,880 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 06:51:59,908 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:51:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 54 flow [2024-10-13 06:51:59,961 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-10-13 06:51:59,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:51:59,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 51 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-10-13 06:51:59,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 54 flow [2024-10-13 06:51:59,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 22 transitions, 51 flow [2024-10-13 06:51:59,974 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:51:59,980 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:51:59,981 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 06:51:59,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:51:59,986 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-13 06:51:59,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:51:59,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:51:59,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:51:59,988 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 06:51:59,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:51:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash 78026650, now seen corresponding path program 1 times [2024-10-13 06:52:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:00,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569933308] [2024-10-13 06:52:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569933308] [2024-10-13 06:52:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569933308] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92499224] [2024-10-13 06:52:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:00,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:00,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-10-13 06:52:00,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-13 06:52:00,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:00,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-10-13 06:52:00,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:00,490 INFO L124 PetriNetUnfolderBase]: 99/188 cut-off events. [2024-10-13 06:52:00,492 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 188 events. 99/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 681 event pairs, 27 based on Foata normal form. 53/237 useless extension candidates. Maximal degree in co-relation 352. Up to 106 conditions per place. [2024-10-13 06:52:00,497 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 16 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-10-13 06:52:00,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 91 flow [2024-10-13 06:52:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-10-13 06:52:00,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-10-13 06:52:00,510 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 51 flow. Second operand 3 states and 47 transitions. [2024-10-13 06:52:00,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 91 flow [2024-10-13 06:52:00,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:00,515 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 54 flow [2024-10-13 06:52:00,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2024-10-13 06:52:00,520 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-10-13 06:52:00,521 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 54 flow [2024-10-13 06:52:00,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-13 06:52:00,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:00,522 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:00,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 06:52:00,523 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 06:52:00,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2127158844, now seen corresponding path program 1 times [2024-10-13 06:52:00,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:00,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323318913] [2024-10-13 06:52:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:00,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:00,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:00,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:00,581 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:00,583 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-13 06:52:00,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-13 06:52:00,587 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-10-13 06:52:00,588 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-13 06:52:00,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 06:52:00,588 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 06:52:00,591 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:00,591 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 06:52:00,611 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:00,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 39 transitions, 98 flow [2024-10-13 06:52:00,623 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-10-13 06:52:00,623 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:52:00,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 33 events. 4/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 40. Up to 3 conditions per place. [2024-10-13 06:52:00,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 39 transitions, 98 flow [2024-10-13 06:52:00,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 28 transitions, 69 flow [2024-10-13 06:52:00,630 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:00,630 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:00,631 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 06:52:00,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:00,638 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-13 06:52:00,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:52:00,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:00,639 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:00,639 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:52:00,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:00,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1918895415, now seen corresponding path program 1 times [2024-10-13 06:52:00,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:00,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188024483] [2024-10-13 06:52:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:00,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:00,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188024483] [2024-10-13 06:52:00,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188024483] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:00,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:00,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609868941] [2024-10-13 06:52:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:00,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:00,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-10-13 06:52:00,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-10-13 06:52:00,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:00,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-10-13 06:52:00,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:00,939 INFO L124 PetriNetUnfolderBase]: 693/1036 cut-off events. [2024-10-13 06:52:00,939 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-10-13 06:52:00,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1036 events. 693/1036 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4504 event pairs, 138 based on Foata normal form. 224/1252 useless extension candidates. Maximal degree in co-relation 2064. Up to 814 conditions per place. [2024-10-13 06:52:00,951 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-10-13 06:52:00,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 132 flow [2024-10-13 06:52:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-10-13 06:52:00,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-10-13 06:52:00,954 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 69 flow. Second operand 3 states and 71 transitions. [2024-10-13 06:52:00,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 132 flow [2024-10-13 06:52:00,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:00,956 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 77 flow [2024-10-13 06:52:00,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-10-13 06:52:00,957 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2024-10-13 06:52:00,958 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 77 flow [2024-10-13 06:52:00,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-10-13 06:52:00,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:00,958 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:00,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 06:52:00,959 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 06:52:00,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1391252147, now seen corresponding path program 1 times [2024-10-13 06:52:00,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:00,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793301736] [2024-10-13 06:52:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:00,972 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:00,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:00,985 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:00,985 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-13 06:52:00,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-13 06:52:00,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-10-13 06:52:00,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-13 06:52:00,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-13 06:52:00,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 06:52:00,987 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 06:52:00,988 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:00,988 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 06:52:01,020 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:01,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 146 flow [2024-10-13 06:52:01,031 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2024-10-13 06:52:01,031 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 06:52:01,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 42 events. 5/42 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2024-10-13 06:52:01,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 146 flow [2024-10-13 06:52:01,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 89 flow [2024-10-13 06:52:01,033 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:01,035 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:01,035 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-13 06:52:01,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:01,038 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-13 06:52:01,038 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:01,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:01,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:01,039 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:01,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1261877933, now seen corresponding path program 1 times [2024-10-13 06:52:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239555759] [2024-10-13 06:52:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239555759] [2024-10-13 06:52:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239555759] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:01,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820655131] [2024-10-13 06:52:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:01,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:01,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-13 06:52:01,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-13 06:52:01,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:01,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-13 06:52:01,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:01,540 INFO L124 PetriNetUnfolderBase]: 3801/5056 cut-off events. [2024-10-13 06:52:01,541 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-10-13 06:52:01,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10320 conditions, 5056 events. 3801/5056 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23099 event pairs, 723 based on Foata normal form. 862/5892 useless extension candidates. Maximal degree in co-relation 10308. Up to 4510 conditions per place. [2024-10-13 06:52:01,571 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 28 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-13 06:52:01,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 177 flow [2024-10-13 06:52:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-10-13 06:52:01,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-10-13 06:52:01,574 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 89 flow. Second operand 3 states and 95 transitions. [2024-10-13 06:52:01,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 177 flow [2024-10-13 06:52:01,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 172 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:01,578 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 100 flow [2024-10-13 06:52:01,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-13 06:52:01,580 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2024-10-13 06:52:01,580 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 100 flow [2024-10-13 06:52:01,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-13 06:52:01,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:01,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:01,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 06:52:01,581 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:01,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1738631724, now seen corresponding path program 1 times [2024-10-13 06:52:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988744932] [2024-10-13 06:52:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:01,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988744932] [2024-10-13 06:52:01,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988744932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:01,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:01,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:01,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574427725] [2024-10-13 06:52:01,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:01,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:01,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-10-13 06:52:01,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-13 06:52:01,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:01,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-10-13 06:52:01,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:01,765 INFO L124 PetriNetUnfolderBase]: 459/940 cut-off events. [2024-10-13 06:52:01,767 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-10-13 06:52:01,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 940 events. 459/940 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4887 event pairs, 87 based on Foata normal form. 691/1614 useless extension candidates. Maximal degree in co-relation 2087. Up to 608 conditions per place. [2024-10-13 06:52:01,774 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 20 selfloop transitions, 8 changer transitions 0/37 dead transitions. [2024-10-13 06:52:01,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 181 flow [2024-10-13 06:52:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-13 06:52:01,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-10-13 06:52:01,777 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 100 flow. Second operand 3 states and 89 transitions. [2024-10-13 06:52:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 181 flow [2024-10-13 06:52:01,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:01,781 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 112 flow [2024-10-13 06:52:01,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-10-13 06:52:01,782 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-10-13 06:52:01,783 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 112 flow [2024-10-13 06:52:01,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-13 06:52:01,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:01,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:01,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 06:52:01,784 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:01,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2073841517, now seen corresponding path program 1 times [2024-10-13 06:52:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:01,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783953487] [2024-10-13 06:52:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783953487] [2024-10-13 06:52:01,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783953487] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:01,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:01,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:01,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056449487] [2024-10-13 06:52:01,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:01,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 06:52:01,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 06:52:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 06:52:01,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-13 06:52:01,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2024-10-13 06:52:01,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:01,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-13 06:52:01,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:02,025 INFO L124 PetriNetUnfolderBase]: 752/1449 cut-off events. [2024-10-13 06:52:02,026 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2024-10-13 06:52:02,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3887 conditions, 1449 events. 752/1449 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8169 event pairs, 51 based on Foata normal form. 18/1459 useless extension candidates. Maximal degree in co-relation 3873. Up to 849 conditions per place. [2024-10-13 06:52:02,038 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-10-13 06:52:02,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 306 flow [2024-10-13 06:52:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 06:52:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 06:52:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-10-13 06:52:02,041 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-13 06:52:02,041 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 112 flow. Second operand 4 states and 116 transitions. [2024-10-13 06:52:02,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 306 flow [2024-10-13 06:52:02,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:02,046 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 144 flow [2024-10-13 06:52:02,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-10-13 06:52:02,048 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-10-13 06:52:02,048 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 144 flow [2024-10-13 06:52:02,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2024-10-13 06:52:02,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:02,051 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:02,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 06:52:02,051 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 06:52:02,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash 521615329, now seen corresponding path program 1 times [2024-10-13 06:52:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:02,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103315639] [2024-10-13 06:52:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:02,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:02,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:02,075 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:02,076 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-13 06:52:02,076 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-13 06:52:02,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-13 06:52:02,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-13 06:52:02,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-13 06:52:02,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-13 06:52:02,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 06:52:02,078 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-13 06:52:02,079 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:02,080 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 06:52:02,163 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:02,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 71 transitions, 198 flow [2024-10-13 06:52:02,169 INFO L124 PetriNetUnfolderBase]: 6/51 cut-off events. [2024-10-13 06:52:02,169 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 06:52:02,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 51 events. 6/51 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 67. Up to 5 conditions per place. [2024-10-13 06:52:02,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 71 transitions, 198 flow [2024-10-13 06:52:02,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 111 flow [2024-10-13 06:52:02,170 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:02,171 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:02,171 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-13 06:52:02,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:02,173 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-13 06:52:02,173 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:02,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:02,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:02,173 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:02,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1893025796, now seen corresponding path program 1 times [2024-10-13 06:52:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050330523] [2024-10-13 06:52:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:02,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:02,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050330523] [2024-10-13 06:52:02,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050330523] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:02,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:02,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962021050] [2024-10-13 06:52:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:02,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:02,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-10-13 06:52:02,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-13 06:52:02,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:02,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-10-13 06:52:02,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:03,864 INFO L124 PetriNetUnfolderBase]: 19029/23680 cut-off events. [2024-10-13 06:52:03,864 INFO L125 PetriNetUnfolderBase]: For 3395/3395 co-relation queries the response was YES. [2024-10-13 06:52:03,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 23680 events. 19029/23680 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 109743 event pairs, 3960 based on Foata normal form. 3302/26918 useless extension candidates. Maximal degree in co-relation 48744. Up to 22390 conditions per place. [2024-10-13 06:52:04,034 INFO L140 encePairwiseOnDemand]: 58/71 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-10-13 06:52:04,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 226 flow [2024-10-13 06:52:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-10-13 06:52:04,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5586854460093896 [2024-10-13 06:52:04,036 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 111 flow. Second operand 3 states and 119 transitions. [2024-10-13 06:52:04,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 226 flow [2024-10-13 06:52:04,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 213 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:04,039 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 123 flow [2024-10-13 06:52:04,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-13 06:52:04,040 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-10-13 06:52:04,040 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 123 flow [2024-10-13 06:52:04,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-13 06:52:04,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:04,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:04,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 06:52:04,041 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:04,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 900921764, now seen corresponding path program 1 times [2024-10-13 06:52:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586317948] [2024-10-13 06:52:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:04,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586317948] [2024-10-13 06:52:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586317948] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:04,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871400054] [2024-10-13 06:52:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:04,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:04,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 71 [2024-10-13 06:52:04,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-13 06:52:04,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:04,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 71 [2024-10-13 06:52:04,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:04,349 INFO L124 PetriNetUnfolderBase]: 1176/2293 cut-off events. [2024-10-13 06:52:04,350 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2024-10-13 06:52:04,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5161 conditions, 2293 events. 1176/2293 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13709 event pairs, 214 based on Foata normal form. 2343/4605 useless extension candidates. Maximal degree in co-relation 5146. Up to 1539 conditions per place. [2024-10-13 06:52:04,360 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 24 selfloop transitions, 10 changer transitions 0/44 dead transitions. [2024-10-13 06:52:04,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 223 flow [2024-10-13 06:52:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-10-13 06:52:04,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5305164319248826 [2024-10-13 06:52:04,362 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 123 flow. Second operand 3 states and 113 transitions. [2024-10-13 06:52:04,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 223 flow [2024-10-13 06:52:04,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:04,363 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 138 flow [2024-10-13 06:52:04,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-10-13 06:52:04,364 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-10-13 06:52:04,364 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 138 flow [2024-10-13 06:52:04,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-13 06:52:04,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:04,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:04,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 06:52:04,365 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:04,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -451699061, now seen corresponding path program 1 times [2024-10-13 06:52:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734655067] [2024-10-13 06:52:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:04,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734655067] [2024-10-13 06:52:04,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734655067] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:04,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133037728] [2024-10-13 06:52:04,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:04,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 06:52:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 06:52:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 06:52:04,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-10-13 06:52:04,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-13 06:52:04,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:04,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-10-13 06:52:04,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:04,680 INFO L124 PetriNetUnfolderBase]: 1852/3415 cut-off events. [2024-10-13 06:52:04,680 INFO L125 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2024-10-13 06:52:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 3415 events. 1852/3415 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21513 event pairs, 85 based on Foata normal form. 30/3436 useless extension candidates. Maximal degree in co-relation 9279. Up to 2321 conditions per place. [2024-10-13 06:52:04,712 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 49 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-10-13 06:52:04,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 384 flow [2024-10-13 06:52:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 06:52:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 06:52:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-10-13 06:52:04,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5176056338028169 [2024-10-13 06:52:04,714 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 138 flow. Second operand 4 states and 147 transitions. [2024-10-13 06:52:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 384 flow [2024-10-13 06:52:04,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:04,721 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 180 flow [2024-10-13 06:52:04,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-10-13 06:52:04,722 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-10-13 06:52:04,722 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 180 flow [2024-10-13 06:52:04,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-13 06:52:04,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:04,723 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:04,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 06:52:04,723 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:04,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1369866453, now seen corresponding path program 2 times [2024-10-13 06:52:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:04,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734548985] [2024-10-13 06:52:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:04,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:04,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734548985] [2024-10-13 06:52:04,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734548985] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:52:04,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874697277] [2024-10-13 06:52:04,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 06:52:04,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:52:04,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:52:04,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:52:04,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 06:52:04,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 06:52:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:52:04,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 06:52:04,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:52:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:05,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:52:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:05,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874697277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:52:05,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:52:05,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-13 06:52:05,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790206443] [2024-10-13 06:52:05,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:52:05,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 06:52:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 06:52:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-13 06:52:05,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-10-13 06:52:05,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 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) [2024-10-13 06:52:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-10-13 06:52:05,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:06,367 INFO L124 PetriNetUnfolderBase]: 4241/7782 cut-off events. [2024-10-13 06:52:06,367 INFO L125 PetriNetUnfolderBase]: For 3073/3073 co-relation queries the response was YES. [2024-10-13 06:52:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20213 conditions, 7782 events. 4241/7782 cut-off events. For 3073/3073 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 56392 event pairs, 845 based on Foata normal form. 78/7851 useless extension candidates. Maximal degree in co-relation 20195. Up to 2808 conditions per place. [2024-10-13 06:52:06,406 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 50 selfloop transitions, 21 changer transitions 0/80 dead transitions. [2024-10-13 06:52:06,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 486 flow [2024-10-13 06:52:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 06:52:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 06:52:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-10-13 06:52:06,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49014084507042255 [2024-10-13 06:52:06,408 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 180 flow. Second operand 5 states and 174 transitions. [2024-10-13 06:52:06,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 486 flow [2024-10-13 06:52:06,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 468 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-13 06:52:06,411 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 266 flow [2024-10-13 06:52:06,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-10-13 06:52:06,412 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-10-13 06:52:06,412 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 266 flow [2024-10-13 06:52:06,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 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) [2024-10-13 06:52:06,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:06,413 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:06,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 06:52:06,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 06:52:06,618 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 06:52:06,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2099183726, now seen corresponding path program 1 times [2024-10-13 06:52:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069170566] [2024-10-13 06:52:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:06,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:06,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:06,646 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:06,646 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-13 06:52:06,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-10-13 06:52:06,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-10-13 06:52:06,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-10-13 06:52:06,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-10-13 06:52:06,647 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-10-13 06:52:06,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-10-13 06:52:06,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 06:52:06,648 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-10-13 06:52:06,649 WARN L239 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:06,652 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-10-13 06:52:06,701 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:06,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 87 transitions, 254 flow [2024-10-13 06:52:06,708 INFO L124 PetriNetUnfolderBase]: 7/60 cut-off events. [2024-10-13 06:52:06,708 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-13 06:52:06,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 60 events. 7/60 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 82. Up to 6 conditions per place. [2024-10-13 06:52:06,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 87 transitions, 254 flow [2024-10-13 06:52:06,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 135 flow [2024-10-13 06:52:06,711 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:06,711 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:06,711 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-13 06:52:06,713 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:06,713 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-13 06:52:06,713 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:52:06,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:06,713 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:06,713 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:06,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1009763840, now seen corresponding path program 1 times [2024-10-13 06:52:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:06,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569488272] [2024-10-13 06:52:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569488272] [2024-10-13 06:52:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569488272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:06,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:06,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:06,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844573852] [2024-10-13 06:52:06,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:06,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:06,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-10-13 06:52:06,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-13 06:52:06,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:06,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-10-13 06:52:06,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:14,687 INFO L124 PetriNetUnfolderBase]: 91293/108940 cut-off events. [2024-10-13 06:52:14,688 INFO L125 PetriNetUnfolderBase]: For 19847/19847 co-relation queries the response was YES. [2024-10-13 06:52:14,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225254 conditions, 108940 events. 91293/108940 cut-off events. For 19847/19847 co-relation queries the response was YES. Maximal size of possible extension queue 3086. Compared 506563 event pairs, 21477 based on Foata normal form. 12797/121574 useless extension candidates. Maximal degree in co-relation 225240. Up to 105970 conditions per place. [2024-10-13 06:52:15,451 INFO L140 encePairwiseOnDemand]: 72/87 looper letters, 40 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2024-10-13 06:52:15,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 279 flow [2024-10-13 06:52:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2024-10-13 06:52:15,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478927203065134 [2024-10-13 06:52:15,453 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 135 flow. Second operand 3 states and 143 transitions. [2024-10-13 06:52:15,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 279 flow [2024-10-13 06:52:15,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 254 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:15,462 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 146 flow [2024-10-13 06:52:15,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-10-13 06:52:15,465 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-10-13 06:52:15,465 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 146 flow [2024-10-13 06:52:15,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-13 06:52:15,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:15,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:15,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 06:52:15,466 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:15,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash -629066721, now seen corresponding path program 1 times [2024-10-13 06:52:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916379111] [2024-10-13 06:52:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:15,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:15,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916379111] [2024-10-13 06:52:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916379111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:15,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:15,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793284973] [2024-10-13 06:52:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:15,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:15,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 87 [2024-10-13 06:52:15,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2024-10-13 06:52:15,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:15,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 87 [2024-10-13 06:52:15,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:15,956 INFO L124 PetriNetUnfolderBase]: 2865/5388 cut-off events. [2024-10-13 06:52:15,956 INFO L125 PetriNetUnfolderBase]: For 1183/1183 co-relation queries the response was YES. [2024-10-13 06:52:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12181 conditions, 5388 events. 2865/5388 cut-off events. For 1183/1183 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 36324 event pairs, 523 based on Foata normal form. 7138/12463 useless extension candidates. Maximal degree in co-relation 12165. Up to 3714 conditions per place. [2024-10-13 06:52:15,976 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 28 selfloop transitions, 12 changer transitions 0/51 dead transitions. [2024-10-13 06:52:15,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 265 flow [2024-10-13 06:52:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:52:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:52:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-10-13 06:52:15,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.524904214559387 [2024-10-13 06:52:15,978 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 146 flow. Second operand 3 states and 137 transitions. [2024-10-13 06:52:15,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 265 flow [2024-10-13 06:52:15,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:15,980 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 164 flow [2024-10-13 06:52:15,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-10-13 06:52:15,980 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2024-10-13 06:52:15,980 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 164 flow [2024-10-13 06:52:15,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2024-10-13 06:52:15,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:15,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:15,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 06:52:15,981 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:15,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1984883800, now seen corresponding path program 1 times [2024-10-13 06:52:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314336609] [2024-10-13 06:52:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:16,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314336609] [2024-10-13 06:52:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314336609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:16,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:16,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:52:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647521070] [2024-10-13 06:52:16,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:16,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 06:52:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 06:52:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 06:52:16,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-10-13 06:52:16,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2024-10-13 06:52:16,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:16,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-10-13 06:52:16,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:16,625 INFO L124 PetriNetUnfolderBase]: 4277/7650 cut-off events. [2024-10-13 06:52:16,625 INFO L125 PetriNetUnfolderBase]: For 1831/1831 co-relation queries the response was YES. [2024-10-13 06:52:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21010 conditions, 7650 events. 4277/7650 cut-off events. For 1831/1831 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 52787 event pairs, 161 based on Foata normal form. 45/7684 useless extension candidates. Maximal degree in co-relation 20994. Up to 5809 conditions per place. [2024-10-13 06:52:16,692 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 58 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-13 06:52:16,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 462 flow [2024-10-13 06:52:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 06:52:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 06:52:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-10-13 06:52:16,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114942528735632 [2024-10-13 06:52:16,694 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 164 flow. Second operand 4 states and 178 transitions. [2024-10-13 06:52:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 462 flow [2024-10-13 06:52:16,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 06:52:16,706 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 216 flow [2024-10-13 06:52:16,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-10-13 06:52:16,707 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-10-13 06:52:16,707 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 216 flow [2024-10-13 06:52:16,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2024-10-13 06:52:16,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:16,708 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:16,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 06:52:16,708 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:16,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1401267010, now seen corresponding path program 2 times [2024-10-13 06:52:16,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928147624] [2024-10-13 06:52:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928147624] [2024-10-13 06:52:16,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928147624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:52:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454712729] [2024-10-13 06:52:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 06:52:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:52:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:52:16,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:52:16,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 06:52:16,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 06:52:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:52:16,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 06:52:16,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:52:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:17,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:52:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:17,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454712729] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:52:17,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:52:17,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-13 06:52:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330059794] [2024-10-13 06:52:17,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:52:17,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 06:52:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:17,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 06:52:17,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-13 06:52:17,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-10-13 06:52:17,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 216 flow. Second operand has 11 states, 11 states have (on average 30.545454545454547) internal successors, (336), 11 states have internal predecessors, (336), 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) [2024-10-13 06:52:17,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:17,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-10-13 06:52:17,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:18,827 INFO L124 PetriNetUnfolderBase]: 10517/18749 cut-off events. [2024-10-13 06:52:18,827 INFO L125 PetriNetUnfolderBase]: For 7613/7613 co-relation queries the response was YES. [2024-10-13 06:52:18,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48834 conditions, 18749 events. 10517/18749 cut-off events. For 7613/7613 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 150078 event pairs, 2009 based on Foata normal form. 171/18907 useless extension candidates. Maximal degree in co-relation 48815. Up to 6579 conditions per place. [2024-10-13 06:52:18,929 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 59 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-10-13 06:52:18,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 95 transitions, 588 flow [2024-10-13 06:52:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 06:52:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 06:52:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-10-13 06:52:18,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4850574712643678 [2024-10-13 06:52:18,931 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 216 flow. Second operand 5 states and 211 transitions. [2024-10-13 06:52:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 95 transitions, 588 flow [2024-10-13 06:52:18,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 95 transitions, 566 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-13 06:52:18,938 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 323 flow [2024-10-13 06:52:18,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2024-10-13 06:52:18,938 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2024-10-13 06:52:18,938 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 323 flow [2024-10-13 06:52:18,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.545454545454547) internal successors, (336), 11 states have internal predecessors, (336), 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) [2024-10-13 06:52:18,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:18,939 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:18,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 06:52:19,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 06:52:19,139 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:19,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1971800728, now seen corresponding path program 3 times [2024-10-13 06:52:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357641994] [2024-10-13 06:52:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357641994] [2024-10-13 06:52:19,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357641994] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:52:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6284382] [2024-10-13 06:52:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 06:52:19,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:52:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:52:19,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:52:19,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 06:52:19,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 06:52:19,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:52:19,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 06:52:19,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:52:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:19,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:52:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6284382] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:52:19,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:52:19,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-10-13 06:52:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262573033] [2024-10-13 06:52:19,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:52:19,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 06:52:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 06:52:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-13 06:52:19,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 87 [2024-10-13 06:52:19,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 323 flow. Second operand has 12 states, 12 states have (on average 26.0) internal successors, (312), 12 states have internal predecessors, (312), 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) [2024-10-13 06:52:19,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:19,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 87 [2024-10-13 06:52:19,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:52:21,352 INFO L124 PetriNetUnfolderBase]: 10826/18343 cut-off events. [2024-10-13 06:52:21,352 INFO L125 PetriNetUnfolderBase]: For 15172/15172 co-relation queries the response was YES. [2024-10-13 06:52:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51477 conditions, 18343 events. 10826/18343 cut-off events. For 15172/15172 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 136108 event pairs, 178 based on Foata normal form. 342/18675 useless extension candidates. Maximal degree in co-relation 51457. Up to 5808 conditions per place. [2024-10-13 06:52:21,515 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 93 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2024-10-13 06:52:21,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 127 transitions, 816 flow [2024-10-13 06:52:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 06:52:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 06:52:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 275 transitions. [2024-10-13 06:52:21,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.451559934318555 [2024-10-13 06:52:21,517 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 323 flow. Second operand 7 states and 275 transitions. [2024-10-13 06:52:21,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 127 transitions, 816 flow [2024-10-13 06:52:21,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 127 transitions, 760 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-10-13 06:52:21,552 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 309 flow [2024-10-13 06:52:21,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-10-13 06:52:21,553 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-10-13 06:52:21,553 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 309 flow [2024-10-13 06:52:21,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.0) internal successors, (312), 12 states have internal predecessors, (312), 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) [2024-10-13 06:52:21,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:21,553 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:21,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 06:52:21,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 06:52:21,754 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 06:52:21,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2126999426, now seen corresponding path program 1 times [2024-10-13 06:52:21,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:21,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692187041] [2024-10-13 06:52:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:21,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:21,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:52:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:52:21,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:52:21,770 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:52:21,770 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-13 06:52:21,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-10-13 06:52:21,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-10-13 06:52:21,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-10-13 06:52:21,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-10-13 06:52:21,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-10-13 06:52:21,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-10-13 06:52:21,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-10-13 06:52:21,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 06:52:21,771 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2024-10-13 06:52:21,772 WARN L239 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:52:21,772 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-10-13 06:52:21,818 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:52:21,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 103 transitions, 314 flow [2024-10-13 06:52:21,827 INFO L124 PetriNetUnfolderBase]: 8/69 cut-off events. [2024-10-13 06:52:21,827 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-13 06:52:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 69 events. 8/69 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 116 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 98. Up to 7 conditions per place. [2024-10-13 06:52:21,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 103 transitions, 314 flow [2024-10-13 06:52:21,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 52 transitions, 161 flow [2024-10-13 06:52:21,832 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:52:21,833 INFO L333 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, 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;@3004cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:52:21,833 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-13 06:52:21,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:52:21,834 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-13 06:52:21,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:52:21,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:52:21,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:52:21,835 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-10-13 06:52:21,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:52:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1397489739, now seen corresponding path program 1 times [2024-10-13 06:52:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:52:21,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983085479] [2024-10-13 06:52:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:52:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:52:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:52:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:52:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:52:21,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983085479] [2024-10-13 06:52:21,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983085479] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:52:21,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:52:21,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:52:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117979132] [2024-10-13 06:52:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:52:21,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:52:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:52:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:52:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:52:21,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 103 [2024-10-13 06:52:21,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2024-10-13 06:52:21,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:52:21,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 103 [2024-10-13 06:52:21,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand