./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.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 de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:08:21,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:08:21,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:08:21,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:08:21,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:08:21,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:08:21,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:08:21,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:08:21,773 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:08:21,774 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:08:21,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:08:21,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:08:21,775 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:08:21,776 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:08:21,777 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:08:21,777 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:08:21,777 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:08:21,778 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:08:21,778 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:08:21,778 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:08:21,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:08:21,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:08:21,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:08:21,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:08:21,784 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:08:21,785 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:08:21,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:08:21,785 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:08:21,785 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:08:21,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:08:21,786 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:08:21,786 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:08:21,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:08:21,786 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:08:21,786 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:08:21,787 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:08:21,787 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:08:21,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:08:21,788 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:08:21,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:08:21,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:08:21,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:08:21,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2024-10-13 07:08:22,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:08:22,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:08:22,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:08:22,094 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:08:22,099 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:08:22,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2024-10-13 07:08:23,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:08:23,699 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:08:23,700 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2024-10-13 07:08:23,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442e3e9a1/26de7f5351ae46fa8d51da94df5a82a9/FLAG8aabacf73 [2024-10-13 07:08:23,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442e3e9a1/26de7f5351ae46fa8d51da94df5a82a9 [2024-10-13 07:08:23,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:08:23,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:08:23,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:08:23,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:08:23,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:08:23,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:23" (1/1) ... [2024-10-13 07:08:23,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c7824e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:23, skipping insertion in model container [2024-10-13 07:08:23,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:23" (1/1) ... [2024-10-13 07:08:23,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:08:24,059 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2024-10-13 07:08:24,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:08:24,074 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:08:24,097 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2024-10-13 07:08:24,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:08:24,123 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:08:24,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24 WrapperNode [2024-10-13 07:08:24,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:08:24,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:08:24,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:08:24,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:08:24,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,156 INFO L138 Inliner]: procedures = 20, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2024-10-13 07:08:24,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:08:24,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:08:24,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:08:24,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:08:24,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,171 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,187 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-13 07:08:24,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:08:24,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:08:24,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:08:24,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:08:24,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (1/1) ... [2024-10-13 07:08:24,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:08:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:24,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:08:24,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:08:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:08:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:08:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:08:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:08:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:08:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:08:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:08:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:08:24,301 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:08:24,398 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:08:24,401 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:08:24,584 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:08:24,584 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:08:24,718 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:08:24,719 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 07:08:24,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:24 BoogieIcfgContainer [2024-10-13 07:08:24,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:08:24,723 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:08:24,723 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:08:24,727 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:08:24,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:23" (1/3) ... [2024-10-13 07:08:24,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52195e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:24, skipping insertion in model container [2024-10-13 07:08:24,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:24" (2/3) ... [2024-10-13 07:08:24,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52195e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:24, skipping insertion in model container [2024-10-13 07:08:24,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:24" (3/3) ... [2024-10-13 07:08:24,731 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-10-13 07:08:24,749 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:08:24,750 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:08:24,750 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:08:24,805 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:08:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2024-10-13 07:08:24,875 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-13 07:08:24,875 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:08:24,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-13 07:08:24,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2024-10-13 07:08:24,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2024-10-13 07:08:24,893 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:08:24,899 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;@2ce6bfd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:08:24,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:08:24,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:08:24,908 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2024-10-13 07:08:24,908 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:08:24,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:24,909 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:24,909 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:24,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:24,915 INFO L85 PathProgramCache]: Analyzing trace with hash -407976094, now seen corresponding path program 1 times [2024-10-13 07:08:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:24,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938211489] [2024-10-13 07:08:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:24,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:25,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:25,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938211489] [2024-10-13 07:08:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938211489] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:08:25,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:08:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:08:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052433578] [2024-10-13 07:08:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:08:25,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:08:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:08:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:08:25,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:25,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:25,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:25,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:25,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:25,711 INFO L124 PetriNetUnfolderBase]: 68/123 cut-off events. [2024-10-13 07:08:25,711 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-13 07:08:25,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 123 events. 68/123 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 325 event pairs, 22 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2024-10-13 07:08:25,716 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2024-10-13 07:08:25,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2024-10-13 07:08:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:08:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:08:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2024-10-13 07:08:25,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-10-13 07:08:25,734 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 35 transitions. [2024-10-13 07:08:25,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2024-10-13 07:08:25,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:08:25,741 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2024-10-13 07:08:25,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2024-10-13 07:08:25,749 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2024-10-13 07:08:25,750 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2024-10-13 07:08:25,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:25,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:25,751 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:25,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:08:25,752 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:25,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 859169077, now seen corresponding path program 1 times [2024-10-13 07:08:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110763265] [2024-10-13 07:08:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110763265] [2024-10-13 07:08:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110763265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581956505] [2024-10-13 07:08:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:26,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:26,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:26,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:08:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:26,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:08:26,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:26,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581956505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:26,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2024-10-13 07:08:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302309042] [2024-10-13 07:08:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:26,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 07:08:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 07:08:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:08:26,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:26,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:26,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:26,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:26,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:26,807 INFO L124 PetriNetUnfolderBase]: 70/131 cut-off events. [2024-10-13 07:08:26,807 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 07:08:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 131 events. 70/131 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 349 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 104. Up to 70 conditions per place. [2024-10-13 07:08:26,811 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2024-10-13 07:08:26,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 41 transitions, 196 flow [2024-10-13 07:08:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:08:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:08:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2024-10-13 07:08:26,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-10-13 07:08:26,814 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 59 transitions. [2024-10-13 07:08:26,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 41 transitions, 196 flow [2024-10-13 07:08:26,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 41 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:08:26,815 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2024-10-13 07:08:26,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2024-10-13 07:08:26,818 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2024-10-13 07:08:26,818 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2024-10-13 07:08:26,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:26,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:26,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:26,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:08:27,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:27,021 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:27,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2096555247, now seen corresponding path program 2 times [2024-10-13 07:08:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:27,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244421746] [2024-10-13 07:08:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:27,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244421746] [2024-10-13 07:08:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244421746] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495988733] [2024-10-13 07:08:27,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:27,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:27,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:27,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:08:27,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:27,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:08:27,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:27,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495988733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:27,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:27,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-10-13 07:08:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849322405] [2024-10-13 07:08:27,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:27,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:08:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:08:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:08:27,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:27,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:27,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:27,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:27,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:28,024 INFO L124 PetriNetUnfolderBase]: 113/210 cut-off events. [2024-10-13 07:08:28,025 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-10-13 07:08:28,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 210 events. 113/210 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 668 event pairs, 17 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 555. Up to 87 conditions per place. [2024-10-13 07:08:28,028 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 36 selfloop transitions, 17 changer transitions 9/63 dead transitions. [2024-10-13 07:08:28,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 63 transitions, 333 flow [2024-10-13 07:08:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:08:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:08:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-10-13 07:08:28,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-10-13 07:08:28,033 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 10 states and 94 transitions. [2024-10-13 07:08:28,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 63 transitions, 333 flow [2024-10-13 07:08:28,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 63 transitions, 315 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-13 07:08:28,038 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 175 flow [2024-10-13 07:08:28,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-10-13 07:08:28,040 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2024-10-13 07:08:28,041 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 175 flow [2024-10-13 07:08:28,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:28,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:28,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:28,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:08:28,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 07:08:28,246 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:28,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 221933866, now seen corresponding path program 1 times [2024-10-13 07:08:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482360847] [2024-10-13 07:08:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:28,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482360847] [2024-10-13 07:08:28,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482360847] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041015058] [2024-10-13 07:08:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:28,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:28,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:28,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:08:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:28,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:08:28,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:28,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:28,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041015058] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:28,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:28,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-10-13 07:08:28,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223816062] [2024-10-13 07:08:28,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:28,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:08:28,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:08:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:08:28,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:28,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 175 flow. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:28,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:28,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:28,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:28,832 INFO L124 PetriNetUnfolderBase]: 117/221 cut-off events. [2024-10-13 07:08:28,832 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2024-10-13 07:08:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 221 events. 117/221 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 19 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 675. Up to 171 conditions per place. [2024-10-13 07:08:28,835 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 33 selfloop transitions, 6 changer transitions 12/52 dead transitions. [2024-10-13 07:08:28,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 349 flow [2024-10-13 07:08:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:08:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:08:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2024-10-13 07:08:28,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-10-13 07:08:28,837 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 175 flow. Second operand 6 states and 57 transitions. [2024-10-13 07:08:28,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 349 flow [2024-10-13 07:08:28,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 295 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-13 07:08:28,840 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 159 flow [2024-10-13 07:08:28,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-10-13 07:08:28,841 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2024-10-13 07:08:28,841 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 159 flow [2024-10-13 07:08:28,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:28,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:28,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:28,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:08:29,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:29,047 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:29,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash -8456190, now seen corresponding path program 2 times [2024-10-13 07:08:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087513116] [2024-10-13 07:08:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:29,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087513116] [2024-10-13 07:08:29,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087513116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959707021] [2024-10-13 07:08:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:29,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:29,208 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) [2024-10-13 07:08:29,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:08:29,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:29,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:08:29,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:29,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:29,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959707021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:29,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:29,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2024-10-13 07:08:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911751914] [2024-10-13 07:08:29,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:29,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 07:08:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 07:08:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:08:29,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:29,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 159 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:29,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:29,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:29,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:29,794 INFO L124 PetriNetUnfolderBase]: 131/242 cut-off events. [2024-10-13 07:08:29,796 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-10-13 07:08:29,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 242 events. 131/242 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 836 event pairs, 20 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 743. Up to 185 conditions per place. [2024-10-13 07:08:29,801 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 41 selfloop transitions, 17 changer transitions 4/63 dead transitions. [2024-10-13 07:08:29,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 396 flow [2024-10-13 07:08:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:08:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:08:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 82 transitions. [2024-10-13 07:08:29,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-10-13 07:08:29,802 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 159 flow. Second operand 10 states and 82 transitions. [2024-10-13 07:08:29,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 396 flow [2024-10-13 07:08:29,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 385 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:29,808 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 239 flow [2024-10-13 07:08:29,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=239, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-10-13 07:08:29,809 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2024-10-13 07:08:29,810 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 239 flow [2024-10-13 07:08:29,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:29,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:29,811 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:29,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:30,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:30,012 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:30,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1153214561, now seen corresponding path program 3 times [2024-10-13 07:08:30,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:30,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181966247] [2024-10-13 07:08:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181966247] [2024-10-13 07:08:30,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181966247] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906036497] [2024-10-13 07:08:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:30,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:30,204 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) [2024-10-13 07:08:30,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:08:30,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:08:30,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:30,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:08:30,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:30,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906036497] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:30,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-10-13 07:08:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40429018] [2024-10-13 07:08:30,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:30,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:08:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:08:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:08:30,484 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 239 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:30,627 INFO L124 PetriNetUnfolderBase]: 145/265 cut-off events. [2024-10-13 07:08:30,628 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2024-10-13 07:08:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 265 events. 145/265 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 936 event pairs, 26 based on Foata normal form. 2/265 useless extension candidates. Maximal degree in co-relation 880. Up to 209 conditions per place. [2024-10-13 07:08:30,630 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 46 selfloop transitions, 15 changer transitions 6/68 dead transitions. [2024-10-13 07:08:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 474 flow [2024-10-13 07:08:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:08:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:08:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2024-10-13 07:08:30,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:08:30,633 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 239 flow. Second operand 8 states and 72 transitions. [2024-10-13 07:08:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 474 flow [2024-10-13 07:08:30,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 421 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-10-13 07:08:30,640 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 286 flow [2024-10-13 07:08:30,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-10-13 07:08:30,641 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2024-10-13 07:08:30,641 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 286 flow [2024-10-13 07:08:30,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:30,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:30,641 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:30,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:08:30,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:30,842 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:30,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:30,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1342781756, now seen corresponding path program 3 times [2024-10-13 07:08:30,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:30,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837501405] [2024-10-13 07:08:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:30,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837501405] [2024-10-13 07:08:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837501405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077309922] [2024-10-13 07:08:31,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:31,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:31,039 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) [2024-10-13 07:08:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:08:31,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:08:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:31,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:08:31,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:31,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:31,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077309922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:31,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:31,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2024-10-13 07:08:31,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950126199] [2024-10-13 07:08:31,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:31,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 07:08:31,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 07:08:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:08:31,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:31,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:31,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:31,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:31,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:31,536 INFO L124 PetriNetUnfolderBase]: 183/336 cut-off events. [2024-10-13 07:08:31,537 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2024-10-13 07:08:31,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 336 events. 183/336 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1287 event pairs, 33 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 1176. Up to 238 conditions per place. [2024-10-13 07:08:31,541 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 55 selfloop transitions, 22 changer transitions 7/85 dead transitions. [2024-10-13 07:08:31,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 635 flow [2024-10-13 07:08:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:08:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:08:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-10-13 07:08:31,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-13 07:08:31,544 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 286 flow. Second operand 11 states and 93 transitions. [2024-10-13 07:08:31,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 635 flow [2024-10-13 07:08:31,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 585 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-10-13 07:08:31,552 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 386 flow [2024-10-13 07:08:31,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-10-13 07:08:31,553 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2024-10-13 07:08:31,553 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 386 flow [2024-10-13 07:08:31,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:31,554 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:31,554 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:31,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:31,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:31,759 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:31,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 535451419, now seen corresponding path program 1 times [2024-10-13 07:08:31,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:31,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26580196] [2024-10-13 07:08:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:31,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26580196] [2024-10-13 07:08:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26580196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925886540] [2024-10-13 07:08:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:32,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:32,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:32,198 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) [2024-10-13 07:08:32,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:08:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:32,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:32,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:32,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925886540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:33,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:33,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-13 07:08:33,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857671558] [2024-10-13 07:08:33,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:33,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:08:33,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:08:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:08:33,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:33,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 386 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:33,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:33,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:33,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:34,110 INFO L124 PetriNetUnfolderBase]: 253/483 cut-off events. [2024-10-13 07:08:34,110 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2024-10-13 07:08:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 483 events. 253/483 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2175 event pairs, 23 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 1690. Up to 237 conditions per place. [2024-10-13 07:08:34,114 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 50 changer transitions 30/164 dead transitions. [2024-10-13 07:08:34,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 164 transitions, 1170 flow [2024-10-13 07:08:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:08:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:08:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2024-10-13 07:08:34,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2024-10-13 07:08:34,116 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 386 flow. Second operand 24 states and 199 transitions. [2024-10-13 07:08:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 164 transitions, 1170 flow [2024-10-13 07:08:34,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1102 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-10-13 07:08:34,123 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 636 flow [2024-10-13 07:08:34,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=636, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-10-13 07:08:34,124 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2024-10-13 07:08:34,124 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 636 flow [2024-10-13 07:08:34,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:34,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:34,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:34,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:08:34,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:34,330 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:34,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1111703867, now seen corresponding path program 2 times [2024-10-13 07:08:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:34,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551964994] [2024-10-13 07:08:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:34,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551964994] [2024-10-13 07:08:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551964994] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315863260] [2024-10-13 07:08:34,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:34,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:34,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:34,795 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) [2024-10-13 07:08:34,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:08:34,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:34,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:34,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:35,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315863260] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:35,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-13 07:08:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263078494] [2024-10-13 07:08:35,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:35,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:08:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:08:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:08:35,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:35,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 636 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:35,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:35,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:35,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:36,799 INFO L124 PetriNetUnfolderBase]: 283/544 cut-off events. [2024-10-13 07:08:36,799 INFO L125 PetriNetUnfolderBase]: For 2721/2721 co-relation queries the response was YES. [2024-10-13 07:08:36,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 544 events. 283/544 cut-off events. For 2721/2721 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2599 event pairs, 20 based on Foata normal form. 3/545 useless extension candidates. Maximal degree in co-relation 2442. Up to 246 conditions per place. [2024-10-13 07:08:36,805 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 74 changer transitions 16/174 dead transitions. [2024-10-13 07:08:36,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1563 flow [2024-10-13 07:08:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 07:08:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-13 07:08:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 203 transitions. [2024-10-13 07:08:36,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45111111111111113 [2024-10-13 07:08:36,807 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 636 flow. Second operand 25 states and 203 transitions. [2024-10-13 07:08:36,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1563 flow [2024-10-13 07:08:36,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 174 transitions, 1377 flow, removed 74 selfloop flow, removed 12 redundant places. [2024-10-13 07:08:36,823 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 1041 flow [2024-10-13 07:08:36,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1041, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-10-13 07:08:36,825 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2024-10-13 07:08:36,825 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 1041 flow [2024-10-13 07:08:36,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:36,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:36,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:36,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:08:37,026 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,SelfDestructingSolverStorable8 [2024-10-13 07:08:37,026 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:37,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1190352107, now seen corresponding path program 3 times [2024-10-13 07:08:37,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:37,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523078246] [2024-10-13 07:08:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523078246] [2024-10-13 07:08:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523078246] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969350782] [2024-10-13 07:08:37,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:37,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:37,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:37,458 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) [2024-10-13 07:08:37,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:08:37,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:08:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:37,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:37,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:37,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969350782] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:38,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:38,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-13 07:08:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342882371] [2024-10-13 07:08:38,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:38,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:08:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:08:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:08:38,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:38,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 1041 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:38,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:38,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:38,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:39,380 INFO L124 PetriNetUnfolderBase]: 286/554 cut-off events. [2024-10-13 07:08:39,380 INFO L125 PetriNetUnfolderBase]: For 3423/3423 co-relation queries the response was YES. [2024-10-13 07:08:39,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 554 events. 286/554 cut-off events. For 3423/3423 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2648 event pairs, 20 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2787. Up to 252 conditions per place. [2024-10-13 07:08:39,386 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 88 selfloop transitions, 79 changer transitions 14/182 dead transitions. [2024-10-13 07:08:39,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1817 flow [2024-10-13 07:08:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:08:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:08:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 211 transitions. [2024-10-13 07:08:39,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45085470085470086 [2024-10-13 07:08:39,388 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 1041 flow. Second operand 26 states and 211 transitions. [2024-10-13 07:08:39,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1817 flow [2024-10-13 07:08:39,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 182 transitions, 1466 flow, removed 158 selfloop flow, removed 12 redundant places. [2024-10-13 07:08:39,409 INFO L231 Difference]: Finished difference. Result has 122 places, 122 transitions, 1069 flow [2024-10-13 07:08:39,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1069, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2024-10-13 07:08:39,411 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2024-10-13 07:08:39,412 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 1069 flow [2024-10-13 07:08:39,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:39,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:39,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:39,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:08:39,613 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,SelfDestructingSolverStorable9 [2024-10-13 07:08:39,614 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:39,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1252462391, now seen corresponding path program 4 times [2024-10-13 07:08:39,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:39,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983211491] [2024-10-13 07:08:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983211491] [2024-10-13 07:08:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983211491] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550303944] [2024-10-13 07:08:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:08:39,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:39,963 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) [2024-10-13 07:08:39,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:08:40,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:08:40,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:40,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:40,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:40,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550303944] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:41,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148165368] [2024-10-13 07:08:41,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:41,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:41,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:41,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 1069 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:41,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:41,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:41,749 INFO L124 PetriNetUnfolderBase]: 327/630 cut-off events. [2024-10-13 07:08:41,750 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2024-10-13 07:08:41,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 630 events. 327/630 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3108 event pairs, 37 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 3009. Up to 504 conditions per place. [2024-10-13 07:08:41,756 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 131 selfloop transitions, 37 changer transitions 14/183 dead transitions. [2024-10-13 07:08:41,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 183 transitions, 1827 flow [2024-10-13 07:08:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 07:08:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-13 07:08:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2024-10-13 07:08:41,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2024-10-13 07:08:41,758 INFO L175 Difference]: Start difference. First operand has 122 places, 122 transitions, 1069 flow. Second operand 16 states and 131 transitions. [2024-10-13 07:08:41,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 183 transitions, 1827 flow [2024-10-13 07:08:41,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 1577 flow, removed 62 selfloop flow, removed 23 redundant places. [2024-10-13 07:08:41,774 INFO L231 Difference]: Finished difference. Result has 122 places, 144 transitions, 1216 flow [2024-10-13 07:08:41,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1216, PETRI_PLACES=122, PETRI_TRANSITIONS=144} [2024-10-13 07:08:41,775 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2024-10-13 07:08:41,775 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 144 transitions, 1216 flow [2024-10-13 07:08:41,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:41,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:41,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:41,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:41,976 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,SelfDestructingSolverStorable10 [2024-10-13 07:08:41,977 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:41,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash 377701129, now seen corresponding path program 5 times [2024-10-13 07:08:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655838262] [2024-10-13 07:08:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:41,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:42,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:42,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655838262] [2024-10-13 07:08:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655838262] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:42,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656105635] [2024-10-13 07:08:42,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:08:42,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:42,321 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) [2024-10-13 07:08:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:08:42,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:08:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:42,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:42,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:42,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656105635] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:43,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:43,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263909508] [2024-10-13 07:08:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:43,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:43,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:43,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 144 transitions, 1216 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:43,815 INFO L124 PetriNetUnfolderBase]: 344/666 cut-off events. [2024-10-13 07:08:43,815 INFO L125 PetriNetUnfolderBase]: For 2546/2546 co-relation queries the response was YES. [2024-10-13 07:08:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3357 conditions, 666 events. 344/666 cut-off events. For 2546/2546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3356 event pairs, 40 based on Foata normal form. 2/658 useless extension candidates. Maximal degree in co-relation 3254. Up to 510 conditions per place. [2024-10-13 07:08:43,822 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 127 selfloop transitions, 50 changer transitions 11/189 dead transitions. [2024-10-13 07:08:43,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 189 transitions, 1902 flow [2024-10-13 07:08:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:08:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:08:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2024-10-13 07:08:43,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-10-13 07:08:43,823 INFO L175 Difference]: Start difference. First operand has 122 places, 144 transitions, 1216 flow. Second operand 18 states and 136 transitions. [2024-10-13 07:08:43,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 189 transitions, 1902 flow [2024-10-13 07:08:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1804 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:43,842 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1427 flow [2024-10-13 07:08:43,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1427, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-10-13 07:08:43,843 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2024-10-13 07:08:43,843 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1427 flow [2024-10-13 07:08:43,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:43,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:43,844 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:43,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:44,048 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,SelfDestructingSolverStorable11 [2024-10-13 07:08:44,049 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:44,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1150688206, now seen corresponding path program 4 times [2024-10-13 07:08:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:44,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354356284] [2024-10-13 07:08:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354356284] [2024-10-13 07:08:44,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354356284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:44,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860481538] [2024-10-13 07:08:44,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:08:44,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:44,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:44,237 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) [2024-10-13 07:08:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:08:44,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:08:44,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:44,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 07:08:44,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:44,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860481538] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:44,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:44,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2024-10-13 07:08:44,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975148701] [2024-10-13 07:08:44,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:44,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:08:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:08:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:08:44,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:44,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1427 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:44,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:44,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:44,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:45,032 INFO L124 PetriNetUnfolderBase]: 344/658 cut-off events. [2024-10-13 07:08:45,033 INFO L125 PetriNetUnfolderBase]: For 3064/3064 co-relation queries the response was YES. [2024-10-13 07:08:45,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 658 events. 344/658 cut-off events. For 3064/3064 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3270 event pairs, 37 based on Foata normal form. 4/654 useless extension candidates. Maximal degree in co-relation 3436. Up to 539 conditions per place. [2024-10-13 07:08:45,042 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 137 selfloop transitions, 28 changer transitions 25/191 dead transitions. [2024-10-13 07:08:45,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 191 transitions, 2026 flow [2024-10-13 07:08:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:08:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:08:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 109 transitions. [2024-10-13 07:08:45,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-10-13 07:08:45,043 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1427 flow. Second operand 13 states and 109 transitions. [2024-10-13 07:08:45,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 191 transitions, 2026 flow [2024-10-13 07:08:45,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 191 transitions, 1887 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-10-13 07:08:45,069 INFO L231 Difference]: Finished difference. Result has 144 places, 150 transitions, 1323 flow [2024-10-13 07:08:45,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1323, PETRI_PLACES=144, PETRI_TRANSITIONS=150} [2024-10-13 07:08:45,070 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2024-10-13 07:08:45,070 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 150 transitions, 1323 flow [2024-10-13 07:08:45,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:45,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:45,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:45,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 07:08:45,271 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,SelfDestructingSolverStorable12 [2024-10-13 07:08:45,272 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:45,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash 299052889, now seen corresponding path program 6 times [2024-10-13 07:08:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579630582] [2024-10-13 07:08:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:45,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579630582] [2024-10-13 07:08:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579630582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246318346] [2024-10-13 07:08:45,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:08:45,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:45,612 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) [2024-10-13 07:08:45,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:08:45,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:08:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:45,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:45,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:45,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246318346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:46,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003379430] [2024-10-13 07:08:46,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:46,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:46,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 150 transitions, 1323 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:46,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:46,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:47,165 INFO L124 PetriNetUnfolderBase]: 331/630 cut-off events. [2024-10-13 07:08:47,166 INFO L125 PetriNetUnfolderBase]: For 2575/2575 co-relation queries the response was YES. [2024-10-13 07:08:47,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3267 conditions, 630 events. 331/630 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3035 event pairs, 38 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3221. Up to 488 conditions per place. [2024-10-13 07:08:47,171 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 127 selfloop transitions, 49 changer transitions 8/185 dead transitions. [2024-10-13 07:08:47,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 185 transitions, 1846 flow [2024-10-13 07:08:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:08:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:08:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2024-10-13 07:08:47,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-10-13 07:08:47,172 INFO L175 Difference]: Start difference. First operand has 144 places, 150 transitions, 1323 flow. Second operand 17 states and 135 transitions. [2024-10-13 07:08:47,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 185 transitions, 1846 flow [2024-10-13 07:08:47,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 185 transitions, 1768 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-10-13 07:08:47,191 INFO L231 Difference]: Finished difference. Result has 145 places, 153 transitions, 1412 flow [2024-10-13 07:08:47,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1412, PETRI_PLACES=145, PETRI_TRANSITIONS=153} [2024-10-13 07:08:47,191 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2024-10-13 07:08:47,192 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 153 transitions, 1412 flow [2024-10-13 07:08:47,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:47,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:47,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:47,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 07:08:47,395 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,SelfDestructingSolverStorable13 [2024-10-13 07:08:47,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:47,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1434463095, now seen corresponding path program 7 times [2024-10-13 07:08:47,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:47,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616584620] [2024-10-13 07:08:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:47,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616584620] [2024-10-13 07:08:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616584620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:47,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690136630] [2024-10-13 07:08:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:08:47,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:47,717 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) [2024-10-13 07:08:47,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:08:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:47,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:47,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:47,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690136630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:51,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088815858] [2024-10-13 07:08:51,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:51,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:51,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:51,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 153 transitions, 1412 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:51,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:51,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:52,593 INFO L124 PetriNetUnfolderBase]: 378/713 cut-off events. [2024-10-13 07:08:52,593 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2024-10-13 07:08:52,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3954 conditions, 713 events. 378/713 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3563 event pairs, 39 based on Foata normal form. 2/705 useless extension candidates. Maximal degree in co-relation 3910. Up to 583 conditions per place. [2024-10-13 07:08:52,600 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 153 selfloop transitions, 50 changer transitions 8/212 dead transitions. [2024-10-13 07:08:52,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 212 transitions, 2348 flow [2024-10-13 07:08:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:08:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:08:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2024-10-13 07:08:52,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-10-13 07:08:52,601 INFO L175 Difference]: Start difference. First operand has 145 places, 153 transitions, 1412 flow. Second operand 20 states and 146 transitions. [2024-10-13 07:08:52,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 212 transitions, 2348 flow [2024-10-13 07:08:52,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 212 transitions, 2171 flow, removed 53 selfloop flow, removed 14 redundant places. [2024-10-13 07:08:52,625 INFO L231 Difference]: Finished difference. Result has 155 places, 177 transitions, 1757 flow [2024-10-13 07:08:52,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1757, PETRI_PLACES=155, PETRI_TRANSITIONS=177} [2024-10-13 07:08:52,627 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2024-10-13 07:08:52,628 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 177 transitions, 1757 flow [2024-10-13 07:08:52,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:52,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:52,629 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:52,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 07:08:52,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:52,833 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:52,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1351346205, now seen corresponding path program 8 times [2024-10-13 07:08:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578327155] [2024-10-13 07:08:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:53,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578327155] [2024-10-13 07:08:53,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578327155] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100266078] [2024-10-13 07:08:53,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:53,179 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 07:08:53,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:53,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:53,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:53,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:53,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100266078] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:54,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:54,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472971272] [2024-10-13 07:08:54,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:54,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:54,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:54,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 177 transitions, 1757 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:54,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:54,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:54,901 INFO L124 PetriNetUnfolderBase]: 378/717 cut-off events. [2024-10-13 07:08:54,901 INFO L125 PetriNetUnfolderBase]: For 3939/3939 co-relation queries the response was YES. [2024-10-13 07:08:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4099 conditions, 717 events. 378/717 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3609 event pairs, 38 based on Foata normal form. 2/709 useless extension candidates. Maximal degree in co-relation 4051. Up to 585 conditions per place. [2024-10-13 07:08:54,911 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 159 selfloop transitions, 53 changer transitions 7/220 dead transitions. [2024-10-13 07:08:54,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 220 transitions, 2464 flow [2024-10-13 07:08:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 07:08:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-13 07:08:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 167 transitions. [2024-10-13 07:08:54,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4033816425120773 [2024-10-13 07:08:54,913 INFO L175 Difference]: Start difference. First operand has 155 places, 177 transitions, 1757 flow. Second operand 23 states and 167 transitions. [2024-10-13 07:08:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 220 transitions, 2464 flow [2024-10-13 07:08:54,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2256 flow, removed 85 selfloop flow, removed 10 redundant places. [2024-10-13 07:08:54,940 INFO L231 Difference]: Finished difference. Result has 168 places, 182 transitions, 1793 flow [2024-10-13 07:08:54,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1793, PETRI_PLACES=168, PETRI_TRANSITIONS=182} [2024-10-13 07:08:54,941 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2024-10-13 07:08:54,941 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 182 transitions, 1793 flow [2024-10-13 07:08:54,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:54,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:54,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:54,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:55,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:08:55,142 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:55,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2084151915, now seen corresponding path program 9 times [2024-10-13 07:08:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:55,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420579417] [2024-10-13 07:08:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:55,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:55,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420579417] [2024-10-13 07:08:55,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420579417] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119635546] [2024-10-13 07:08:55,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:55,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:55,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:55,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 07:08:55,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:08:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:55,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:55,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:55,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119635546] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:56,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:56,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203421073] [2024-10-13 07:08:56,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:56,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:56,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:56,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 182 transitions, 1793 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:56,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:56,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:56,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:56,812 INFO L124 PetriNetUnfolderBase]: 382/734 cut-off events. [2024-10-13 07:08:56,812 INFO L125 PetriNetUnfolderBase]: For 3787/3787 co-relation queries the response was YES. [2024-10-13 07:08:56,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 734 events. 382/734 cut-off events. For 3787/3787 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3759 event pairs, 40 based on Foata normal form. 3/725 useless extension candidates. Maximal degree in co-relation 4099. Up to 638 conditions per place. [2024-10-13 07:08:56,820 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 168 selfloop transitions, 40 changer transitions 7/216 dead transitions. [2024-10-13 07:08:56,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2420 flow [2024-10-13 07:08:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:08:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:08:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 131 transitions. [2024-10-13 07:08:56,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2024-10-13 07:08:56,822 INFO L175 Difference]: Start difference. First operand has 168 places, 182 transitions, 1793 flow. Second operand 18 states and 131 transitions. [2024-10-13 07:08:56,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2420 flow [2024-10-13 07:08:56,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2246 flow, removed 49 selfloop flow, removed 19 redundant places. [2024-10-13 07:08:56,841 INFO L231 Difference]: Finished difference. Result has 171 places, 187 transitions, 1818 flow [2024-10-13 07:08:56,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1818, PETRI_PLACES=171, PETRI_TRANSITIONS=187} [2024-10-13 07:08:56,842 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2024-10-13 07:08:56,843 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 187 transitions, 1818 flow [2024-10-13 07:08:56,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:56,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:56,843 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:56,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:57,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:08:57,044 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:57,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -714606813, now seen corresponding path program 10 times [2024-10-13 07:08:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:57,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338002755] [2024-10-13 07:08:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:57,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:57,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338002755] [2024-10-13 07:08:57,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338002755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292016542] [2024-10-13 07:08:57,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:08:57,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:57,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:57,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:57,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 07:08:57,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:08:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:57,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:57,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:57,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292016542] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:58,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:58,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:08:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302476611] [2024-10-13 07:08:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:58,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:08:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:08:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:08:58,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:08:58,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 187 transitions, 1818 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:58,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:58,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:08:58,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:58,893 INFO L124 PetriNetUnfolderBase]: 402/763 cut-off events. [2024-10-13 07:08:58,893 INFO L125 PetriNetUnfolderBase]: For 3868/3868 co-relation queries the response was YES. [2024-10-13 07:08:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4369 conditions, 763 events. 402/763 cut-off events. For 3868/3868 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3890 event pairs, 35 based on Foata normal form. 2/751 useless extension candidates. Maximal degree in co-relation 4316. Up to 655 conditions per place. [2024-10-13 07:08:58,900 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 181 selfloop transitions, 41 changer transitions 9/232 dead transitions. [2024-10-13 07:08:58,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 232 transitions, 2609 flow [2024-10-13 07:08:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:08:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:08:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 131 transitions. [2024-10-13 07:08:58,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2024-10-13 07:08:58,902 INFO L175 Difference]: Start difference. First operand has 171 places, 187 transitions, 1818 flow. Second operand 17 states and 131 transitions. [2024-10-13 07:08:58,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 232 transitions, 2609 flow [2024-10-13 07:08:58,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 232 transitions, 2504 flow, removed 28 selfloop flow, removed 12 redundant places. [2024-10-13 07:08:58,918 INFO L231 Difference]: Finished difference. Result has 180 places, 200 transitions, 2038 flow [2024-10-13 07:08:58,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2038, PETRI_PLACES=180, PETRI_TRANSITIONS=200} [2024-10-13 07:08:58,919 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 160 predicate places. [2024-10-13 07:08:58,919 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 200 transitions, 2038 flow [2024-10-13 07:08:58,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:58,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:58,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:58,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:59,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 07:08:59,120 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:08:59,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 915556707, now seen corresponding path program 11 times [2024-10-13 07:08:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235241694] [2024-10-13 07:08:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:59,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235241694] [2024-10-13 07:08:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235241694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390569195] [2024-10-13 07:08:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:08:59,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:59,487 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:08:59,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 07:08:59,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:08:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:59,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:08:59,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:59,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390569195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:00,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683561588] [2024-10-13 07:09:00,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:00,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:00,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 200 transitions, 2038 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:00,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:00,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:00,875 INFO L124 PetriNetUnfolderBase]: 424/808 cut-off events. [2024-10-13 07:09:00,875 INFO L125 PetriNetUnfolderBase]: For 5780/5780 co-relation queries the response was YES. [2024-10-13 07:09:00,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 808 events. 424/808 cut-off events. For 5780/5780 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4198 event pairs, 40 based on Foata normal form. 2/796 useless extension candidates. Maximal degree in co-relation 4873. Up to 652 conditions per place. [2024-10-13 07:09:00,884 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 179 selfloop transitions, 56 changer transitions 9/245 dead transitions. [2024-10-13 07:09:00,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 245 transitions, 2941 flow [2024-10-13 07:09:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:09:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:09:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 151 transitions. [2024-10-13 07:09:00,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-10-13 07:09:00,885 INFO L175 Difference]: Start difference. First operand has 180 places, 200 transitions, 2038 flow. Second operand 21 states and 151 transitions. [2024-10-13 07:09:00,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 245 transitions, 2941 flow [2024-10-13 07:09:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 245 transitions, 2763 flow, removed 65 selfloop flow, removed 12 redundant places. [2024-10-13 07:09:00,924 INFO L231 Difference]: Finished difference. Result has 192 places, 210 transitions, 2254 flow [2024-10-13 07:09:00,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2254, PETRI_PLACES=192, PETRI_TRANSITIONS=210} [2024-10-13 07:09:00,925 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 172 predicate places. [2024-10-13 07:09:00,925 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 210 transitions, 2254 flow [2024-10-13 07:09:00,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:00,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:00,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:01,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:01,126 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:01,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1287416163, now seen corresponding path program 12 times [2024-10-13 07:09:01,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:01,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060598257] [2024-10-13 07:09:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:01,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:01,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060598257] [2024-10-13 07:09:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060598257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796913951] [2024-10-13 07:09:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:09:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:01,407 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 07:09:01,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:09:01,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:01,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:01,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:01,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:02,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796913951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:02,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:02,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26628307] [2024-10-13 07:09:02,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:02,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:02,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:02,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 210 transitions, 2254 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:06,460 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 [] [2024-10-13 07:09:10,693 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 [] [2024-10-13 07:09:11,091 INFO L124 PetriNetUnfolderBase]: 474/905 cut-off events. [2024-10-13 07:09:11,092 INFO L125 PetriNetUnfolderBase]: For 7827/7827 co-relation queries the response was YES. [2024-10-13 07:09:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 905 events. 474/905 cut-off events. For 7827/7827 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4890 event pairs, 37 based on Foata normal form. 3/896 useless extension candidates. Maximal degree in co-relation 5559. Up to 682 conditions per place. [2024-10-13 07:09:11,108 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 194 selfloop transitions, 70 changer transitions 27/292 dead transitions. [2024-10-13 07:09:11,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 292 transitions, 3520 flow [2024-10-13 07:09:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:09:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:09:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 183 transitions. [2024-10-13 07:09:11,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-10-13 07:09:11,110 INFO L175 Difference]: Start difference. First operand has 192 places, 210 transitions, 2254 flow. Second operand 24 states and 183 transitions. [2024-10-13 07:09:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 292 transitions, 3520 flow [2024-10-13 07:09:11,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 292 transitions, 3282 flow, removed 87 selfloop flow, removed 17 redundant places. [2024-10-13 07:09:11,144 INFO L231 Difference]: Finished difference. Result has 206 places, 235 transitions, 2559 flow [2024-10-13 07:09:11,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2559, PETRI_PLACES=206, PETRI_TRANSITIONS=235} [2024-10-13 07:09:11,145 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places. [2024-10-13 07:09:11,145 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 235 transitions, 2559 flow [2024-10-13 07:09:11,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:11,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:11,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:11,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:11,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:11,346 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:11,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -892138867, now seen corresponding path program 13 times [2024-10-13 07:09:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:11,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107839348] [2024-10-13 07:09:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:11,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107839348] [2024-10-13 07:09:11,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107839348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66693546] [2024-10-13 07:09:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:09:11,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:11,664 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 07:09:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:11,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:11,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:11,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66693546] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:12,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:12,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484748307] [2024-10-13 07:09:12,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:12,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:12,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:12,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 2559 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:12,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:12,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:12,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:13,318 INFO L124 PetriNetUnfolderBase]: 489/926 cut-off events. [2024-10-13 07:09:13,318 INFO L125 PetriNetUnfolderBase]: For 9984/9984 co-relation queries the response was YES. [2024-10-13 07:09:13,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 926 events. 489/926 cut-off events. For 9984/9984 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 4979 event pairs, 43 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 6069. Up to 783 conditions per place. [2024-10-13 07:09:13,326 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 214 selfloop transitions, 54 changer transitions 8/277 dead transitions. [2024-10-13 07:09:13,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 277 transitions, 3647 flow [2024-10-13 07:09:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:09:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:09:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2024-10-13 07:09:13,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-10-13 07:09:13,328 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 2559 flow. Second operand 17 states and 126 transitions. [2024-10-13 07:09:13,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 277 transitions, 3647 flow [2024-10-13 07:09:13,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 277 transitions, 3344 flow, removed 130 selfloop flow, removed 11 redundant places. [2024-10-13 07:09:13,372 INFO L231 Difference]: Finished difference. Result has 212 places, 248 transitions, 2769 flow [2024-10-13 07:09:13,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2769, PETRI_PLACES=212, PETRI_TRANSITIONS=248} [2024-10-13 07:09:13,372 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2024-10-13 07:09:13,372 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 248 transitions, 2769 flow [2024-10-13 07:09:13,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:13,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:13,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:13,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:13,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-13 07:09:13,573 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:13,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 836908467, now seen corresponding path program 14 times [2024-10-13 07:09:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:13,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813989889] [2024-10-13 07:09:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813989889] [2024-10-13 07:09:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813989889] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467665849] [2024-10-13 07:09:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:09:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:13,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:13,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 07:09:13,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:09:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:13,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:13,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:14,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467665849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:15,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280986066] [2024-10-13 07:09:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:15,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:15,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 248 transitions, 2769 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:15,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:15,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:15,708 INFO L124 PetriNetUnfolderBase]: 488/928 cut-off events. [2024-10-13 07:09:15,709 INFO L125 PetriNetUnfolderBase]: For 9242/9242 co-relation queries the response was YES. [2024-10-13 07:09:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 928 events. 488/928 cut-off events. For 9242/9242 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5026 event pairs, 39 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 5967. Up to 774 conditions per place. [2024-10-13 07:09:15,717 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 222 selfloop transitions, 57 changer transitions 8/288 dead transitions. [2024-10-13 07:09:15,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 288 transitions, 3568 flow [2024-10-13 07:09:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:09:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:09:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 164 transitions. [2024-10-13 07:09:15,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-10-13 07:09:15,719 INFO L175 Difference]: Start difference. First operand has 212 places, 248 transitions, 2769 flow. Second operand 22 states and 164 transitions. [2024-10-13 07:09:15,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 288 transitions, 3568 flow [2024-10-13 07:09:15,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 288 transitions, 3280 flow, removed 119 selfloop flow, removed 10 redundant places. [2024-10-13 07:09:15,770 INFO L231 Difference]: Finished difference. Result has 224 places, 251 transitions, 2714 flow [2024-10-13 07:09:15,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2714, PETRI_PLACES=224, PETRI_TRANSITIONS=251} [2024-10-13 07:09:15,771 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2024-10-13 07:09:15,771 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 251 transitions, 2714 flow [2024-10-13 07:09:15,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:15,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:15,771 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:15,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-13 07:09:15,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-13 07:09:15,972 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:15,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2086671125, now seen corresponding path program 15 times [2024-10-13 07:09:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:15,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384046424] [2024-10-13 07:09:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:16,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384046424] [2024-10-13 07:09:16,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384046424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:16,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755171579] [2024-10-13 07:09:16,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:09:16,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:16,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:16,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:16,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 07:09:16,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:09:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:16,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:16,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:16,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755171579] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:16,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-13 07:09:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625596531] [2024-10-13 07:09:16,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:16,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:09:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:09:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:09:16,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:16,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 251 transitions, 2714 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:16,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:16,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:17,782 INFO L124 PetriNetUnfolderBase]: 529/1006 cut-off events. [2024-10-13 07:09:17,782 INFO L125 PetriNetUnfolderBase]: For 13642/13642 co-relation queries the response was YES. [2024-10-13 07:09:17,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6897 conditions, 1006 events. 529/1006 cut-off events. For 13642/13642 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5547 event pairs, 40 based on Foata normal form. 3/991 useless extension candidates. Maximal degree in co-relation 6830. Up to 736 conditions per place. [2024-10-13 07:09:17,795 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 208 selfloop transitions, 96 changer transitions 13/318 dead transitions. [2024-10-13 07:09:17,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 318 transitions, 4216 flow [2024-10-13 07:09:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:09:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:09:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 187 transitions. [2024-10-13 07:09:17,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2024-10-13 07:09:17,797 INFO L175 Difference]: Start difference. First operand has 224 places, 251 transitions, 2714 flow. Second operand 24 states and 187 transitions. [2024-10-13 07:09:17,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 318 transitions, 4216 flow [2024-10-13 07:09:17,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 318 transitions, 3973 flow, removed 85 selfloop flow, removed 19 redundant places. [2024-10-13 07:09:17,860 INFO L231 Difference]: Finished difference. Result has 233 places, 271 transitions, 3293 flow [2024-10-13 07:09:17,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3293, PETRI_PLACES=233, PETRI_TRANSITIONS=271} [2024-10-13 07:09:17,860 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2024-10-13 07:09:17,860 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 271 transitions, 3293 flow [2024-10-13 07:09:17,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:17,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:17,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:17,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-13 07:09:18,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:18,062 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:18,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2129647931, now seen corresponding path program 16 times [2024-10-13 07:09:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582110152] [2024-10-13 07:09:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582110152] [2024-10-13 07:09:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582110152] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953378052] [2024-10-13 07:09:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:09:18,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:18,423 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:18,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-13 07:09:18,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:09:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:18,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:18,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:18,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953378052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:18,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-13 07:09:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310746241] [2024-10-13 07:09:18,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:18,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:09:18,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:09:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:09:18,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:18,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 271 transitions, 3293 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:18,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:19,909 INFO L124 PetriNetUnfolderBase]: 528/1013 cut-off events. [2024-10-13 07:09:19,909 INFO L125 PetriNetUnfolderBase]: For 14478/14478 co-relation queries the response was YES. [2024-10-13 07:09:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 1013 events. 528/1013 cut-off events. For 14478/14478 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5629 event pairs, 39 based on Foata normal form. 3/998 useless extension candidates. Maximal degree in co-relation 7084. Up to 740 conditions per place. [2024-10-13 07:09:19,918 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 214 selfloop transitions, 101 changer transitions 12/328 dead transitions. [2024-10-13 07:09:19,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 4569 flow [2024-10-13 07:09:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:09:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:09:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 202 transitions. [2024-10-13 07:09:19,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-10-13 07:09:19,920 INFO L175 Difference]: Start difference. First operand has 233 places, 271 transitions, 3293 flow. Second operand 26 states and 202 transitions. [2024-10-13 07:09:19,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 4569 flow [2024-10-13 07:09:19,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 328 transitions, 3820 flow, removed 345 selfloop flow, removed 9 redundant places. [2024-10-13 07:09:19,973 INFO L231 Difference]: Finished difference. Result has 249 places, 278 transitions, 3209 flow [2024-10-13 07:09:19,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3209, PETRI_PLACES=249, PETRI_TRANSITIONS=278} [2024-10-13 07:09:19,974 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2024-10-13 07:09:19,974 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 278 transitions, 3209 flow [2024-10-13 07:09:19,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:19,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:19,974 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:19,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:20,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:20,175 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:20,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1672959803, now seen corresponding path program 17 times [2024-10-13 07:09:20,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:20,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269820521] [2024-10-13 07:09:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:20,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:20,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269820521] [2024-10-13 07:09:20,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269820521] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:20,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465504071] [2024-10-13 07:09:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:09:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:20,459 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-13 07:09:20,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:09:20,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:20,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:20,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:20,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465504071] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:21,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965097151] [2024-10-13 07:09:21,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:21,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:21,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:21,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 278 transitions, 3209 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:21,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:21,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:21,814 INFO L124 PetriNetUnfolderBase]: 532/1025 cut-off events. [2024-10-13 07:09:21,814 INFO L125 PetriNetUnfolderBase]: For 10404/10404 co-relation queries the response was YES. [2024-10-13 07:09:21,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6752 conditions, 1025 events. 532/1025 cut-off events. For 10404/10404 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5765 event pairs, 47 based on Foata normal form. 3/1008 useless extension candidates. Maximal degree in co-relation 6677. Up to 928 conditions per place. [2024-10-13 07:09:21,823 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 260 selfloop transitions, 40 changer transitions 7/308 dead transitions. [2024-10-13 07:09:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 308 transitions, 4051 flow [2024-10-13 07:09:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 07:09:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-13 07:09:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2024-10-13 07:09:21,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-10-13 07:09:21,824 INFO L175 Difference]: Start difference. First operand has 249 places, 278 transitions, 3209 flow. Second operand 16 states and 117 transitions. [2024-10-13 07:09:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 308 transitions, 4051 flow [2024-10-13 07:09:21,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 308 transitions, 3710 flow, removed 110 selfloop flow, removed 20 redundant places. [2024-10-13 07:09:21,896 INFO L231 Difference]: Finished difference. Result has 247 places, 283 transitions, 3089 flow [2024-10-13 07:09:21,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3089, PETRI_PLACES=247, PETRI_TRANSITIONS=283} [2024-10-13 07:09:21,897 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2024-10-13 07:09:21,897 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 283 transitions, 3089 flow [2024-10-13 07:09:21,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:21,897 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:21,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:21,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:22,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-13 07:09:22,098 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:22,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:22,099 INFO L85 PathProgramCache]: Analyzing trace with hash -813490627, now seen corresponding path program 18 times [2024-10-13 07:09:22,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407807450] [2024-10-13 07:09:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407807450] [2024-10-13 07:09:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407807450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047378027] [2024-10-13 07:09:22,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:09:22,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:22,400 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:22,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-13 07:09:22,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:09:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:22,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:09:22,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:22,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047378027] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:23,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:23,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:09:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709346274] [2024-10-13 07:09:23,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:23,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:23,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:23,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 283 transitions, 3089 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:23,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:23,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:23,911 INFO L124 PetriNetUnfolderBase]: 530/1021 cut-off events. [2024-10-13 07:09:23,911 INFO L125 PetriNetUnfolderBase]: For 8419/8419 co-relation queries the response was YES. [2024-10-13 07:09:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6495 conditions, 1021 events. 530/1021 cut-off events. For 8419/8419 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5700 event pairs, 44 based on Foata normal form. 2/999 useless extension candidates. Maximal degree in co-relation 6418. Up to 872 conditions per place. [2024-10-13 07:09:23,922 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 248 selfloop transitions, 59 changer transitions 7/315 dead transitions. [2024-10-13 07:09:23,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 315 transitions, 3932 flow [2024-10-13 07:09:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:09:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:09:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2024-10-13 07:09:23,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-10-13 07:09:23,924 INFO L175 Difference]: Start difference. First operand has 247 places, 283 transitions, 3089 flow. Second operand 18 states and 136 transitions. [2024-10-13 07:09:23,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 315 transitions, 3932 flow [2024-10-13 07:09:23,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 315 transitions, 3775 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-10-13 07:09:23,990 INFO L231 Difference]: Finished difference. Result has 254 places, 286 transitions, 3162 flow [2024-10-13 07:09:23,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3162, PETRI_PLACES=254, PETRI_TRANSITIONS=286} [2024-10-13 07:09:23,991 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2024-10-13 07:09:23,992 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 286 transitions, 3162 flow [2024-10-13 07:09:23,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:23,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:23,992 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:24,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-13 07:09:24,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-13 07:09:24,193 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:24,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 81618300, now seen corresponding path program 19 times [2024-10-13 07:09:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775259567] [2024-10-13 07:09:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:24,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775259567] [2024-10-13 07:09:24,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775259567] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819879015] [2024-10-13 07:09:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:09:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:24,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-13 07:09:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:24,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:09:24,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:25,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819879015] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:26,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:26,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-10-13 07:09:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938521988] [2024-10-13 07:09:26,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:26,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:09:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:09:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:09:26,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-13 07:09:26,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 286 transitions, 3162 flow. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-13 07:09:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:29,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:09:32,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:09:37,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:09:41,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:09:45,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []