./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/exponential-64.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/pthread-theta/exponential-64.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 c5877a70884380b10e463fa3cfc6b55a5014f8a8b2ecd81a270409b479a9f5bc --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:56:43,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:56:43,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:56:43,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:56:43,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:56:43,410 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:56:43,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:56:43,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:56:43,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:56:43,415 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:56:43,415 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:56:43,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:56:43,416 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:56:43,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:56:43,418 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:56:43,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:56:43,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:56:43,418 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:56:43,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:56:43,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:56:43,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:56:43,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:56:43,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:56:43,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:56:43,421 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:56:43,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:56:43,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:56:43,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:56:43,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:56:43,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:56:43,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:56:43,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:56:43,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:56:43,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:56:43,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:56:43,424 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:56:43,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:56:43,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:56:43,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:56:43,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:56:43,430 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:56:43,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:56:43,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5877a70884380b10e463fa3cfc6b55a5014f8a8b2ecd81a270409b479a9f5bc [2024-11-22 13:56:43,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:56:43,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:56:43,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:56:43,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:56:43,704 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:56:43,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/exponential-64.i [2024-11-22 13:56:44,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:56:45,131 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:56:45,133 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-64.i [2024-11-22 13:56:45,152 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd8fbb62/bd7a12917cab436b835a14bb0669cc60/FLAG881e6b385 [2024-11-22 13:56:45,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd8fbb62/bd7a12917cab436b835a14bb0669cc60 [2024-11-22 13:56:45,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:56:45,170 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:56:45,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:56:45,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:56:45,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:56:45,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e44547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45, skipping insertion in model container [2024-11-22 13:56:45,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,219 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:56:45,511 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/exponential-64.i[33030,33043] [2024-11-22 13:56:45,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:56:45,534 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:56:45,567 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/exponential-64.i[33030,33043] [2024-11-22 13:56:45,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:56:45,604 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:56:45,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45 WrapperNode [2024-11-22 13:56:45,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:56:45,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:56:45,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:56:45,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:56:45,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,663 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-11-22 13:56:45,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:56:45,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:56:45,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:56:45,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:56:45,672 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,676 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,695 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]. [2024-11-22 13:56:45,695 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,695 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,704 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:56:45,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:56:45,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:56:45,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:56:45,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (1/1) ... [2024-11-22 13:56:45,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:56:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:45,737 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) [2024-11-22 13:56:45,739 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 [2024-11-22 13:56:45,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:56:45,785 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-22 13:56:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-22 13:56:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-22 13:56:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-22 13:56:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:56:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:56:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:56:45,787 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:56:45,898 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:56:45,899 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:56:45,997 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:56:45,997 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:56:46,070 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:56:46,071 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 13:56:46,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:56:46 BoogieIcfgContainer [2024-11-22 13:56:46,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:56:46,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:56:46,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:56:46,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:56:46,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:56:45" (1/3) ... [2024-11-22 13:56:46,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560e2acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:56:46, skipping insertion in model container [2024-11-22 13:56:46,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:45" (2/3) ... [2024-11-22 13:56:46,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560e2acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:56:46, skipping insertion in model container [2024-11-22 13:56:46,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:56:46" (3/3) ... [2024-11-22 13:56:46,079 INFO L112 eAbstractionObserver]: Analyzing ICFG exponential-64.i [2024-11-22 13:56:46,090 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:56:46,091 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:56:46,091 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:56:46,122 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:56:46,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2024-11-22 13:56:46,168 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-11-22 13:56:46,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:46,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 4/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 4 conditions per place. [2024-11-22 13:56:46,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2024-11-22 13:56:46,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2024-11-22 13:56:46,180 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:56:46,189 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:56:46,189 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:56:46,194 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:56:46,194 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:56:46,194 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:46,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:46,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:56:46,195 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:46,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 198549943, now seen corresponding path program 1 times [2024-11-22 13:56:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:46,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273844672] [2024-11-22 13:56:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:46,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:46,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273844672] [2024-11-22 13:56:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273844672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:46,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:46,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:56:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518098118] [2024-11-22 13:56:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:46,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:56:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:56:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:56:46,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 22 [2024-11-22 13:56:46,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 13:56:46,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:46,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 22 [2024-11-22 13:56:46,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:46,487 INFO L124 PetriNetUnfolderBase]: 23/67 cut-off events. [2024-11-22 13:56:46,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:46,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 67 events. 23/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 227 event pairs, 9 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 110. Up to 37 conditions per place. [2024-11-22 13:56:46,489 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 12 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2024-11-22 13:56:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 77 flow [2024-11-22 13:56:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:56:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:56:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-11-22 13:56:46,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-22 13:56:46,500 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 43 flow. Second operand 3 states and 42 transitions. [2024-11-22 13:56:46,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 77 flow [2024-11-22 13:56:46,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:46,503 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 50 flow [2024-11-22 13:56:46,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2024-11-22 13:56:46,507 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-22 13:56:46,507 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 50 flow [2024-11-22 13:56:46,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 13:56:46,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:46,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:46,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:56:46,508 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:46,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 648166806, now seen corresponding path program 1 times [2024-11-22 13:56:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983428451] [2024-11-22 13:56:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:46,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:56:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:46,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:56:46,560 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:56:46,562 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:56:46,565 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:56:46,565 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-22 13:56:46,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:56:46,566 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-22 13:56:46,567 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:56:46,569 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-22 13:56:46,585 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:56:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 30 transitions, 80 flow [2024-11-22 13:56:46,594 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2024-11-22 13:56:46,594 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 13:56:46,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 49 events. 6/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2024-11-22 13:56:46,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 30 transitions, 80 flow [2024-11-22 13:56:46,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 70 flow [2024-11-22 13:56:46,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:56:46,598 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:56:46,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:56:46,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:56:46,602 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:56:46,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:46,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:46,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:56:46,603 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:46,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash 227179093, now seen corresponding path program 1 times [2024-11-22 13:56:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:46,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430914841] [2024-11-22 13:56:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430914841] [2024-11-22 13:56:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430914841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:46,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:46,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:56:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714034646] [2024-11-22 13:56:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:46,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:56:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:56:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:56:46,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-11-22 13:56:46,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-22 13:56:46,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:46,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-11-22 13:56:46,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:46,805 INFO L124 PetriNetUnfolderBase]: 211/419 cut-off events. [2024-11-22 13:56:46,805 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-22 13:56:46,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 419 events. 211/419 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2149 event pairs, 133 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 332. Up to 321 conditions per place. [2024-11-22 13:56:46,810 INFO L140 encePairwiseOnDemand]: 27/30 looper letters, 18 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-22 13:56:46,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 120 flow [2024-11-22 13:56:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:56:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:56:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-22 13:56:46,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 13:56:46,813 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 70 flow. Second operand 3 states and 60 transitions. [2024-11-22 13:56:46,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 120 flow [2024-11-22 13:56:46,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:46,815 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 81 flow [2024-11-22 13:56:46,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-11-22 13:56:46,815 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-11-22 13:56:46,816 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 81 flow [2024-11-22 13:56:46,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-22 13:56:46,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:46,816 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:46,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:56:46,816 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:46,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2102617054, now seen corresponding path program 1 times [2024-11-22 13:56:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308965790] [2024-11-22 13:56:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:46,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308965790] [2024-11-22 13:56:46,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308965790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:46,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:46,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:56:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806330885] [2024-11-22 13:56:46,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:46,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:56:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:56:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:56:46,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-11-22 13:56:46,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-22 13:56:46,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:46,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-11-22 13:56:46,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:46,966 INFO L124 PetriNetUnfolderBase]: 247/475 cut-off events. [2024-11-22 13:56:46,967 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-22 13:56:46,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 475 events. 247/475 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2583 event pairs, 191 based on Foata normal form. 0/425 useless extension candidates. Maximal degree in co-relation 400. Up to 333 conditions per place. [2024-11-22 13:56:46,970 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 18 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-22 13:56:46,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 133 flow [2024-11-22 13:56:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:56:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:56:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-22 13:56:46,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-11-22 13:56:46,972 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 81 flow. Second operand 4 states and 73 transitions. [2024-11-22 13:56:46,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 133 flow [2024-11-22 13:56:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:46,975 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 93 flow [2024-11-22 13:56:46,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=79, 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=4, PETRI_FLOW=93, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2024-11-22 13:56:46,976 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-11-22 13:56:46,976 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 93 flow [2024-11-22 13:56:46,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-22 13:56:46,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:46,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:46,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:56:46,976 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:46,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash 756593096, now seen corresponding path program 1 times [2024-11-22 13:56:46,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:46,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211525461] [2024-11-22 13:56:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:46,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211525461] [2024-11-22 13:56:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211525461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241191586] [2024-11-22 13:56:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:47,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:47,058 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) [2024-11-22 13:56:47,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:56:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:47,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:56:47,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:47,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241191586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:47,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:47,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 13:56:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059557157] [2024-11-22 13:56:47,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:47,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:56:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:56:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:56:47,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-11-22 13:56:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-11-22 13:56:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-11-22 13:56:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:47,275 INFO L124 PetriNetUnfolderBase]: 119/247 cut-off events. [2024-11-22 13:56:47,275 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-22 13:56:47,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 247 events. 119/247 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1148 event pairs, 33 based on Foata normal form. 20/261 useless extension candidates. Maximal degree in co-relation 512. Up to 96 conditions per place. [2024-11-22 13:56:47,278 INFO L140 encePairwiseOnDemand]: 27/30 looper letters, 19 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-11-22 13:56:47,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 131 flow [2024-11-22 13:56:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 13:56:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 13:56:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-22 13:56:47,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-22 13:56:47,281 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 93 flow. Second operand 5 states and 89 transitions. [2024-11-22 13:56:47,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 131 flow [2024-11-22 13:56:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:47,282 INFO L231 Difference]: Finished difference. Result has 38 places, 22 transitions, 74 flow [2024-11-22 13:56:47,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=22} [2024-11-22 13:56:47,285 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-22 13:56:47,285 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 22 transitions, 74 flow [2024-11-22 13:56:47,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-11-22 13:56:47,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:47,287 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:47,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:56:47,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:47,488 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:47,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1307663877, now seen corresponding path program 1 times [2024-11-22 13:56:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:47,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639130534] [2024-11-22 13:56:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:47,503 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:56:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:47,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:56:47,520 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:56:47,521 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:56:47,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:56:47,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-22 13:56:47,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 13:56:47,522 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 13:56:47,523 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:56:47,523 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-22 13:56:47,545 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:56:47,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 38 transitions, 112 flow [2024-11-22 13:56:47,555 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-11-22 13:56:47,555 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-22 13:56:47,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 68 events. 8/68 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 70. Up to 8 conditions per place. [2024-11-22 13:56:47,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 38 transitions, 112 flow [2024-11-22 13:56:47,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 101 flow [2024-11-22 13:56:47,557 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:56:47,558 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:56:47,559 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:56:47,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:56:47,561 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:56:47,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:47,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:47,562 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:56:47,562 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:47,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash 263442683, now seen corresponding path program 1 times [2024-11-22 13:56:47,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:47,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755841629] [2024-11-22 13:56:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:47,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755841629] [2024-11-22 13:56:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755841629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:56:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037836201] [2024-11-22 13:56:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:47,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:56:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:56:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:56:47,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-22 13:56:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-22 13:56:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-22 13:56:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:47,794 INFO L124 PetriNetUnfolderBase]: 1347/2211 cut-off events. [2024-11-22 13:56:47,794 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2024-11-22 13:56:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 2211 events. 1347/2211 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13076 event pairs, 1013 based on Foata normal form. 0/1878 useless extension candidates. Maximal degree in co-relation 1892. Up to 1841 conditions per place. [2024-11-22 13:56:47,808 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 22 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-22 13:56:47,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 159 flow [2024-11-22 13:56:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:56:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:56:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-11-22 13:56:47,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 13:56:47,810 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 101 flow. Second operand 3 states and 76 transitions. [2024-11-22 13:56:47,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 159 flow [2024-11-22 13:56:47,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 154 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:47,814 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 108 flow [2024-11-22 13:56:47,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-11-22 13:56:47,816 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2024-11-22 13:56:47,816 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 108 flow [2024-11-22 13:56:47,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-11-22 13:56:47,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:47,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:47,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 13:56:47,817 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:47,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash 744679793, now seen corresponding path program 1 times [2024-11-22 13:56:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:47,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635014205] [2024-11-22 13:56:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635014205] [2024-11-22 13:56:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635014205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:47,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:47,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:56:47,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235554463] [2024-11-22 13:56:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:47,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:56:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:56:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:56:47,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-22 13:56:47,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-22 13:56:47,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:47,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-22 13:56:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:48,091 INFO L124 PetriNetUnfolderBase]: 1575/2523 cut-off events. [2024-11-22 13:56:48,091 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-11-22 13:56:48,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5056 conditions, 2523 events. 1575/2523 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15218 event pairs, 1135 based on Foata normal form. 0/2314 useless extension candidates. Maximal degree in co-relation 2224. Up to 1853 conditions per place. [2024-11-22 13:56:48,102 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 24 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-22 13:56:48,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 176 flow [2024-11-22 13:56:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:56:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:56:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-22 13:56:48,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-22 13:56:48,104 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 108 flow. Second operand 4 states and 95 transitions. [2024-11-22 13:56:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 176 flow [2024-11-22 13:56:48,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:48,105 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 120 flow [2024-11-22 13:56:48,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=106, 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=4, PETRI_FLOW=120, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2024-11-22 13:56:48,106 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2024-11-22 13:56:48,106 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 120 flow [2024-11-22 13:56:48,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-22 13:56:48,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:48,108 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:48,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 13:56:48,108 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:48,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1610211003, now seen corresponding path program 1 times [2024-11-22 13:56:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:48,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273804396] [2024-11-22 13:56:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273804396] [2024-11-22 13:56:48,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273804396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103310946] [2024-11-22 13:56:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:48,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:48,164 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) [2024-11-22 13:56:48,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:56:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:48,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:56:48,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:48,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:48,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103310946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:48,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:48,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 13:56:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901840686] [2024-11-22 13:56:48,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:48,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:56:48,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:56:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:56:48,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-22 13:56:48,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 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) [2024-11-22 13:56:48,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:48,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-22 13:56:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:48,380 INFO L124 PetriNetUnfolderBase]: 807/1335 cut-off events. [2024-11-22 13:56:48,381 INFO L125 PetriNetUnfolderBase]: For 516/516 co-relation queries the response was YES. [2024-11-22 13:56:48,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 1335 events. 807/1335 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7267 event pairs, 113 based on Foata normal form. 84/1362 useless extension candidates. Maximal degree in co-relation 2752. Up to 528 conditions per place. [2024-11-22 13:56:48,388 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 31 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-11-22 13:56:48,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 204 flow [2024-11-22 13:56:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:56:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:56:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-11-22 13:56:48,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-11-22 13:56:48,390 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 120 flow. Second operand 6 states and 140 transitions. [2024-11-22 13:56:48,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 204 flow [2024-11-22 13:56:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:48,393 INFO L231 Difference]: Finished difference. Result has 51 places, 31 transitions, 107 flow [2024-11-22 13:56:48,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=51, PETRI_TRANSITIONS=31} [2024-11-22 13:56:48,394 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2024-11-22 13:56:48,394 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 31 transitions, 107 flow [2024-11-22 13:56:48,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 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) [2024-11-22 13:56:48,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:48,394 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:48,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:48,595 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,SelfDestructingSolverStorable8 [2024-11-22 13:56:48,595 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:48,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:48,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1135638216, now seen corresponding path program 1 times [2024-11-22 13:56:48,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:48,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492362091] [2024-11-22 13:56:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:48,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:56:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:48,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:56:48,619 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:56:48,620 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:56:48,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:56:48,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-22 13:56:48,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 13:56:48,620 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 13:56:48,621 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:56:48,621 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-22 13:56:48,646 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:56:48,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 46 transitions, 148 flow [2024-11-22 13:56:48,652 INFO L124 PetriNetUnfolderBase]: 10/87 cut-off events. [2024-11-22 13:56:48,652 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-22 13:56:48,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 87 events. 10/87 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 99. Up to 10 conditions per place. [2024-11-22 13:56:48,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 46 transitions, 148 flow [2024-11-22 13:56:48,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 42 transitions, 136 flow [2024-11-22 13:56:48,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:56:48,655 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:56:48,655 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:56:48,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:56:48,656 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:56:48,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:48,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:48,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:56:48,656 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:48,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash 307340713, now seen corresponding path program 1 times [2024-11-22 13:56:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848558681] [2024-11-22 13:56:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:48,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848558681] [2024-11-22 13:56:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848558681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:48,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:48,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:56:48,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298773801] [2024-11-22 13:56:48,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:48,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:56:48,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:56:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:56:48,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-11-22 13:56:48,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2024-11-22 13:56:48,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:48,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-11-22 13:56:48,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:49,539 INFO L124 PetriNetUnfolderBase]: 7427/10915 cut-off events. [2024-11-22 13:56:49,540 INFO L125 PetriNetUnfolderBase]: For 2844/2844 co-relation queries the response was YES. [2024-11-22 13:56:49,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21588 conditions, 10915 events. 7427/10915 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 68764 event pairs, 6069 based on Foata normal form. 0/9566 useless extension candidates. Maximal degree in co-relation 9764. Up to 9457 conditions per place. [2024-11-22 13:56:49,607 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 26 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-22 13:56:49,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 47 transitions, 202 flow [2024-11-22 13:56:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:56:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:56:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-11-22 13:56:49,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 13:56:49,609 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 136 flow. Second operand 3 states and 92 transitions. [2024-11-22 13:56:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 47 transitions, 202 flow [2024-11-22 13:56:49,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 47 transitions, 189 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:49,618 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 135 flow [2024-11-22 13:56:49,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2024-11-22 13:56:49,621 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2024-11-22 13:56:49,621 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 135 flow [2024-11-22 13:56:49,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2024-11-22 13:56:49,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:49,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:49,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 13:56:49,622 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:49,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash 339211268, now seen corresponding path program 1 times [2024-11-22 13:56:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:49,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516634455] [2024-11-22 13:56:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516634455] [2024-11-22 13:56:49,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516634455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:49,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:49,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:56:49,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726095294] [2024-11-22 13:56:49,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:49,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:56:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:56:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:56:49,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-11-22 13:56:49,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2024-11-22 13:56:49,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:49,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-11-22 13:56:49,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:50,585 INFO L124 PetriNetUnfolderBase]: 8679/12507 cut-off events. [2024-11-22 13:56:50,586 INFO L125 PetriNetUnfolderBase]: For 1830/1830 co-relation queries the response was YES. [2024-11-22 13:56:50,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25026 conditions, 12507 events. 8679/12507 cut-off events. For 1830/1830 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 78544 event pairs, 6351 based on Foata normal form. 0/11658 useless extension candidates. Maximal degree in co-relation 11312. Up to 9469 conditions per place. [2024-11-22 13:56:50,751 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 30 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2024-11-22 13:56:50,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 219 flow [2024-11-22 13:56:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:56:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:56:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-22 13:56:50,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-11-22 13:56:50,752 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 135 flow. Second operand 4 states and 117 transitions. [2024-11-22 13:56:50,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 219 flow [2024-11-22 13:56:50,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:50,757 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 147 flow [2024-11-22 13:56:50,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2024-11-22 13:56:50,758 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2024-11-22 13:56:50,758 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 147 flow [2024-11-22 13:56:50,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2024-11-22 13:56:50,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:50,758 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:50,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 13:56:50,758 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:50,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1925588662, now seen corresponding path program 1 times [2024-11-22 13:56:50,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:50,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672108323] [2024-11-22 13:56:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:50,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672108323] [2024-11-22 13:56:50,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672108323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035140079] [2024-11-22 13:56:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:50,804 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) [2024-11-22 13:56:50,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:56:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:50,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:56:50,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:50,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:50,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035140079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:50,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:50,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 13:56:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520497940] [2024-11-22 13:56:50,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:50,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:56:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:56:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:56:50,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-11-22 13:56:50,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 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) [2024-11-22 13:56:50,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:50,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-11-22 13:56:50,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:51,588 INFO L124 PetriNetUnfolderBase]: 7911/11319 cut-off events. [2024-11-22 13:56:51,589 INFO L125 PetriNetUnfolderBase]: For 2850/2850 co-relation queries the response was YES. [2024-11-22 13:56:51,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24012 conditions, 11319 events. 7911/11319 cut-off events. For 2850/2850 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 67543 event pairs, 839 based on Foata normal form. 84/11022 useless extension candidates. Maximal degree in co-relation 13760. Up to 5377 conditions per place. [2024-11-22 13:56:51,732 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 48 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-22 13:56:51,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 317 flow [2024-11-22 13:56:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:56:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:56:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-11-22 13:56:51,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-22 13:56:51,733 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 147 flow. Second operand 6 states and 182 transitions. [2024-11-22 13:56:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 317 flow [2024-11-22 13:56:51,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 311 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-22 13:56:51,752 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 181 flow [2024-11-22 13:56:51,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2024-11-22 13:56:51,752 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2024-11-22 13:56:51,752 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 181 flow [2024-11-22 13:56:51,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 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) [2024-11-22 13:56:51,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:51,753 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:51,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:56:51,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:51,954 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:51,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -95023867, now seen corresponding path program 1 times [2024-11-22 13:56:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:51,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659017007] [2024-11-22 13:56:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:51,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:56:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:56:51,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:56:51,971 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:56:51,971 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:56:51,972 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:56:51,972 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-22 13:56:51,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 13:56:51,972 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-22 13:56:51,972 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:56:51,973 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-22 13:56:51,992 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:56:51,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 54 transitions, 188 flow [2024-11-22 13:56:51,997 INFO L124 PetriNetUnfolderBase]: 12/106 cut-off events. [2024-11-22 13:56:51,997 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-22 13:56:51,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 106 events. 12/106 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 130. Up to 12 conditions per place. [2024-11-22 13:56:51,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 54 transitions, 188 flow [2024-11-22 13:56:51,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 50 transitions, 175 flow [2024-11-22 13:56:51,999 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:56:51,999 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:56:51,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:56:52,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:56:52,000 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:56:52,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:56:52,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:52,000 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:56:52,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:52,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash 358873183, now seen corresponding path program 1 times [2024-11-22 13:56:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001635179] [2024-11-22 13:56:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001635179] [2024-11-22 13:56:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001635179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:52,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:52,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:56:52,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557159575] [2024-11-22 13:56:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:52,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:56:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:56:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:56:52,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-22 13:56:52,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:56:52,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:52,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-22 13:56:52,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:55,589 INFO L124 PetriNetUnfolderBase]: 37891/51875 cut-off events. [2024-11-22 13:56:55,589 INFO L125 PetriNetUnfolderBase]: For 19228/19228 co-relation queries the response was YES. [2024-11-22 13:56:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103766 conditions, 51875 events. 37891/51875 cut-off events. For 19228/19228 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 336813 event pairs, 32437 based on Foata normal form. 0/46430 useless extension candidates. Maximal degree in co-relation 47780. Up to 46065 conditions per place. [2024-11-22 13:56:55,937 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 30 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-22 13:56:55,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 55 transitions, 249 flow [2024-11-22 13:56:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:56:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:56:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-22 13:56:55,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 13:56:55,938 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 175 flow. Second operand 3 states and 108 transitions. [2024-11-22 13:56:55,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 55 transitions, 249 flow [2024-11-22 13:56:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 55 transitions, 224 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-22 13:56:55,989 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 162 flow [2024-11-22 13:56:55,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2024-11-22 13:56:55,990 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-22 13:56:55,990 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 162 flow [2024-11-22 13:56:55,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:56:55,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:55,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:55,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 13:56:55,991 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:55,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash 886211479, now seen corresponding path program 1 times [2024-11-22 13:56:55,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:55,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515540053] [2024-11-22 13:56:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:56:55,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515540053] [2024-11-22 13:56:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515540053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:56:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:56:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:56:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129207947] [2024-11-22 13:56:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:56:56,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:56:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:56:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:56:56,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-22 13:56:56,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-11-22 13:56:56,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:56,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-22 13:56:56,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:00,533 INFO L124 PetriNetUnfolderBase]: 44263/59611 cut-off events. [2024-11-22 13:57:00,533 INFO L125 PetriNetUnfolderBase]: For 11430/11430 co-relation queries the response was YES. [2024-11-22 13:57:00,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119236 conditions, 59611 events. 44263/59611 cut-off events. For 11430/11430 co-relation queries the response was YES. Maximal size of possible extension queue 2328. Compared 382012 event pairs, 36527 based on Foata normal form. 0/56202 useless extension candidates. Maximal degree in co-relation 54832. Up to 46077 conditions per place. [2024-11-22 13:57:00,968 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 36 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-11-22 13:57:00,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 62 transitions, 262 flow [2024-11-22 13:57:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:57:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:57:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-22 13:57:00,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-11-22 13:57:00,970 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 162 flow. Second operand 4 states and 139 transitions. [2024-11-22 13:57:00,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 62 transitions, 262 flow [2024-11-22 13:57:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 62 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:57:00,991 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 174 flow [2024-11-22 13:57:00,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2024-11-22 13:57:00,991 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-22 13:57:00,991 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 174 flow [2024-11-22 13:57:00,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-11-22 13:57:00,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:00,992 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:00,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 13:57:00,992 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:57:00,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1702726073, now seen corresponding path program 1 times [2024-11-22 13:57:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471359013] [2024-11-22 13:57:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471359013] [2024-11-22 13:57:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471359013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760608428] [2024-11-22 13:57:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:01,029 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) [2024-11-22 13:57:01,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:57:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:01,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:57:01,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:01,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:57:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760608428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:57:01,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:57:01,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 13:57:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497493616] [2024-11-22 13:57:01,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:57:01,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:57:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:57:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:57:01,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-22 13:57:01,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 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) [2024-11-22 13:57:01,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:01,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-22 13:57:01,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:05,160 INFO L124 PetriNetUnfolderBase]: 43495/58423 cut-off events. [2024-11-22 13:57:05,160 INFO L125 PetriNetUnfolderBase]: For 12834/12834 co-relation queries the response was YES. [2024-11-22 13:57:05,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123342 conditions, 58423 events. 43495/58423 cut-off events. For 12834/12834 co-relation queries the response was YES. Maximal size of possible extension queue 2197. Compared 367329 event pairs, 5447 based on Foata normal form. 84/55350 useless extension candidates. Maximal degree in co-relation 65984. Up to 30977 conditions per place. [2024-11-22 13:57:05,593 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 54 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-22 13:57:05,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 360 flow [2024-11-22 13:57:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:57:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:57:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 212 transitions. [2024-11-22 13:57:05,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2024-11-22 13:57:05,594 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 174 flow. Second operand 6 states and 212 transitions. [2024-11-22 13:57:05,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 360 flow [2024-11-22 13:57:06,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 354 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-22 13:57:06,115 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 208 flow [2024-11-22 13:57:06,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2024-11-22 13:57:06,115 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2024-11-22 13:57:06,115 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 208 flow [2024-11-22 13:57:06,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 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) [2024-11-22 13:57:06,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:06,116 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:06,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:57:06,316 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,SelfDestructingSolverStorable16 [2024-11-22 13:57:06,317 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:57:06,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1283341195, now seen corresponding path program 1 times [2024-11-22 13:57:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504073839] [2024-11-22 13:57:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:06,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504073839] [2024-11-22 13:57:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504073839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905965778] [2024-11-22 13:57:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:06,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:06,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:06,409 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) [2024-11-22 13:57:06,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:57:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:06,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 13:57:06,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:06,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:57:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:57:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905965778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:57:06,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:57:06,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-22 13:57:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676351571] [2024-11-22 13:57:06,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:57:06,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:57:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:57:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:57:06,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-22 13:57:06,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 208 flow. Second operand has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2024-11-22 13:57:06,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:06,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-22 13:57:06,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:09,064 INFO L124 PetriNetUnfolderBase]: 23783/32311 cut-off events. [2024-11-22 13:57:09,065 INFO L125 PetriNetUnfolderBase]: For 28414/28414 co-relation queries the response was YES. [2024-11-22 13:57:09,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71371 conditions, 32311 events. 23783/32311 cut-off events. For 28414/28414 co-relation queries the response was YES. Maximal size of possible extension queue 1249. Compared 194386 event pairs, 1607 based on Foata normal form. 1280/33248 useless extension candidates. Maximal degree in co-relation 71354. Up to 13568 conditions per place. [2024-11-22 13:57:09,614 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 61 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-11-22 13:57:09,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 88 transitions, 410 flow [2024-11-22 13:57:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:57:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:57:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 269 transitions. [2024-11-22 13:57:09,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-11-22 13:57:09,616 INFO L175 Difference]: Start difference. First operand has 83 places, 55 transitions, 208 flow. Second operand 8 states and 269 transitions. [2024-11-22 13:57:09,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 88 transitions, 410 flow [2024-11-22 13:57:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 88 transitions, 389 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-22 13:57:09,639 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 182 flow [2024-11-22 13:57:09,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2024-11-22 13:57:09,640 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-11-22 13:57:09,640 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 182 flow [2024-11-22 13:57:09,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2024-11-22 13:57:09,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:09,640 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:09,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:57:09,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 13:57:09,841 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:57:09,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 123626874, now seen corresponding path program 1 times [2024-11-22 13:57:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231675785] [2024-11-22 13:57:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:57:09,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:57:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:57:09,861 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:57:09,861 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:57:09,861 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:57:09,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:57:09,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-22 13:57:09,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 13:57:09,861 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-22 13:57:09,862 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:57:09,862 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-22 13:57:09,888 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-22 13:57:09,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 62 transitions, 232 flow [2024-11-22 13:57:09,895 INFO L124 PetriNetUnfolderBase]: 14/125 cut-off events. [2024-11-22 13:57:09,896 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-22 13:57:09,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 125 events. 14/125 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 272 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 163. Up to 14 conditions per place. [2024-11-22 13:57:09,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 62 transitions, 232 flow [2024-11-22 13:57:09,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 58 transitions, 218 flow [2024-11-22 13:57:09,898 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:57:09,898 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;@79482a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:57:09,898 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:57:09,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:57:09,899 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-22 13:57:09,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:57:09,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:09,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 13:57:09,899 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:57:09,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash 418040093, now seen corresponding path program 1 times [2024-11-22 13:57:09,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:09,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331568294] [2024-11-22 13:57:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:09,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:09,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:09,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331568294] [2024-11-22 13:57:09,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331568294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:09,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:57:09,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:57:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211865977] [2024-11-22 13:57:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:09,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:57:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:57:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:57:09,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 62 [2024-11-22 13:57:09,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 58 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2024-11-22 13:57:09,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:09,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 62 [2024-11-22 13:57:09,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand