./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/weaver/clever.wvr.c -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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:42:22,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:42:22,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:42:22,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:42:22,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:42:22,348 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:42:22,348 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:42:22,349 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:42:22,349 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:42:22,350 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:42:22,350 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:42:22,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:42:22,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:42:22,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:42:22,352 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:42:22,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:42:22,352 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:42:22,353 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:42:22,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:42:22,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:42:22,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:42:22,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:42:22,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:42:22,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:42:22,356 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:42:22,357 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:42:22,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:42:22,357 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:42:22,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:42:22,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:42:22,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:42:22,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:42:22,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:42:22,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:42:22,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:42:22,359 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:42:22,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:42:22,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:42:22,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:42:22,360 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:42:22,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:42:22,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:42:22,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-09 02:42:22,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:42:22,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:42:22,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:42:22,649 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:42:22,650 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:42:22,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2024-11-09 02:42:24,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:42:24,311 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:42:24,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-09 02:42:24,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f982d5f2/d11bbab4694e48468784485b58b7342b/FLAG257dcca70 [2024-11-09 02:42:24,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f982d5f2/d11bbab4694e48468784485b58b7342b [2024-11-09 02:42:24,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:42:24,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:42:24,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:42:24,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:42:24,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:42:24,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3c69c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24, skipping insertion in model container [2024-11-09 02:42:24,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,362 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:42:24,541 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/weaver/clever.wvr.c[2159,2172] [2024-11-09 02:42:24,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:42:24,552 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:42:24,570 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/weaver/clever.wvr.c[2159,2172] [2024-11-09 02:42:24,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:42:24,588 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:42:24,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24 WrapperNode [2024-11-09 02:42:24,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:42:24,590 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:42:24,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:42:24,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:42:24,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,622 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-09 02:42:24,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:42:24,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:42:24,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:42:24,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:42:24,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,647 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]. [2024-11-09 02:42:24,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:42:24,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:42:24,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:42:24,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:42:24,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (1/1) ... [2024-11-09 02:42:24,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:42:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:24,696 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) [2024-11-09 02:42:24,700 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 [2024-11-09 02:42:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:42:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:42:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:42:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:42:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:42:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:42:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:42:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:42:24,762 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:42:24,871 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:42:24,873 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:42:25,059 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:42:25,059 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:42:25,315 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:42:25,315 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:42:25,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:42:25 BoogieIcfgContainer [2024-11-09 02:42:25,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:42:25,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:42:25,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:42:25,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:42:25,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:42:24" (1/3) ... [2024-11-09 02:42:25,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f7f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:42:25, skipping insertion in model container [2024-11-09 02:42:25,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:42:24" (2/3) ... [2024-11-09 02:42:25,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f7f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:42:25, skipping insertion in model container [2024-11-09 02:42:25,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:42:25" (3/3) ... [2024-11-09 02:42:25,329 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-09 02:42:25,344 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:42:25,344 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:42:25,344 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:42:25,380 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 02:42:25,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-09 02:42:25,440 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-09 02:42:25,441 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:42:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-11-09 02:42:25,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-09 02:42:25,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-09 02:42:25,463 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:42:25,473 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;@f17c195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:42:25,473 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-09 02:42:25,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:42:25,487 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-09 02:42:25,487 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:42:25,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:25,491 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:25,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:25,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-11-09 02:42:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:25,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130599287] [2024-11-09 02:42:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:26,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130599287] [2024-11-09 02:42:26,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130599287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:42:26,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:42:26,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:42:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374294016] [2024-11-09 02:42:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:42:26,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:42:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:42:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:42:26,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:26,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:26,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:26,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:26,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:26,144 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-11-09 02:42:26,144 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-09 02:42:26,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-11-09 02:42:26,149 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-09 02:42:26,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-11-09 02:42:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:42:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:42:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-09 02:42:26,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-09 02:42:26,166 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-11-09 02:42:26,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-11-09 02:42:26,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 02:42:26,172 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-09 02:42:26,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-09 02:42:26,177 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-09 02:42:26,178 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-09 02:42:26,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:26,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:26,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:26,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:42:26,179 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:26,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-11-09 02:42:26,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:26,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79136171] [2024-11-09 02:42:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79136171] [2024-11-09 02:42:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79136171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:42:26,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:42:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:42:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828660256] [2024-11-09 02:42:26,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:42:26,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:42:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:42:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:42:26,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:26,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 02:42:26,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:26,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:26,435 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-11-09 02:42:26,435 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-11-09 02:42:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-11-09 02:42:26,440 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-11-09 02:42:26,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-11-09 02:42:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:42:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:42:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-09 02:42:26,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-09 02:42:26,444 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-11-09 02:42:26,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-11-09 02:42:26,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:42:26,447 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-11-09 02:42:26,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-09 02:42:26,449 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-09 02:42:26,449 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-11-09 02:42:26,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 02:42:26,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:26,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:26,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:42:26,451 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:26,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-11-09 02:42:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:26,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704381012] [2024-11-09 02:42:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:26,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704381012] [2024-11-09 02:42:26,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704381012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:42:26,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:42:26,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:42:26,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420395146] [2024-11-09 02:42:26,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:42:26,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:42:26,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:42:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:42:26,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:26,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 02:42:26,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:26,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:26,651 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-11-09 02:42:26,652 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-11-09 02:42:26,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-11-09 02:42:26,659 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-11-09 02:42:26,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-11-09 02:42:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:42:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:42:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-09 02:42:26,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-09 02:42:26,660 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-11-09 02:42:26,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-11-09 02:42:26,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:42:26,665 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-11-09 02:42:26,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-11-09 02:42:26,666 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-11-09 02:42:26,666 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-11-09 02:42:26,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 02:42:26,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:26,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:26,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:42:26,667 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:26,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-11-09 02:42:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:26,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753227184] [2024-11-09 02:42:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:26,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753227184] [2024-11-09 02:42:26,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753227184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078216321] [2024-11-09 02:42:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:26,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:26,749 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) [2024-11-09 02:42:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:42:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:26,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 02:42:26,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:26,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:26,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078216321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:26,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:26,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-09 02:42:26,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680214703] [2024-11-09 02:42:26,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:26,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 02:42:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 02:42:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 02:42:26,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:26,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-09 02:42:26,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:26,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:26,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:27,112 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-11-09 02:42:27,114 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-11-09 02:42:27,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-11-09 02:42:27,119 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-11-09 02:42:27,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-11-09 02:42:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:42:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:42:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-09 02:42:27,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-09 02:42:27,121 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-11-09 02:42:27,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-11-09 02:42:27,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-09 02:42:27,131 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-11-09 02:42:27,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-09 02:42:27,132 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-11-09 02:42:27,132 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-11-09 02:42:27,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-09 02:42:27,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:27,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:27,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 02:42:27,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:27,339 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:27,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -505918620, now seen corresponding path program 1 times [2024-11-09 02:42:27,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:27,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783937375] [2024-11-09 02:42:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783937375] [2024-11-09 02:42:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783937375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430019091] [2024-11-09 02:42:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:27,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:27,682 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) [2024-11-09 02:42:27,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:42:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:27,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 02:42:27,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:27,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:28,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430019091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:28,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:28,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 02:42:28,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601646613] [2024-11-09 02:42:28,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:28,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 02:42:28,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 02:42:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-09 02:42:28,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:28,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 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) [2024-11-09 02:42:28,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:28,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:28,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:28,422 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-09 02:42:28,423 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-11-09 02:42:28,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 435 events. 249/435 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1668 event pairs, 10 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 176 conditions per place. [2024-11-09 02:42:28,428 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2024-11-09 02:42:28,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 105 transitions, 891 flow [2024-11-09 02:42:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 02:42:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 02:42:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-11-09 02:42:28,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-09 02:42:28,431 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-11-09 02:42:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 105 transitions, 891 flow [2024-11-09 02:42:28,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 881 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-09 02:42:28,438 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 428 flow [2024-11-09 02:42:28,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-09 02:42:28,439 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-09 02:42:28,439 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 428 flow [2024-11-09 02:42:28,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 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) [2024-11-09 02:42:28,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:28,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:28,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 02:42:28,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:28,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:28,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-11-09 02:42:28,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:28,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733654770] [2024-11-09 02:42:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:28,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:28,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733654770] [2024-11-09 02:42:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733654770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:42:28,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:42:28,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:42:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576531850] [2024-11-09 02:42:28,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:42:28,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:42:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:42:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:42:28,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:28,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 02:42:28,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:28,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:28,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:28,792 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2024-11-09 02:42:28,794 INFO L125 PetriNetUnfolderBase]: For 1058/1064 co-relation queries the response was YES. [2024-11-09 02:42:28,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 331 events. 192/331 cut-off events. For 1058/1064 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1120 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1517. Up to 152 conditions per place. [2024-11-09 02:42:28,798 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2024-11-09 02:42:28,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 703 flow [2024-11-09 02:42:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:42:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:42:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-09 02:42:28,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-09 02:42:28,800 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 428 flow. Second operand 5 states and 59 transitions. [2024-11-09 02:42:28,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 703 flow [2024-11-09 02:42:28,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 646 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-09 02:42:28,809 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 464 flow [2024-11-09 02:42:28,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-09 02:42:28,810 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-09 02:42:28,812 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 464 flow [2024-11-09 02:42:28,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 02:42:28,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:28,812 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:28,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 02:42:28,813 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:28,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-11-09 02:42:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:28,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305875616] [2024-11-09 02:42:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:28,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305875616] [2024-11-09 02:42:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305875616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072263489] [2024-11-09 02:42:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:42:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:29,081 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) [2024-11-09 02:42:29,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:42:29,137 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:42:29,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:29,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 02:42:29,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:29,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072263489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:29,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:29,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 02:42:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115331449] [2024-11-09 02:42:29,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:29,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 02:42:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 02:42:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 02:42:29,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:29,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:29,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:29,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:29,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:30,186 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2024-11-09 02:42:30,186 INFO L125 PetriNetUnfolderBase]: For 4195/4195 co-relation queries the response was YES. [2024-11-09 02:42:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 1068 events. 624/1068 cut-off events. For 4195/4195 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5018 event pairs, 41 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4302. Up to 300 conditions per place. [2024-11-09 02:42:30,196 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2024-11-09 02:42:30,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2364 flow [2024-11-09 02:42:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 02:42:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 02:42:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-11-09 02:42:30,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2024-11-09 02:42:30,199 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 464 flow. Second operand 17 states and 223 transitions. [2024-11-09 02:42:30,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2364 flow [2024-11-09 02:42:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2261 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-09 02:42:30,213 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1563 flow [2024-11-09 02:42:30,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1563, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2024-11-09 02:42:30,214 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-11-09 02:42:30,214 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1563 flow [2024-11-09 02:42:30,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:30,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:30,214 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 02:42:30,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:30,416 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:30,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1101021392, now seen corresponding path program 3 times [2024-11-09 02:42:30,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:30,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638230101] [2024-11-09 02:42:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:30,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:30,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638230101] [2024-11-09 02:42:30,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638230101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:30,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540100962] [2024-11-09 02:42:30,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:42:30,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:30,633 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) [2024-11-09 02:42:30,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:42:30,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:42:30,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:30,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 02:42:30,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:30,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:30,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540100962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:30,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:30,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 02:42:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130029525] [2024-11-09 02:42:30,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:30,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 02:42:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 02:42:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-09 02:42:30,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:30,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1563 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:30,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:30,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:31,635 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2024-11-09 02:42:31,635 INFO L125 PetriNetUnfolderBase]: For 11594/11594 co-relation queries the response was YES. [2024-11-09 02:42:31,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12439 conditions, 2300 events. 1342/2300 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12744 event pairs, 114 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11785. Up to 611 conditions per place. [2024-11-09 02:42:31,661 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2024-11-09 02:42:31,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4461 flow [2024-11-09 02:42:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 02:42:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 02:42:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-11-09 02:42:31,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-11-09 02:42:31,664 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1563 flow. Second operand 11 states and 144 transitions. [2024-11-09 02:42:31,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4461 flow [2024-11-09 02:42:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4153 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-11-09 02:42:31,707 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3257 flow [2024-11-09 02:42:31,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3257, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2024-11-09 02:42:31,710 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-09 02:42:31,710 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3257 flow [2024-11-09 02:42:31,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:42:31,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:31,711 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:31,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 02:42:31,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:31,912 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:31,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash 593318763, now seen corresponding path program 1 times [2024-11-09 02:42:31,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:31,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66818061] [2024-11-09 02:42:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:31,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66818061] [2024-11-09 02:42:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66818061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076405776] [2024-11-09 02:42:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:31,983 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) [2024-11-09 02:42:31,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:42:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:32,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 02:42:32,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:32,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:32,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076405776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:32,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:32,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-09 02:42:32,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490566195] [2024-11-09 02:42:32,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:32,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 02:42:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 02:42:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 02:42:32,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:32,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3257 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-09 02:42:32,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:32,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:32,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:33,051 INFO L124 PetriNetUnfolderBase]: 2084/3651 cut-off events. [2024-11-09 02:42:33,052 INFO L125 PetriNetUnfolderBase]: For 24655/24661 co-relation queries the response was YES. [2024-11-09 02:42:33,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21377 conditions, 3651 events. 2084/3651 cut-off events. For 24655/24661 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23277 event pairs, 25 based on Foata normal form. 49/3698 useless extension candidates. Maximal degree in co-relation 20652. Up to 988 conditions per place. [2024-11-09 02:42:33,092 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 382 selfloop transitions, 144 changer transitions 2/531 dead transitions. [2024-11-09 02:42:33,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 531 transitions, 7693 flow [2024-11-09 02:42:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 02:42:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 02:42:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-11-09 02:42:33,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-09 02:42:33,094 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3257 flow. Second operand 12 states and 142 transitions. [2024-11-09 02:42:33,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 531 transitions, 7693 flow [2024-11-09 02:42:33,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 531 transitions, 7538 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-11-09 02:42:33,167 INFO L231 Difference]: Finished difference. Result has 106 places, 333 transitions, 5155 flow [2024-11-09 02:42:33,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5155, PETRI_PLACES=106, PETRI_TRANSITIONS=333} [2024-11-09 02:42:33,170 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-11-09 02:42:33,171 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 333 transitions, 5155 flow [2024-11-09 02:42:33,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-09 02:42:33,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:33,172 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:33,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:42:33,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:33,373 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:33,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1701011657, now seen corresponding path program 2 times [2024-11-09 02:42:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725617059] [2024-11-09 02:42:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725617059] [2024-11-09 02:42:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725617059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170658641] [2024-11-09 02:42:33,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:42:33,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:33,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:42:33,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:42:33,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:42:33,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:33,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 02:42:33,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:33,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:33,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170658641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:33,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:33,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-09 02:42:33,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65768223] [2024-11-09 02:42:33,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:33,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:42:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:42:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:42:33,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:33,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 333 transitions, 5155 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-09 02:42:33,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:33,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:34,679 INFO L124 PetriNetUnfolderBase]: 2369/4322 cut-off events. [2024-11-09 02:42:34,680 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-11-09 02:42:34,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28318 conditions, 4322 events. 2369/4322 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29722 event pairs, 157 based on Foata normal form. 28/4349 useless extension candidates. Maximal degree in co-relation 27966. Up to 1472 conditions per place. [2024-11-09 02:42:34,738 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 312 selfloop transitions, 275 changer transitions 0/590 dead transitions. [2024-11-09 02:42:34,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 590 transitions, 9758 flow [2024-11-09 02:42:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 02:42:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 02:42:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-11-09 02:42:34,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-09 02:42:34,740 INFO L175 Difference]: Start difference. First operand has 106 places, 333 transitions, 5155 flow. Second operand 14 states and 162 transitions. [2024-11-09 02:42:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 590 transitions, 9758 flow [2024-11-09 02:42:34,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 590 transitions, 9355 flow, removed 195 selfloop flow, removed 2 redundant places. [2024-11-09 02:42:34,948 INFO L231 Difference]: Finished difference. Result has 123 places, 432 transitions, 7318 flow [2024-11-09 02:42:34,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7318, PETRI_PLACES=123, PETRI_TRANSITIONS=432} [2024-11-09 02:42:34,950 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2024-11-09 02:42:34,950 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 432 transitions, 7318 flow [2024-11-09 02:42:34,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-09 02:42:34,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:34,951 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:34,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 02:42:35,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:35,152 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:35,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1366077662, now seen corresponding path program 3 times [2024-11-09 02:42:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:35,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763897374] [2024-11-09 02:42:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:35,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:35,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:35,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763897374] [2024-11-09 02:42:35,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763897374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:35,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522366035] [2024-11-09 02:42:35,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:42:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:35,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:42:35,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 02:42:35,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 02:42:35,573 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:35,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:42:35,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:35,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522366035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:36,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-09 02:42:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225117472] [2024-11-09 02:42:36,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:36,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 02:42:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 02:42:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-09 02:42:36,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:36,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 432 transitions, 7318 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 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) [2024-11-09 02:42:36,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:36,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:36,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:38,663 INFO L124 PetriNetUnfolderBase]: 3537/6493 cut-off events. [2024-11-09 02:42:38,664 INFO L125 PetriNetUnfolderBase]: For 72523/72523 co-relation queries the response was YES. [2024-11-09 02:42:38,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45371 conditions, 6493 events. 3537/6493 cut-off events. For 72523/72523 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46387 event pairs, 285 based on Foata normal form. 33/6525 useless extension candidates. Maximal degree in co-relation 44748. Up to 4009 conditions per place. [2024-11-09 02:42:38,823 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 561 selfloop transitions, 230 changer transitions 24/818 dead transitions. [2024-11-09 02:42:38,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 818 transitions, 15019 flow [2024-11-09 02:42:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 02:42:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 02:42:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2024-11-09 02:42:38,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-09 02:42:38,826 INFO L175 Difference]: Start difference. First operand has 123 places, 432 transitions, 7318 flow. Second operand 16 states and 208 transitions. [2024-11-09 02:42:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 818 transitions, 15019 flow [2024-11-09 02:42:39,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 818 transitions, 14640 flow, removed 184 selfloop flow, removed 2 redundant places. [2024-11-09 02:42:39,138 INFO L231 Difference]: Finished difference. Result has 143 places, 606 transitions, 11219 flow [2024-11-09 02:42:39,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11219, PETRI_PLACES=143, PETRI_TRANSITIONS=606} [2024-11-09 02:42:39,138 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-11-09 02:42:39,139 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 606 transitions, 11219 flow [2024-11-09 02:42:39,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 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) [2024-11-09 02:42:39,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:39,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:39,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 02:42:39,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:39,340 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:39,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 4438554, now seen corresponding path program 4 times [2024-11-09 02:42:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272287522] [2024-11-09 02:42:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:39,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272287522] [2024-11-09 02:42:39,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272287522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365863017] [2024-11-09 02:42:39,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:42:39,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:39,669 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:42:39,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 02:42:39,743 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:42:39,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:39,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:42:39,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:44,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:42:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365863017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:44,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:44,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-09 02:42:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787718768] [2024-11-09 02:42:44,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:44,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 02:42:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 02:42:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-11-09 02:42:44,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:44,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 606 transitions, 11219 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-09 02:42:44,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:44,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:44,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:42:55,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 02:42:57,760 INFO L124 PetriNetUnfolderBase]: 4456/8220 cut-off events. [2024-11-09 02:42:57,760 INFO L125 PetriNetUnfolderBase]: For 112633/112633 co-relation queries the response was YES. [2024-11-09 02:42:57,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61388 conditions, 8220 events. 4456/8220 cut-off events. For 112633/112633 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 61841 event pairs, 383 based on Foata normal form. 14/8233 useless extension candidates. Maximal degree in co-relation 60659. Up to 6235 conditions per place. [2024-11-09 02:42:57,855 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 704 selfloop transitions, 236 changer transitions 23/966 dead transitions. [2024-11-09 02:42:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 966 transitions, 19022 flow [2024-11-09 02:42:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 02:42:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 02:42:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 280 transitions. [2024-11-09 02:42:57,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 02:42:57,857 INFO L175 Difference]: Start difference. First operand has 143 places, 606 transitions, 11219 flow. Second operand 21 states and 280 transitions. [2024-11-09 02:42:57,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 966 transitions, 19022 flow [2024-11-09 02:42:58,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 966 transitions, 18376 flow, removed 305 selfloop flow, removed 7 redundant places. [2024-11-09 02:42:58,546 INFO L231 Difference]: Finished difference. Result has 164 places, 790 transitions, 15551 flow [2024-11-09 02:42:58,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10778, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15551, PETRI_PLACES=164, PETRI_TRANSITIONS=790} [2024-11-09 02:42:58,547 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2024-11-09 02:42:58,547 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 790 transitions, 15551 flow [2024-11-09 02:42:58,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-09 02:42:58,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:42:58,548 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:42:58,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 02:42:58,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 02:42:58,748 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:42:58,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:42:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1073773328, now seen corresponding path program 5 times [2024-11-09 02:42:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:42:58,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414936716] [2024-11-09 02:42:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:42:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:42:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:42:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:42:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414936716] [2024-11-09 02:42:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414936716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:42:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265668101] [2024-11-09 02:42:59,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:42:59,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:42:59,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:42:59,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:42:59,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 02:42:59,147 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-09 02:42:59,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:42:59,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:42:59,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:42:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:42:59,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:42:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:42:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265668101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:42:59,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:42:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-09 02:42:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109790486] [2024-11-09 02:42:59,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:42:59,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 02:42:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:42:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 02:42:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-09 02:42:59,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:42:59,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 790 transitions, 15551 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-09 02:42:59,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:42:59,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:42:59,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:03,172 INFO L124 PetriNetUnfolderBase]: 5151/9481 cut-off events. [2024-11-09 02:43:03,173 INFO L125 PetriNetUnfolderBase]: For 151160/151160 co-relation queries the response was YES. [2024-11-09 02:43:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73315 conditions, 9481 events. 5151/9481 cut-off events. For 151160/151160 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 73182 event pairs, 423 based on Foata normal form. 10/9490 useless extension candidates. Maximal degree in co-relation 70285. Up to 4792 conditions per place. [2024-11-09 02:43:03,258 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 438 selfloop transitions, 652 changer transitions 12/1105 dead transitions. [2024-11-09 02:43:03,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 1105 transitions, 23492 flow [2024-11-09 02:43:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 02:43:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 02:43:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 237 transitions. [2024-11-09 02:43:03,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-11-09 02:43:03,261 INFO L175 Difference]: Start difference. First operand has 164 places, 790 transitions, 15551 flow. Second operand 20 states and 237 transitions. [2024-11-09 02:43:03,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 1105 transitions, 23492 flow [2024-11-09 02:43:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1105 transitions, 22650 flow, removed 404 selfloop flow, removed 7 redundant places. [2024-11-09 02:43:04,431 INFO L231 Difference]: Finished difference. Result has 185 places, 1009 transitions, 22388 flow [2024-11-09 02:43:04,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14905, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22388, PETRI_PLACES=185, PETRI_TRANSITIONS=1009} [2024-11-09 02:43:04,432 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2024-11-09 02:43:04,432 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 1009 transitions, 22388 flow [2024-11-09 02:43:04,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-09 02:43:04,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:43:04,433 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:43:04,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 02:43:04,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 02:43:04,634 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:43:04,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:43:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2098924377, now seen corresponding path program 6 times [2024-11-09 02:43:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:43:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774351837] [2024-11-09 02:43:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:43:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:43:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:04,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:43:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774351837] [2024-11-09 02:43:04,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774351837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:43:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903796564] [2024-11-09 02:43:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:43:04,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:43:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:43:04,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:43:04,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 02:43:04,742 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 02:43:04,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:43:04,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 02:43:04,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:43:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:04,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:43:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903796564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:43:04,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:43:04,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-09 02:43:04,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992800303] [2024-11-09 02:43:04,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:43:04,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 02:43:04,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:43:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 02:43:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 02:43:04,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:43:04,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1009 transitions, 22388 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-09 02:43:04,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:43:04,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:43:04,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:08,106 INFO L124 PetriNetUnfolderBase]: 6035/10976 cut-off events. [2024-11-09 02:43:08,106 INFO L125 PetriNetUnfolderBase]: For 199063/199063 co-relation queries the response was YES. [2024-11-09 02:43:08,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91408 conditions, 10976 events. 6035/10976 cut-off events. For 199063/199063 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 86218 event pairs, 443 based on Foata normal form. 146/11121 useless extension candidates. Maximal degree in co-relation 87842. Up to 4519 conditions per place. [2024-11-09 02:43:08,242 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 787 selfloop transitions, 703 changer transitions 0/1493 dead transitions. [2024-11-09 02:43:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1493 transitions, 34157 flow [2024-11-09 02:43:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 02:43:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 02:43:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-11-09 02:43:08,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-09 02:43:08,244 INFO L175 Difference]: Start difference. First operand has 185 places, 1009 transitions, 22388 flow. Second operand 14 states and 163 transitions. [2024-11-09 02:43:08,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1493 transitions, 34157 flow [2024-11-09 02:43:09,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1493 transitions, 33059 flow, removed 540 selfloop flow, removed 5 redundant places. [2024-11-09 02:43:09,665 INFO L231 Difference]: Finished difference. Result has 201 places, 1200 transitions, 28683 flow [2024-11-09 02:43:09,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21418, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28683, PETRI_PLACES=201, PETRI_TRANSITIONS=1200} [2024-11-09 02:43:09,667 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2024-11-09 02:43:09,667 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 1200 transitions, 28683 flow [2024-11-09 02:43:09,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-09 02:43:09,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:43:09,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:43:09,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 02:43:09,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 02:43:09,873 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:43:09,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:43:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1296669065, now seen corresponding path program 7 times [2024-11-09 02:43:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:43:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479484725] [2024-11-09 02:43:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:43:09,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:43:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:43:09,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:43:09,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479484725] [2024-11-09 02:43:09,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479484725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:43:09,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303245853] [2024-11-09 02:43:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 02:43:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:43:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:43:09,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:43:09,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 02:43:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:09,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 02:43:09,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:43:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:10,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:43:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:43:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303245853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:43:10,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:43:10,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-09 02:43:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743152835] [2024-11-09 02:43:10,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:43:10,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:43:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:43:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:43:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:43:10,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:43:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 1200 transitions, 28683 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-09 02:43:10,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:43:10,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:43:10,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:14,196 INFO L124 PetriNetUnfolderBase]: 6481/11704 cut-off events. [2024-11-09 02:43:14,197 INFO L125 PetriNetUnfolderBase]: For 269183/269186 co-relation queries the response was YES. [2024-11-09 02:43:14,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107641 conditions, 11704 events. 6481/11704 cut-off events. For 269183/269186 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92611 event pairs, 48 based on Foata normal form. 66/11768 useless extension candidates. Maximal degree in co-relation 104164. Up to 3277 conditions per place. [2024-11-09 02:43:14,300 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1137 selfloop transitions, 559 changer transitions 0/1699 dead transitions. [2024-11-09 02:43:14,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1699 transitions, 39987 flow [2024-11-09 02:43:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 02:43:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 02:43:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-11-09 02:43:14,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-11-09 02:43:14,302 INFO L175 Difference]: Start difference. First operand has 201 places, 1200 transitions, 28683 flow. Second operand 15 states and 167 transitions. [2024-11-09 02:43:14,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1699 transitions, 39987 flow [2024-11-09 02:43:16,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1699 transitions, 39700 flow, removed 138 selfloop flow, removed 2 redundant places. [2024-11-09 02:43:16,214 INFO L231 Difference]: Finished difference. Result has 215 places, 1281 transitions, 31815 flow [2024-11-09 02:43:16,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28026, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=31815, PETRI_PLACES=215, PETRI_TRANSITIONS=1281} [2024-11-09 02:43:16,216 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2024-11-09 02:43:16,216 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 1281 transitions, 31815 flow [2024-11-09 02:43:16,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-09 02:43:16,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:43:16,216 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:43:16,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 02:43:16,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 02:43:16,417 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:43:16,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:43:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-11-09 02:43:16,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:43:16,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206529834] [2024-11-09 02:43:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:43:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:43:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:43:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206529834] [2024-11-09 02:43:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206529834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:43:16,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625892617] [2024-11-09 02:43:16,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:43:16,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:43:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:43:16,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:43:16,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 02:43:16,806 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:43:16,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:43:16,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:43:16,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:43:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:17,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:43:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:43:17,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625892617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:43:17,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:43:17,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-09 02:43:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104881068] [2024-11-09 02:43:17,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:43:17,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 02:43:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:43:17,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 02:43:17,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-09 02:43:17,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:43:17,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 1281 transitions, 31815 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-11-09 02:43:17,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:43:17,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:43:17,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:23,850 INFO L124 PetriNetUnfolderBase]: 7521/13525 cut-off events. [2024-11-09 02:43:23,850 INFO L125 PetriNetUnfolderBase]: For 350795/350795 co-relation queries the response was YES. [2024-11-09 02:43:23,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131424 conditions, 13525 events. 7521/13525 cut-off events. For 350795/350795 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 109119 event pairs, 531 based on Foata normal form. 18/13542 useless extension candidates. Maximal degree in co-relation 127221. Up to 6408 conditions per place. [2024-11-09 02:43:23,978 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 581 selfloop transitions, 1145 changer transitions 23/1752 dead transitions. [2024-11-09 02:43:23,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1752 transitions, 46638 flow [2024-11-09 02:43:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 02:43:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 02:43:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 286 transitions. [2024-11-09 02:43:23,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-11-09 02:43:23,981 INFO L175 Difference]: Start difference. First operand has 215 places, 1281 transitions, 31815 flow. Second operand 25 states and 286 transitions. [2024-11-09 02:43:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1752 transitions, 46638 flow [2024-11-09 02:43:26,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1752 transitions, 45853 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-11-09 02:43:26,835 INFO L231 Difference]: Finished difference. Result has 246 places, 1615 transitions, 45169 flow [2024-11-09 02:43:26,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31386, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45169, PETRI_PLACES=246, PETRI_TRANSITIONS=1615} [2024-11-09 02:43:26,837 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2024-11-09 02:43:26,837 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 1615 transitions, 45169 flow [2024-11-09 02:43:26,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-11-09 02:43:26,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:43:26,838 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:43:26,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 02:43:27,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 02:43:27,043 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:43:27,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:43:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935858, now seen corresponding path program 9 times [2024-11-09 02:43:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:43:27,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224743879] [2024-11-09 02:43:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:43:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:43:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:27,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:43:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224743879] [2024-11-09 02:43:27,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224743879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:43:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568002096] [2024-11-09 02:43:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:43:27,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:43:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:43:27,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:43:27,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 02:43:27,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:43:27,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:43:27,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:43:27,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:43:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:27,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:43:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:43:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568002096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:43:28,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:43:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-09 02:43:28,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344217781] [2024-11-09 02:43:28,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:43:28,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 02:43:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:43:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 02:43:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-09 02:43:28,171 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:43:28,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 1615 transitions, 45169 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-11-09 02:43:28,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:43:28,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:43:28,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:36,150 INFO L124 PetriNetUnfolderBase]: 8967/16080 cut-off events. [2024-11-09 02:43:36,150 INFO L125 PetriNetUnfolderBase]: For 477642/477645 co-relation queries the response was YES. [2024-11-09 02:43:36,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167755 conditions, 16080 events. 8967/16080 cut-off events. For 477642/477645 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 132951 event pairs, 686 based on Foata normal form. 22/16100 useless extension candidates. Maximal degree in co-relation 165424. Up to 7699 conditions per place. [2024-11-09 02:43:36,331 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 675 selfloop transitions, 1499 changer transitions 29/2206 dead transitions. [2024-11-09 02:43:36,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 2206 transitions, 66084 flow [2024-11-09 02:43:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 02:43:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 02:43:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 304 transitions. [2024-11-09 02:43:36,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-11-09 02:43:36,333 INFO L175 Difference]: Start difference. First operand has 246 places, 1615 transitions, 45169 flow. Second operand 27 states and 304 transitions. [2024-11-09 02:43:36,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 2206 transitions, 66084 flow [2024-11-09 02:43:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 2206 transitions, 62941 flow, removed 1499 selfloop flow, removed 5 redundant places. [2024-11-09 02:43:40,827 INFO L231 Difference]: Finished difference. Result has 280 places, 2061 transitions, 60558 flow [2024-11-09 02:43:40,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=43109, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=60558, PETRI_PLACES=280, PETRI_TRANSITIONS=2061} [2024-11-09 02:43:40,829 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2024-11-09 02:43:40,829 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 2061 transitions, 60558 flow [2024-11-09 02:43:40,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-11-09 02:43:40,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:43:40,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:43:40,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 02:43:41,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 02:43:41,030 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:43:41,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:43:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1974808123, now seen corresponding path program 10 times [2024-11-09 02:43:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:43:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42066487] [2024-11-09 02:43:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:43:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:43:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:43:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:43:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:43:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42066487] [2024-11-09 02:43:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42066487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:43:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676237803] [2024-11-09 02:43:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:43:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:43:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:43:41,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:43:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 02:43:41,144 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:43:41,144 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:43:41,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 02:43:41,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:43:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:43:41,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:43:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:43:41,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676237803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:43:41,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:43:41,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-09 02:43:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270738420] [2024-11-09 02:43:41,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:43:41,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 02:43:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:43:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 02:43:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 02:43:41,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-09 02:43:41,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 2061 transitions, 60558 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:43:41,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:43:41,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-09 02:43:41,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:43:49,651 INFO L124 PetriNetUnfolderBase]: 9111/16043 cut-off events. [2024-11-09 02:43:49,651 INFO L125 PetriNetUnfolderBase]: For 519163/519163 co-relation queries the response was YES. [2024-11-09 02:43:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173683 conditions, 16043 events. 9111/16043 cut-off events. For 519163/519163 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 129414 event pairs, 660 based on Foata normal form. 995/17037 useless extension candidates. Maximal degree in co-relation 172210. Up to 12454 conditions per place. [2024-11-09 02:43:49,884 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1941 selfloop transitions, 480 changer transitions 0/2424 dead transitions. [2024-11-09 02:43:49,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 2424 transitions, 73876 flow [2024-11-09 02:43:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 02:43:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 02:43:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-11-09 02:43:49,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-09 02:43:49,886 INFO L175 Difference]: Start difference. First operand has 280 places, 2061 transitions, 60558 flow. Second operand 13 states and 158 transitions. [2024-11-09 02:43:49,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 2424 transitions, 73876 flow