./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-theta/unwind3-100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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-theta/unwind3-100.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 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:48:43,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:48:43,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:48:43,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:48:43,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:48:43,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:48:43,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:48:43,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:48:43,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:48:43,669 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:48:43,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:48:43,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:48:43,671 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:48:43,672 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:48:43,674 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:48:43,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:48:43,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:48:43,694 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:48:43,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:48:43,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:48:43,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:48:43,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:48:43,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:48:43,696 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:48:43,696 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:48:43,696 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:48:43,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:48:43,697 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:48:43,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:48:43,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:48:43,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:48:43,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:48:43,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:48:43,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:48:43,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:48:43,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:48:43,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:48:43,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:48:43,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:48:43,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:48:43,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:48:43,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:48:43,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 [2024-11-20 09:48:43,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:48:44,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:48:44,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:48:44,020 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:48:44,024 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:48:44,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-20 09:48:45,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:48:46,219 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:48:46,220 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-20 09:48:46,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c93649e8/f75f5c61cd4e4a7ca6d4489c65d3316e/FLAG446987683 [2024-11-20 09:48:46,254 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c93649e8/f75f5c61cd4e4a7ca6d4489c65d3316e [2024-11-20 09:48:46,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:48:46,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:48:46,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:48:46,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:48:46,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:48:46,269 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:46,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46, skipping insertion in model container [2024-11-20 09:48:46,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:46,317 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:48:46,795 WARN L250 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-theta/unwind3-100.i[33026,33039] [2024-11-20 09:48:46,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:48:46,855 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:48:46,918 WARN L250 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-theta/unwind3-100.i[33026,33039] [2024-11-20 09:48:46,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:48:46,995 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:48:46,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46 WrapperNode [2024-11-20 09:48:46,996 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:48:46,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:48:46,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:48:46,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:48:47,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,055 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-11-20 09:48:47,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:48:47,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:48:47,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:48:47,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:48:47,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,103 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]. [2024-11-20 09:48:47,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,113 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:48:47,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:48:47,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:48:47,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:48:47,131 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (1/1) ... [2024-11-20 09:48:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:48:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:47,172 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) [2024-11-20 09:48:47,176 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 [2024-11-20 09:48:47,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:48:47,229 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-20 09:48:47,232 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-20 09:48:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-20 09:48:47,233 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-20 09:48:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:48:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:48:47,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:48:47,235 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:48:47,365 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:48:47,368 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:48:47,497 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:48:47,498 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:48:47,632 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:48:47,632 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 09:48:47,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:48:47 BoogieIcfgContainer [2024-11-20 09:48:47,633 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:48:47,635 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:48:47,635 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:48:47,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:48:47,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:48:46" (1/3) ... [2024-11-20 09:48:47,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9186f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:48:47, skipping insertion in model container [2024-11-20 09:48:47,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:48:46" (2/3) ... [2024-11-20 09:48:47,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9186f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:48:47, skipping insertion in model container [2024-11-20 09:48:47,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:48:47" (3/3) ... [2024-11-20 09:48:47,649 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind3-100.i [2024-11-20 09:48:47,667 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:48:47,667 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:48:47,667 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:48:47,719 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:48:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2024-11-20 09:48:47,798 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-20 09:48:47,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:48:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 18. Up to 4 conditions per place. [2024-11-20 09:48:47,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2024-11-20 09:48:47,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2024-11-20 09:48:47,821 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:48:47,830 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:48:47,831 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 09:48:47,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:48:47,843 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-11-20 09:48:47,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:48:47,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:47,847 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:47,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:48:47,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -448857358, now seen corresponding path program 1 times [2024-11-20 09:48:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572454008] [2024-11-20 09:48:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:48,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:48:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:48,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:48:48,070 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:48:48,072 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-20 09:48:48,075 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-20 09:48:48,076 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-20 09:48:48,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-20 09:48:48,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:48:48,078 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-20 09:48:48,084 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:48:48,085 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 09:48:48,118 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:48:48,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 90 flow [2024-11-20 09:48:48,143 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-20 09:48:48,144 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:48:48,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 50 events. 6/50 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 61. Up to 6 conditions per place. [2024-11-20 09:48:48,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 90 flow [2024-11-20 09:48:48,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 57 flow [2024-11-20 09:48:48,148 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:48:48,151 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:48:48,152 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-20 09:48:48,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:48:48,168 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:48:48,168 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:48:48,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:48,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:48,169 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-20 09:48:48,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1216880788, now seen corresponding path program 1 times [2024-11-20 09:48:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:48,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287356289] [2024-11-20 09:48:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:48:48,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:48,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287356289] [2024-11-20 09:48:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287356289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:48,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:48,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:48:48,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976037835] [2024-11-20 09:48:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:48,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:48:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:48:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:48:48,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-11-20 09:48:48,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-20 09:48:48,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:48,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-11-20 09:48:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:48,672 INFO L124 PetriNetUnfolderBase]: 180/365 cut-off events. [2024-11-20 09:48:48,673 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-20 09:48:48,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 365 events. 180/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1639 event pairs, 78 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 223. Up to 298 conditions per place. [2024-11-20 09:48:48,679 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-20 09:48:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 105 flow [2024-11-20 09:48:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:48:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:48:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-20 09:48:48,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-20 09:48:48,694 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 57 flow. Second operand 4 states and 65 transitions. [2024-11-20 09:48:48,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 105 flow [2024-11-20 09:48:48,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:48:48,700 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 70 flow [2024-11-20 09:48:48,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2024-11-20 09:48:48,706 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-20 09:48:48,707 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 70 flow [2024-11-20 09:48:48,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-20 09:48:48,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:48,707 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:48,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:48:48,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-20 09:48:48,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1784255260, now seen corresponding path program 1 times [2024-11-20 09:48:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252739096] [2024-11-20 09:48:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:48,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:48:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:48,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:48:48,766 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:48:48,766 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-20 09:48:48,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-20 09:48:48,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-20 09:48:48,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-20 09:48:48,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-20 09:48:48,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:48:48,767 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-20 09:48:48,768 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:48:48,768 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 09:48:48,802 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:48:48,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 48 transitions, 132 flow [2024-11-20 09:48:48,813 INFO L124 PetriNetUnfolderBase]: 8/67 cut-off events. [2024-11-20 09:48:48,814 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 09:48:48,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 67 events. 8/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 187 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 84. Up to 8 conditions per place. [2024-11-20 09:48:48,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 48 transitions, 132 flow [2024-11-20 09:48:48,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 73 flow [2024-11-20 09:48:48,816 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:48:48,817 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:48:48,818 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-20 09:48:48,825 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:48:48,826 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:48:48,826 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:48:48,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:48,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:48,827 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-20 09:48:48,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1057345128, now seen corresponding path program 1 times [2024-11-20 09:48:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:48,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354931521] [2024-11-20 09:48:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:48:48,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354931521] [2024-11-20 09:48:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354931521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:48:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154578297] [2024-11-20 09:48:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:48,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:48:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:48:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:48:48,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-20 09:48:48,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-11-20 09:48:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-20 09:48:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:49,123 INFO L124 PetriNetUnfolderBase]: 810/1391 cut-off events. [2024-11-20 09:48:49,123 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-20 09:48:49,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1391 events. 810/1391 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7407 event pairs, 602 based on Foata normal form. 0/1271 useless extension candidates. Maximal degree in co-relation 907. Up to 1198 conditions per place. [2024-11-20 09:48:49,143 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-20 09:48:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 127 flow [2024-11-20 09:48:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:48:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:48:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-20 09:48:49,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-20 09:48:49,145 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 73 flow. Second operand 4 states and 84 transitions. [2024-11-20 09:48:49,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 127 flow [2024-11-20 09:48:49,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:48:49,150 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 84 flow [2024-11-20 09:48:49,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2024-11-20 09:48:49,150 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-20 09:48:49,151 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 84 flow [2024-11-20 09:48:49,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-11-20 09:48:49,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:49,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:49,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:48:49,152 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-20 09:48:49,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1227913786, now seen corresponding path program 1 times [2024-11-20 09:48:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351739194] [2024-11-20 09:48:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:49,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:49,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351739194] [2024-11-20 09:48:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351739194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:49,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:48:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150595475] [2024-11-20 09:48:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:49,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:48:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:48:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:48:49,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-20 09:48:49,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2024-11-20 09:48:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:49,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-20 09:48:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:49,796 INFO L124 PetriNetUnfolderBase]: 1335/2144 cut-off events. [2024-11-20 09:48:49,797 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-20 09:48:49,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 2144 events. 1335/2144 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11628 event pairs, 907 based on Foata normal form. 78/2044 useless extension candidates. Maximal degree in co-relation 1564. Up to 1455 conditions per place. [2024-11-20 09:48:49,829 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 25 selfloop transitions, 3 changer transitions 8/43 dead transitions. [2024-11-20 09:48:49,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 188 flow [2024-11-20 09:48:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:48:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:48:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-11-20 09:48:49,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-11-20 09:48:49,832 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 84 flow. Second operand 5 states and 106 transitions. [2024-11-20 09:48:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 188 flow [2024-11-20 09:48:49,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:48:49,834 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 96 flow [2024-11-20 09:48:49,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-11-20 09:48:49,835 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-20 09:48:49,835 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 96 flow [2024-11-20 09:48:49,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2024-11-20 09:48:49,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:49,835 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:49,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:48:49,836 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-20 09:48:49,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash -589408817, now seen corresponding path program 1 times [2024-11-20 09:48:49,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671926053] [2024-11-20 09:48:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671926053] [2024-11-20 09:48:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671926053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404718104] [2024-11-20 09:48:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:49,926 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) [2024-11-20 09:48:49,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:48:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:50,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:48:50,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:50,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:50,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404718104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:50,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:50,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 09:48:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431819144] [2024-11-20 09:48:50,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:50,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:48:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:48:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:48:50,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-20 09:48:50,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 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) [2024-11-20 09:48:50,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:50,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-20 09:48:50,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:50,276 INFO L124 PetriNetUnfolderBase]: 178/330 cut-off events. [2024-11-20 09:48:50,277 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-20 09:48:50,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 330 events. 178/330 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1356 event pairs, 13 based on Foata normal form. 39/369 useless extension candidates. Maximal degree in co-relation 707. Up to 162 conditions per place. [2024-11-20 09:48:50,281 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-11-20 09:48:50,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 156 flow [2024-11-20 09:48:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:48:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:48:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-11-20 09:48:50,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-20 09:48:50,283 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 96 flow. Second operand 7 states and 138 transitions. [2024-11-20 09:48:50,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 156 flow [2024-11-20 09:48:50,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:48:50,287 INFO L231 Difference]: Finished difference. Result has 36 places, 20 transitions, 75 flow [2024-11-20 09:48:50,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=20} [2024-11-20 09:48:50,288 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2024-11-20 09:48:50,288 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 20 transitions, 75 flow [2024-11-20 09:48:50,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 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) [2024-11-20 09:48:50,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:50,290 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:50,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:48:50,494 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,SelfDestructingSolverStorable5 [2024-11-20 09:48:50,496 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-20 09:48:50,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2049460721, now seen corresponding path program 1 times [2024-11-20 09:48:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202962413] [2024-11-20 09:48:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:50,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:48:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:50,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:48:50,522 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:48:50,522 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-20 09:48:50,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-20 09:48:50,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-20 09:48:50,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-20 09:48:50,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-20 09:48:50,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-20 09:48:50,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:48:50,524 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 09:48:50,525 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:48:50,525 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-20 09:48:50,620 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:48:50,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 61 transitions, 178 flow [2024-11-20 09:48:50,645 INFO L124 PetriNetUnfolderBase]: 10/84 cut-off events. [2024-11-20 09:48:50,649 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-20 09:48:50,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 84 events. 10/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 244 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 108. Up to 10 conditions per place. [2024-11-20 09:48:50,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 61 transitions, 178 flow [2024-11-20 09:48:50,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 30 transitions, 91 flow [2024-11-20 09:48:50,653 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:48:50,660 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:48:50,660 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-20 09:48:50,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:48:50,665 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:48:50,666 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:48:50,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:50,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:50,667 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-20 09:48:50,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1528182001, now seen corresponding path program 1 times [2024-11-20 09:48:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369098059] [2024-11-20 09:48:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:48:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369098059] [2024-11-20 09:48:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369098059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:50,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:48:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896269266] [2024-11-20 09:48:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:50,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:48:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:48:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:48:50,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-20 09:48:50,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2024-11-20 09:48:50,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:50,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-20 09:48:50,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:51,274 INFO L124 PetriNetUnfolderBase]: 3240/5027 cut-off events. [2024-11-20 09:48:51,274 INFO L125 PetriNetUnfolderBase]: For 498/498 co-relation queries the response was YES. [2024-11-20 09:48:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 5027 events. 3240/5027 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29580 event pairs, 2202 based on Foata normal form. 0/4664 useless extension candidates. Maximal degree in co-relation 3436. Up to 4438 conditions per place. [2024-11-20 09:48:51,313 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-20 09:48:51,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 151 flow [2024-11-20 09:48:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:48:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:48:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-20 09:48:51,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42213114754098363 [2024-11-20 09:48:51,316 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 91 flow. Second operand 4 states and 103 transitions. [2024-11-20 09:48:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 151 flow [2024-11-20 09:48:51,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 144 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-20 09:48:51,324 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 98 flow [2024-11-20 09:48:51,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-11-20 09:48:51,325 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-11-20 09:48:51,327 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 98 flow [2024-11-20 09:48:51,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2024-11-20 09:48:51,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:51,327 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:51,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:48:51,328 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-20 09:48:51,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1631634011, now seen corresponding path program 1 times [2024-11-20 09:48:51,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:51,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143354741] [2024-11-20 09:48:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:51,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143354741] [2024-11-20 09:48:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143354741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:51,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:51,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:48:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869495096] [2024-11-20 09:48:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:51,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:48:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:48:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:48:51,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-11-20 09:48:51,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-20 09:48:51,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:51,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-11-20 09:48:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:52,229 INFO L124 PetriNetUnfolderBase]: 5304/7819 cut-off events. [2024-11-20 09:48:52,229 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-20 09:48:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15657 conditions, 7819 events. 5304/7819 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46245 event pairs, 3688 based on Foata normal form. 240/7557 useless extension candidates. Maximal degree in co-relation 15620. Up to 5370 conditions per place. [2024-11-20 09:48:52,293 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 30 selfloop transitions, 3 changer transitions 10/51 dead transitions. [2024-11-20 09:48:52,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 224 flow [2024-11-20 09:48:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:48:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:48:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-20 09:48:52,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2024-11-20 09:48:52,295 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 98 flow. Second operand 5 states and 133 transitions. [2024-11-20 09:48:52,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 224 flow [2024-11-20 09:48:52,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:48:52,297 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 110 flow [2024-11-20 09:48:52,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2024-11-20 09:48:52,298 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-11-20 09:48:52,299 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 110 flow [2024-11-20 09:48:52,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-20 09:48:52,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:52,299 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:52,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:48:52,299 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-20 09:48:52,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -958983658, now seen corresponding path program 1 times [2024-11-20 09:48:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:52,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355378382] [2024-11-20 09:48:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:52,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355378382] [2024-11-20 09:48:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355378382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798213544] [2024-11-20 09:48:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:52,355 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) [2024-11-20 09:48:52,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:48:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:52,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:48:52,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:52,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:52,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798213544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:52,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 09:48:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137123617] [2024-11-20 09:48:52,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:52,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:48:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:48:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:48:52,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-20 09:48:52,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 110 flow. Second operand has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 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) [2024-11-20 09:48:52,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:52,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-20 09:48:52,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:53,104 INFO L124 PetriNetUnfolderBase]: 3121/4659 cut-off events. [2024-11-20 09:48:53,104 INFO L125 PetriNetUnfolderBase]: For 865/865 co-relation queries the response was YES. [2024-11-20 09:48:53,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 4659 events. 3121/4659 cut-off events. For 865/865 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25157 event pairs, 529 based on Foata normal form. 39/4536 useless extension candidates. Maximal degree in co-relation 9842. Up to 3376 conditions per place. [2024-11-20 09:48:53,157 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 43 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-20 09:48:53,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 266 flow [2024-11-20 09:48:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:48:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:48:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-11-20 09:48:53,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4332552693208431 [2024-11-20 09:48:53,159 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 110 flow. Second operand 7 states and 185 transitions. [2024-11-20 09:48:53,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 266 flow [2024-11-20 09:48:53,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 258 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 09:48:53,179 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 145 flow [2024-11-20 09:48:53,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2024-11-20 09:48:53,181 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-20 09:48:53,246 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 145 flow [2024-11-20 09:48:53,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 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) [2024-11-20 09:48:53,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:53,247 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:53,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:48:53,447 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,SelfDestructingSolverStorable9 [2024-11-20 09:48:53,448 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-20 09:48:53,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1148699942, now seen corresponding path program 1 times [2024-11-20 09:48:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:53,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348499757] [2024-11-20 09:48:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:53,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:48:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:48:53,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:48:53,491 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:48:53,495 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-20 09:48:53,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-11-20 09:48:53,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-20 09:48:53,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-20 09:48:53,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-20 09:48:53,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-20 09:48:53,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-20 09:48:53,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 09:48:53,496 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 09:48:53,497 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:48:53,497 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-20 09:48:53,545 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:48:53,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 74 transitions, 228 flow [2024-11-20 09:48:53,559 INFO L124 PetriNetUnfolderBase]: 12/101 cut-off events. [2024-11-20 09:48:53,559 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-20 09:48:53,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 101 events. 12/101 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 309 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2024-11-20 09:48:53,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 74 transitions, 228 flow [2024-11-20 09:48:53,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 111 flow [2024-11-20 09:48:53,562 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:48:53,565 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:48:53,565 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-20 09:48:53,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:48:53,569 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:48:53,569 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:48:53,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:53,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:53,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-20 09:48:53,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash 195137287, now seen corresponding path program 1 times [2024-11-20 09:48:53,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:53,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034608552] [2024-11-20 09:48:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:48:53,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034608552] [2024-11-20 09:48:53,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034608552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:53,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:53,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:48:53,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202758491] [2024-11-20 09:48:53,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:53,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:48:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:48:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:48:53,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-20 09:48:53,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 111 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) [2024-11-20 09:48:53,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:53,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-20 09:48:53,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:55,357 INFO L124 PetriNetUnfolderBase]: 12150/17567 cut-off events. [2024-11-20 09:48:55,358 INFO L125 PetriNetUnfolderBase]: For 2415/2415 co-relation queries the response was YES. [2024-11-20 09:48:55,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34752 conditions, 17567 events. 12150/17567 cut-off events. For 2415/2415 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 110838 event pairs, 10214 based on Foata normal form. 0/16472 useless extension candidates. Maximal degree in co-relation 12409. Up to 15778 conditions per place. [2024-11-20 09:48:55,477 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-11-20 09:48:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 177 flow [2024-11-20 09:48:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:48:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:48:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-11-20 09:48:55,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-20 09:48:55,479 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 111 flow. Second operand 4 states and 122 transitions. [2024-11-20 09:48:55,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 177 flow [2024-11-20 09:48:55,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 164 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 09:48:55,494 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 112 flow [2024-11-20 09:48:55,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2024-11-20 09:48:55,494 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2024-11-20 09:48:55,495 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 112 flow [2024-11-20 09:48:55,495 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) [2024-11-20 09:48:55,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:55,500 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:55,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 09:48:55,502 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-20 09:48:55,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1764308540, now seen corresponding path program 1 times [2024-11-20 09:48:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:55,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332351774] [2024-11-20 09:48:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:55,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:55,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:55,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332351774] [2024-11-20 09:48:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332351774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:48:55,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:48:55,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:48:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229147978] [2024-11-20 09:48:55,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:48:55,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:48:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:55,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:48:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:48:55,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-11-20 09:48:55,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2024-11-20 09:48:55,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:55,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-11-20 09:48:55,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:57,842 INFO L124 PetriNetUnfolderBase]: 19803/27394 cut-off events. [2024-11-20 09:48:57,842 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2024-11-20 09:48:57,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54835 conditions, 27394 events. 19803/27394 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169336 event pairs, 13975 based on Foata normal form. 726/26646 useless extension candidates. Maximal degree in co-relation 54797. Up to 19059 conditions per place. [2024-11-20 09:48:58,158 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 35 selfloop transitions, 3 changer transitions 12/59 dead transitions. [2024-11-20 09:48:58,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 260 flow [2024-11-20 09:48:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:48:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:48:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-20 09:48:58,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-11-20 09:48:58,160 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 112 flow. Second operand 5 states and 160 transitions. [2024-11-20 09:48:58,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 260 flow [2024-11-20 09:48:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:48:58,167 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 124 flow [2024-11-20 09:48:58,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2024-11-20 09:48:58,168 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-11-20 09:48:58,169 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 124 flow [2024-11-20 09:48:58,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2024-11-20 09:48:58,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:58,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:58,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 09:48:58,170 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-20 09:48:58,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1141040494, now seen corresponding path program 1 times [2024-11-20 09:48:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087783354] [2024-11-20 09:48:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087783354] [2024-11-20 09:48:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087783354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:58,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051088977] [2024-11-20 09:48:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:58,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:58,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:58,238 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) [2024-11-20 09:48:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:48:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:58,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:48:58,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:58,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051088977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:58,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:58,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 09:48:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485868632] [2024-11-20 09:48:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:58,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:48:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:58,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:48:58,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:48:58,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-20 09:48:58,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 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) [2024-11-20 09:48:58,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:58,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-20 09:48:58,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:00,288 INFO L124 PetriNetUnfolderBase]: 13894/19482 cut-off events. [2024-11-20 09:49:00,288 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-11-20 09:49:00,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42982 conditions, 19482 events. 13894/19482 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 117140 event pairs, 2601 based on Foata normal form. 39/18873 useless extension candidates. Maximal degree in co-relation 41027. Up to 15121 conditions per place. [2024-11-20 09:49:00,451 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 48 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-20 09:49:00,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 294 flow [2024-11-20 09:49:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:49:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:49:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-20 09:49:00,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42084942084942084 [2024-11-20 09:49:00,453 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 124 flow. Second operand 7 states and 218 transitions. [2024-11-20 09:49:00,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 294 flow [2024-11-20 09:49:00,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 286 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 09:49:00,688 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 159 flow [2024-11-20 09:49:00,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2024-11-20 09:49:00,691 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-11-20 09:49:00,691 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 159 flow [2024-11-20 09:49:00,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 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) [2024-11-20 09:49:00,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:00,691 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:00,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:49:00,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:49:00,897 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-20 09:49:00,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash -381750096, now seen corresponding path program 1 times [2024-11-20 09:49:00,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:00,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405141588] [2024-11-20 09:49:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:49:00,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:49:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:49:00,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:49:00,972 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:49:00,972 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-20 09:49:00,972 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 8 remaining) [2024-11-20 09:49:00,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-20 09:49:00,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-20 09:49:00,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-20 09:49:00,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-20 09:49:00,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-20 09:49:00,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-20 09:49:00,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 09:49:00,977 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-20 09:49:00,981 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:49:00,982 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-20 09:49:01,066 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:49:01,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 282 flow [2024-11-20 09:49:01,087 INFO L124 PetriNetUnfolderBase]: 14/118 cut-off events. [2024-11-20 09:49:01,091 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-20 09:49:01,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 118 events. 14/118 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 372 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 159. Up to 14 conditions per place. [2024-11-20 09:49:01,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 87 transitions, 282 flow [2024-11-20 09:49:01,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 38 transitions, 133 flow [2024-11-20 09:49:01,094 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:49:01,094 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:49:01,094 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-20 09:49:01,100 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:49:01,104 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:49:01,104 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:49:01,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:01,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:01,105 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-20 09:49:01,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1354163370, now seen corresponding path program 1 times [2024-11-20 09:49:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390393043] [2024-11-20 09:49:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:49:01,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:01,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390393043] [2024-11-20 09:49:01,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390393043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:49:01,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:49:01,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:49:01,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535862915] [2024-11-20 09:49:01,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:49:01,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:49:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:49:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:49:01,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-20 09:49:01,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-11-20 09:49:01,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:01,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-20 09:49:01,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:06,810 INFO L124 PetriNetUnfolderBase]: 43740/59999 cut-off events. [2024-11-20 09:49:06,810 INFO L125 PetriNetUnfolderBase]: For 10329/10329 co-relation queries the response was YES. [2024-11-20 09:49:07,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119224 conditions, 59999 events. 43740/59999 cut-off events. For 10329/10329 co-relation queries the response was YES. Maximal size of possible extension queue 2484. Compared 392492 event pairs, 37916 based on Foata normal form. 0/56720 useless extension candidates. Maximal degree in co-relation 43423. Up to 54658 conditions per place. [2024-11-20 09:49:07,419 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 29 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-20 09:49:07,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 205 flow [2024-11-20 09:49:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:49:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:49:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-20 09:49:07,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-11-20 09:49:07,420 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 133 flow. Second operand 4 states and 141 transitions. [2024-11-20 09:49:07,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 205 flow [2024-11-20 09:49:07,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 184 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-20 09:49:07,510 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 126 flow [2024-11-20 09:49:07,511 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-11-20 09:49:07,513 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-11-20 09:49:07,513 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 126 flow [2024-11-20 09:49:07,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-11-20 09:49:07,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:07,514 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:07,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 09:49:07,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-20 09:49:07,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:07,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1626922461, now seen corresponding path program 1 times [2024-11-20 09:49:07,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:07,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310577533] [2024-11-20 09:49:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:07,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310577533] [2024-11-20 09:49:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310577533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:49:07,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:49:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:49:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163947831] [2024-11-20 09:49:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:49:07,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:49:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:49:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:49:07,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-20 09:49:07,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-20 09:49:07,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:07,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-20 09:49:07,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:15,710 INFO L124 PetriNetUnfolderBase]: 71076/93883 cut-off events. [2024-11-20 09:49:15,710 INFO L125 PetriNetUnfolderBase]: For 5931/5931 co-relation queries the response was YES. [2024-11-20 09:49:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187907 conditions, 93883 events. 71076/93883 cut-off events. For 5931/5931 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 597807 event pairs, 50668 based on Foata normal form. 2184/91677 useless extension candidates. Maximal degree in co-relation 187868. Up to 65958 conditions per place. [2024-11-20 09:49:16,896 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 3 changer transitions 14/67 dead transitions. [2024-11-20 09:49:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 296 flow [2024-11-20 09:49:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:49:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:49:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-20 09:49:16,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4298850574712644 [2024-11-20 09:49:16,900 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 126 flow. Second operand 5 states and 187 transitions. [2024-11-20 09:49:16,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 296 flow [2024-11-20 09:49:16,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:49:16,915 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 138 flow [2024-11-20 09:49:16,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2024-11-20 09:49:16,917 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-20 09:49:16,917 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 138 flow [2024-11-20 09:49:16,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-20 09:49:16,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:16,918 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:16,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 09:49:16,918 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-20 09:49:16,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1105041565, now seen corresponding path program 1 times [2024-11-20 09:49:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:16,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323004730] [2024-11-20 09:49:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323004730] [2024-11-20 09:49:17,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323004730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:49:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385614674] [2024-11-20 09:49:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:49:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:49:17,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:49:17,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:49:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:17,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:49:17,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:49:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:17,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:49:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:17,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385614674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:49:17,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:49:17,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 09:49:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495113103] [2024-11-20 09:49:17,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:49:17,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:49:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:49:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:49:17,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-20 09:49:17,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 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) [2024-11-20 09:49:17,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:17,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-20 09:49:17,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:23,239 INFO L124 PetriNetUnfolderBase]: 52045/69216 cut-off events. [2024-11-20 09:49:23,239 INFO L125 PetriNetUnfolderBase]: For 16360/16360 co-relation queries the response was YES. [2024-11-20 09:49:23,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151523 conditions, 69216 events. 52045/69216 cut-off events. For 16360/16360 co-relation queries the response was YES. Maximal size of possible extension queue 2598. Compared 417540 event pairs, 13489 based on Foata normal form. 39/67149 useless extension candidates. Maximal degree in co-relation 146651. Up to 55216 conditions per place. [2024-11-20 09:49:23,927 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-20 09:49:23,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 322 flow [2024-11-20 09:49:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:49:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:49:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-11-20 09:49:23,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4121510673234811 [2024-11-20 09:49:23,929 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 138 flow. Second operand 7 states and 251 transitions. [2024-11-20 09:49:23,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 322 flow [2024-11-20 09:49:25,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 70 transitions, 314 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 09:49:25,434 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 173 flow [2024-11-20 09:49:25,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2024-11-20 09:49:25,435 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-11-20 09:49:25,435 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 173 flow [2024-11-20 09:49:25,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 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) [2024-11-20 09:49:25,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:25,436 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:25,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:49:25,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 09:49:25,638 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-20 09:49:25,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1026080248, now seen corresponding path program 1 times [2024-11-20 09:49:25,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167480225] [2024-11-20 09:49:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167480225] [2024-11-20 09:49:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167480225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:49:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407351351] [2024-11-20 09:49:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:49:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:49:25,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:49:25,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:49:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:25,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 09:49:25,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:49:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:25,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:49:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407351351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:49:26,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:49:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-20 09:49:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040746703] [2024-11-20 09:49:26,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:49:26,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:49:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:49:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:49:26,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-20 09:49:26,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 173 flow. Second operand has 19 states, 19 states have (on average 29.526315789473685) internal successors, (561), 19 states have internal predecessors, (561), 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) [2024-11-20 09:49:26,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:26,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-20 09:49:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:27,399 INFO L124 PetriNetUnfolderBase]: 11302/15675 cut-off events. [2024-11-20 09:49:27,400 INFO L125 PetriNetUnfolderBase]: For 18300/18300 co-relation queries the response was YES. [2024-11-20 09:49:27,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36785 conditions, 15675 events. 11302/15675 cut-off events. For 18300/18300 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 89986 event pairs, 144 based on Foata normal form. 1053/16728 useless extension candidates. Maximal degree in co-relation 36770. Up to 7290 conditions per place. [2024-11-20 09:49:27,504 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 67 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-20 09:49:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 413 flow [2024-11-20 09:49:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:49:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:49:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2024-11-20 09:49:27,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 09:49:27,506 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 173 flow. Second operand 10 states and 348 transitions. [2024-11-20 09:49:27,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 413 flow [2024-11-20 09:49:27,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 387 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-20 09:49:27,547 INFO L231 Difference]: Finished difference. Result has 59 places, 36 transitions, 147 flow [2024-11-20 09:49:27,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=147, PETRI_PLACES=59, PETRI_TRANSITIONS=36} [2024-11-20 09:49:27,547 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-11-20 09:49:27,548 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 36 transitions, 147 flow [2024-11-20 09:49:27,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 29.526315789473685) internal successors, (561), 19 states have internal predecessors, (561), 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) [2024-11-20 09:49:27,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:27,553 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:27,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:49:27,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:49:27,755 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-20 09:49:27,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 798171100, now seen corresponding path program 1 times [2024-11-20 09:49:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:27,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433997162] [2024-11-20 09:49:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:49:27,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 09:49:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 09:49:27,807 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 09:49:27,810 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 09:49:27,810 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-11-20 09:49:27,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2024-11-20 09:49:27,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-11-20 09:49:27,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 09:49:27,812 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-20 09:49:27,814 WARN L244 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 09:49:27,814 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-11-20 09:49:27,860 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:49:27,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 100 transitions, 340 flow [2024-11-20 09:49:27,877 INFO L124 PetriNetUnfolderBase]: 16/135 cut-off events. [2024-11-20 09:49:27,877 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 09:49:27,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 135 events. 16/135 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 429 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 186. Up to 16 conditions per place. [2024-11-20 09:49:27,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 100 transitions, 340 flow [2024-11-20 09:49:27,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 42 transitions, 157 flow [2024-11-20 09:49:27,879 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:49:27,881 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;@4f5556d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:49:27,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-20 09:49:27,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:49:27,887 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 09:49:27,887 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:49:27,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:27,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:27,887 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-20 09:49:27,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash 710785498, now seen corresponding path program 1 times [2024-11-20 09:49:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977074278] [2024-11-20 09:49:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:49:27,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977074278] [2024-11-20 09:49:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977074278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:49:27,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:49:27,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:49:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482260260] [2024-11-20 09:49:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:49:27,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:49:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:49:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:49:27,964 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2024-11-20 09:49:27,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-11-20 09:49:27,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:27,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2024-11-20 09:49:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:49:42,382 INFO L124 PetriNetUnfolderBase]: 153090/201911 cut-off events. [2024-11-20 09:49:42,382 INFO L125 PetriNetUnfolderBase]: For 42159/42159 co-relation queries the response was YES. [2024-11-20 09:49:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402563 conditions, 201911 events. 153090/201911 cut-off events. For 42159/42159 co-relation queries the response was YES. Maximal size of possible extension queue 7088. Compared 1359049 event pairs, 124674 based on Foata normal form. 0/192071 useless extension candidates. Maximal degree in co-relation 148885. Up to 185878 conditions per place. [2024-11-20 09:49:44,500 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-20 09:49:44,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 235 flow [2024-11-20 09:49:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:49:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:49:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-11-20 09:49:44,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 09:49:44,506 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 157 flow. Second operand 4 states and 160 transitions. [2024-11-20 09:49:44,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 235 flow [2024-11-20 09:49:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 46 transitions, 204 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-20 09:49:45,270 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 140 flow [2024-11-20 09:49:45,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2024-11-20 09:49:45,271 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-11-20 09:49:45,271 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 140 flow [2024-11-20 09:49:45,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-11-20 09:49:45,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:49:45,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:49:45,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 09:49:45,272 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-20 09:49:45,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:49:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1219968318, now seen corresponding path program 1 times [2024-11-20 09:49:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:49:45,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000057309] [2024-11-20 09:49:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:49:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:49:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:49:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:49:45,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:49:45,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000057309] [2024-11-20 09:49:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000057309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:49:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:49:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:49:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355661846] [2024-11-20 09:49:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:49:45,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:49:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:49:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:49:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:49:45,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 100 [2024-11-20 09:49:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 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) [2024-11-20 09:49:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:49:45,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 100 [2024-11-20 09:49:45,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand