./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/clever.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/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:08:13,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:08:13,780 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:08:13,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:08:13,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:08:13,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:08:13,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:08:13,811 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:08:13,812 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:08:13,813 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:08:13,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:08:13,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:08:13,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:08:13,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:08:13,816 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:08:13,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:08:13,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:08:13,817 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:08:13,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:08:13,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:08:13,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:08:13,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:08:13,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:08:13,821 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:08:13,821 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:08:13,821 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:08:13,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:08:13,821 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:08:13,822 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:08:13,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:08:13,822 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:08:13,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:08:13,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:08:13,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:08:13,823 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:08:13,823 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:08:13,823 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:08:13,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:08:13,824 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:08:13,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:08:13,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:08:13,824 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:08:13,825 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-10-13 07:08:14,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:08:14,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:08:14,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:08:14,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:08:14,067 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:08:14,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-10-13 07:08:15,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:08:15,665 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:08:15,666 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-10-13 07:08:15,672 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1e99bdb/fdd8f2270b7344f798c9e5669c5b6f69/FLAGd45330bc0 [2024-10-13 07:08:15,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1e99bdb/fdd8f2270b7344f798c9e5669c5b6f69 [2024-10-13 07:08:15,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:08:15,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:08:15,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:08:15,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:08:15,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:08:15,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7524c1f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15, skipping insertion in model container [2024-10-13 07:08:15,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,709 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:08:15,840 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/clever.wvr.c[2159,2172] [2024-10-13 07:08:15,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:08:15,850 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:08:15,865 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/clever.wvr.c[2159,2172] [2024-10-13 07:08:15,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:08:15,878 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:08:15,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15 WrapperNode [2024-10-13 07:08:15,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:08:15,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:08:15,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:08:15,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:08:15,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,905 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-10-13 07:08:15,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:08:15,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:08:15,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:08:15,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:08:15,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,926 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 07:08:15,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:08:15,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:08:15,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:08:15,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:08:15,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (1/1) ... [2024-10-13 07:08:15,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:08:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:15,965 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 07:08:15,990 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 07:08:16,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:08:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:08:16,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:08:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:08:16,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:08:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:08:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:08:16,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:08:16,051 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 07:08:16,121 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:08:16,123 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:08:16,252 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:08:16,253 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:08:16,415 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:08:16,415 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 07:08:16,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:16 BoogieIcfgContainer [2024-10-13 07:08:16,420 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:08:16,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:08:16,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:08:16,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:08:16,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:15" (1/3) ... [2024-10-13 07:08:16,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5401fd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:16, skipping insertion in model container [2024-10-13 07:08:16,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:15" (2/3) ... [2024-10-13 07:08:16,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5401fd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:16, skipping insertion in model container [2024-10-13 07:08:16,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:16" (3/3) ... [2024-10-13 07:08:16,437 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-10-13 07:08:16,469 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:08:16,470 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:08:16,470 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:08:16,526 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:08:16,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-13 07:08:16,620 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-13 07:08:16,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:08:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-10-13 07:08:16,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-13 07:08:16,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-13 07:08:16,655 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:08:16,676 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;@9cee1f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:08:16,677 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:08:16,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:08:16,698 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-13 07:08:16,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:08:16,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:16,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:16,700 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 07:08:16,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-10-13 07:08:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376853839] [2024-10-13 07:08:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:17,310 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 07:08:17,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376853839] [2024-10-13 07:08:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376853839] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:08:17,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:08:17,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:08:17,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767123556] [2024-10-13 07:08:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:08:17,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:08:17,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:08:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:08:17,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:17,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:17,420 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-10-13 07:08:17,420 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 07:08:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-10-13 07:08:17,424 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-10-13 07:08:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-10-13 07:08:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:08:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:08:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-13 07:08:17,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-10-13 07:08:17,460 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-10-13 07:08:17,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-10-13 07:08:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:08:17,469 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-10-13 07:08:17,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-10-13 07:08:17,478 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-13 07:08:17,478 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-10-13 07:08:17,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:17,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:17,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:17,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:08:17,479 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 07:08:17,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-10-13 07:08:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189978097] [2024-10-13 07:08:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:17,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189978097] [2024-10-13 07:08:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189978097] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:08:17,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:08:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:08:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854099943] [2024-10-13 07:08:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:08:17,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:08:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:08:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:08:17,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:17,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:17,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:17,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:17,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:17,693 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-10-13 07:08:17,694 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-10-13 07:08:17,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-10-13 07:08:17,698 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-10-13 07:08:17,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-10-13 07:08:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:08:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:08:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-13 07:08:17,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-10-13 07:08:17,700 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-10-13 07:08:17,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-10-13 07:08:17,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:08:17,703 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-10-13 07:08:17,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-10-13 07:08:17,704 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-10-13 07:08:17,704 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-10-13 07:08:17,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:17,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:17,704 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:17,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:08:17,705 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 07:08:17,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-10-13 07:08:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355629841] [2024-10-13 07:08:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:17,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:17,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355629841] [2024-10-13 07:08:17,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355629841] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:08:17,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:08:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:08:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321088297] [2024-10-13 07:08:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:08:17,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:08:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:08:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:08:17,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:17,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:17,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:17,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:17,990 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-10-13 07:08:17,990 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-10-13 07:08:17,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-10-13 07:08:17,997 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-10-13 07:08:17,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-10-13 07:08:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:08:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:08:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-10-13 07:08:18,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-13 07:08:18,001 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-10-13 07:08:18,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-10-13 07:08:18,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:08:18,008 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-10-13 07:08:18,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-10-13 07:08:18,011 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-10-13 07:08:18,011 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-10-13 07:08:18,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:18,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:18,012 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:18,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:08:18,013 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 07:08:18,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-10-13 07:08:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563851418] [2024-10-13 07:08:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563851418] [2024-10-13 07:08:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563851418] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101228982] [2024-10-13 07:08:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:18,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:18,138 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 07:08:18,140 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 07:08:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:18,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 07:08:18,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:18,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101228982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:18,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:18,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-13 07:08:18,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122768056] [2024-10-13 07:08:18,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:18,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:08:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:08:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:08:18,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:18,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:18,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:18,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:18,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:18,460 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-10-13 07:08:18,460 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-10-13 07:08:18,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-10-13 07:08:18,463 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-10-13 07:08:18,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-10-13 07:08:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:08:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:08:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-13 07:08:18,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-13 07:08:18,464 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-10-13 07:08:18,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-10-13 07:08:18,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-13 07:08:18,467 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-10-13 07:08:18,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-13 07:08:18,468 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-10-13 07:08:18,468 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-10-13 07:08:18,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:18,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:18,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:18,484 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 07:08:18,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:18,670 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 07:08:18,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -505918620, now seen corresponding path program 1 times [2024-10-13 07:08:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:18,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051528438] [2024-10-13 07:08:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:18,961 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 07:08:18,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:18,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051528438] [2024-10-13 07:08:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051528438] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:18,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11066532] [2024-10-13 07:08:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:18,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:18,964 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 07:08:18,967 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 07:08:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:19,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:08:19,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:19,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11066532] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:19,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-13 07:08:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455291051] [2024-10-13 07:08:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:19,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:08:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:08:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:08:19,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:19,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:19,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:19,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:19,556 INFO L124 PetriNetUnfolderBase]: 261/447 cut-off events. [2024-10-13 07:08:19,557 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-10-13 07:08:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 447 events. 261/447 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1687 event pairs, 10 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 188 conditions per place. [2024-10-13 07:08:19,564 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 23 changer transitions 7/107 dead transitions. [2024-10-13 07:08:19,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 107 transitions, 903 flow [2024-10-13 07:08:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:08:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:08:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-10-13 07:08:19,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-13 07:08:19,567 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-10-13 07:08:19,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 107 transitions, 903 flow [2024-10-13 07:08:19,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 893 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:19,581 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 485 flow [2024-10-13 07:08:19,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2024-10-13 07:08:19,584 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2024-10-13 07:08:19,584 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 485 flow [2024-10-13 07:08:19,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:19,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:19,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:19,601 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 07:08:19,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:19,786 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 07:08:19,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-10-13 07:08:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535886952] [2024-10-13 07:08:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:19,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535886952] [2024-10-13 07:08:19,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535886952] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:08:19,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:08:19,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:08:19,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412563434] [2024-10-13 07:08:19,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:08:19,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:08:19,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:08:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:08:19,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:19,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:19,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:19,958 INFO L124 PetriNetUnfolderBase]: 247/423 cut-off events. [2024-10-13 07:08:19,958 INFO L125 PetriNetUnfolderBase]: For 1283/1307 co-relation queries the response was YES. [2024-10-13 07:08:19,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 423 events. 247/423 cut-off events. For 1283/1307 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1538 event pairs, 33 based on Foata normal form. 6/426 useless extension candidates. Maximal degree in co-relation 1826. Up to 185 conditions per place. [2024-10-13 07:08:19,963 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 57 selfloop transitions, 13 changer transitions 5/78 dead transitions. [2024-10-13 07:08:19,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 791 flow [2024-10-13 07:08:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:08:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:08:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-13 07:08:19,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-13 07:08:19,966 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 485 flow. Second operand 5 states and 59 transitions. [2024-10-13 07:08:19,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 791 flow [2024-10-13 07:08:19,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 742 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-10-13 07:08:19,973 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 518 flow [2024-10-13 07:08:19,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-10-13 07:08:19,975 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2024-10-13 07:08:19,976 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 518 flow [2024-10-13 07:08:19,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:19,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:19,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:19,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 07:08:19,976 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 07:08:19,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-10-13 07:08:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:19,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461156900] [2024-10-13 07:08:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:20,250 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 07:08:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461156900] [2024-10-13 07:08:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461156900] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859753805] [2024-10-13 07:08:20,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:20,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:20,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:20,253 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 07:08:20,254 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 07:08:20,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:20,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:20,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:08:20,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:20,445 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 07:08:20,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:20,543 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 07:08:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859753805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:20,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:20,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-13 07:08:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670315615] [2024-10-13 07:08:20,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:20,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:08:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:08:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:08:20,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:20,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 518 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:20,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:20,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:20,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:21,191 INFO L124 PetriNetUnfolderBase]: 729/1242 cut-off events. [2024-10-13 07:08:21,191 INFO L125 PetriNetUnfolderBase]: For 4696/4696 co-relation queries the response was YES. [2024-10-13 07:08:21,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5856 conditions, 1242 events. 729/1242 cut-off events. For 4696/4696 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6016 event pairs, 46 based on Foata normal form. 8/1249 useless extension candidates. Maximal degree in co-relation 5138. Up to 333 conditions per place. [2024-10-13 07:08:21,201 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 146 selfloop transitions, 96 changer transitions 12/257 dead transitions. [2024-10-13 07:08:21,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 257 transitions, 2619 flow [2024-10-13 07:08:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:08:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:08:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2024-10-13 07:08:21,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2024-10-13 07:08:21,204 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 518 flow. Second operand 17 states and 232 transitions. [2024-10-13 07:08:21,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 257 transitions, 2619 flow [2024-10-13 07:08:21,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 257 transitions, 2513 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-10-13 07:08:21,219 INFO L231 Difference]: Finished difference. Result has 82 places, 147 transitions, 1757 flow [2024-10-13 07:08:21,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1757, PETRI_PLACES=82, PETRI_TRANSITIONS=147} [2024-10-13 07:08:21,220 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2024-10-13 07:08:21,220 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 147 transitions, 1757 flow [2024-10-13 07:08:21,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:21,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:21,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:21,247 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 07:08:21,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:21,421 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 07:08:21,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2018971582, now seen corresponding path program 3 times [2024-10-13 07:08:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:21,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36795944] [2024-10-13 07:08:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:21,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:21,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36795944] [2024-10-13 07:08:21,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36795944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:21,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555276687] [2024-10-13 07:08:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:21,610 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 07:08:21,618 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 07:08:21,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:08:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:21,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:08:21,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:21,802 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 07:08:21,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:21,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555276687] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:21,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:21,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-13 07:08:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833558664] [2024-10-13 07:08:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:21,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:08:21,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:08:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:08:21,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 147 transitions, 1757 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:21,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:21,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:22,581 INFO L124 PetriNetUnfolderBase]: 1487/2540 cut-off events. [2024-10-13 07:08:22,581 INFO L125 PetriNetUnfolderBase]: For 13112/13112 co-relation queries the response was YES. [2024-10-13 07:08:22,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 2540 events. 1487/2540 cut-off events. For 13112/13112 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14300 event pairs, 122 based on Foata normal form. 7/2546 useless extension candidates. Maximal degree in co-relation 12010. Up to 658 conditions per place. [2024-10-13 07:08:22,605 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 189 selfloop transitions, 164 changer transitions 12/368 dead transitions. [2024-10-13 07:08:22,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 368 transitions, 4819 flow [2024-10-13 07:08:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:08:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:08:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-10-13 07:08:22,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-10-13 07:08:22,607 INFO L175 Difference]: Start difference. First operand has 82 places, 147 transitions, 1757 flow. Second operand 11 states and 147 transitions. [2024-10-13 07:08:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 368 transitions, 4819 flow [2024-10-13 07:08:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 368 transitions, 4462 flow, removed 175 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:22,638 INFO L231 Difference]: Finished difference. Result has 95 places, 258 transitions, 3563 flow [2024-10-13 07:08:22,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3563, PETRI_PLACES=95, PETRI_TRANSITIONS=258} [2024-10-13 07:08:22,639 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2024-10-13 07:08:22,639 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 258 transitions, 3563 flow [2024-10-13 07:08:22,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:22,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:22,639 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:22,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:08:22,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:22,841 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 07:08:22,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -90873109, now seen corresponding path program 1 times [2024-10-13 07:08:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:22,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991565165] [2024-10-13 07:08:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:22,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991565165] [2024-10-13 07:08:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991565165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489002595] [2024-10-13 07:08:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:22,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:22,888 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 07:08:22,894 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 07:08:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:22,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:08:22,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:23,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489002595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:23,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:23,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-13 07:08:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673803421] [2024-10-13 07:08:23,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:23,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:08:23,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:08:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:08:23,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:23,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 258 transitions, 3563 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:23,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:23,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:23,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:23,659 INFO L124 PetriNetUnfolderBase]: 2297/4006 cut-off events. [2024-10-13 07:08:23,659 INFO L125 PetriNetUnfolderBase]: For 27522/27542 co-relation queries the response was YES. [2024-10-13 07:08:23,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23618 conditions, 4006 events. 2297/4006 cut-off events. For 27522/27542 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25703 event pairs, 37 based on Foata normal form. 57/4061 useless extension candidates. Maximal degree in co-relation 20786. Up to 1209 conditions per place. [2024-10-13 07:08:23,690 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 407 selfloop transitions, 149 changer transitions 2/561 dead transitions. [2024-10-13 07:08:23,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 561 transitions, 8255 flow [2024-10-13 07:08:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:08:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:08:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-10-13 07:08:23,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-13 07:08:23,692 INFO L175 Difference]: Start difference. First operand has 95 places, 258 transitions, 3563 flow. Second operand 12 states and 142 transitions. [2024-10-13 07:08:23,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 561 transitions, 8255 flow [2024-10-13 07:08:23,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 561 transitions, 8087 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-10-13 07:08:23,778 INFO L231 Difference]: Finished difference. Result has 107 places, 354 transitions, 5545 flow [2024-10-13 07:08:23,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5545, PETRI_PLACES=107, PETRI_TRANSITIONS=354} [2024-10-13 07:08:23,781 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2024-10-13 07:08:23,781 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 354 transitions, 5545 flow [2024-10-13 07:08:23,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:23,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:23,781 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:23,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:23,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:23,987 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 07:08:23,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash -217573595, now seen corresponding path program 2 times [2024-10-13 07:08:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:23,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991816218] [2024-10-13 07:08:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:23,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991816218] [2024-10-13 07:08:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991816218] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954050328] [2024-10-13 07:08:24,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:08:24,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:24,174 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 07:08:24,175 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 07:08:24,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:08:24,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:24,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:08:24,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:24,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954050328] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:24,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:24,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-10-13 07:08:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626040018] [2024-10-13 07:08:24,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:24,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 07:08:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 07:08:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:08:24,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 354 transitions, 5545 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:25,196 INFO L124 PetriNetUnfolderBase]: 2687/4849 cut-off events. [2024-10-13 07:08:25,196 INFO L125 PetriNetUnfolderBase]: For 42268/42268 co-relation queries the response was YES. [2024-10-13 07:08:25,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31857 conditions, 4849 events. 2687/4849 cut-off events. For 42268/42268 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33577 event pairs, 186 based on Foata normal form. 36/4884 useless extension candidates. Maximal degree in co-relation 31465. Up to 1629 conditions per place. [2024-10-13 07:08:25,242 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 345 selfloop transitions, 300 changer transitions 0/648 dead transitions. [2024-10-13 07:08:25,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 648 transitions, 10824 flow [2024-10-13 07:08:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:08:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:08:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-10-13 07:08:25,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-10-13 07:08:25,244 INFO L175 Difference]: Start difference. First operand has 107 places, 354 transitions, 5545 flow. Second operand 14 states and 162 transitions. [2024-10-13 07:08:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 648 transitions, 10824 flow [2024-10-13 07:08:25,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 648 transitions, 10391 flow, removed 209 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:25,377 INFO L231 Difference]: Finished difference. Result has 124 places, 474 transitions, 8098 flow [2024-10-13 07:08:25,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8098, PETRI_PLACES=124, PETRI_TRANSITIONS=474} [2024-10-13 07:08:25,378 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2024-10-13 07:08:25,378 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 474 transitions, 8098 flow [2024-10-13 07:08:25,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:25,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:25,378 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:25,391 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 07:08:25,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:25,579 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 07:08:25,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1366077662, now seen corresponding path program 3 times [2024-10-13 07:08:25,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:25,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077000453] [2024-10-13 07:08:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:25,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077000453] [2024-10-13 07:08:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077000453] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678280932] [2024-10-13 07:08:25,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:08:25,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:25,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:25,892 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 07:08:25,896 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 07:08:26,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:08:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:26,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:08:26,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:26,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678280932] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:26,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-13 07:08:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022633994] [2024-10-13 07:08:26,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:26,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:08:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:08:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:08:26,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:26,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 474 transitions, 8098 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:26,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:29,021 INFO L124 PetriNetUnfolderBase]: 4077/7426 cut-off events. [2024-10-13 07:08:29,021 INFO L125 PetriNetUnfolderBase]: For 80964/80964 co-relation queries the response was YES. [2024-10-13 07:08:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51983 conditions, 7426 events. 4077/7426 cut-off events. For 80964/80964 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 53763 event pairs, 322 based on Foata normal form. 37/7462 useless extension candidates. Maximal degree in co-relation 51256. Up to 4470 conditions per place. [2024-10-13 07:08:29,074 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 624 selfloop transitions, 283 changer transitions 25/935 dead transitions. [2024-10-13 07:08:29,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 935 transitions, 17152 flow [2024-10-13 07:08:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:08:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:08:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 245 transitions. [2024-10-13 07:08:29,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2024-10-13 07:08:29,076 INFO L175 Difference]: Start difference. First operand has 124 places, 474 transitions, 8098 flow. Second operand 19 states and 245 transitions. [2024-10-13 07:08:29,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 935 transitions, 17152 flow [2024-10-13 07:08:29,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 935 transitions, 16802 flow, removed 169 selfloop flow, removed 2 redundant places. [2024-10-13 07:08:29,395 INFO L231 Difference]: Finished difference. Result has 150 places, 689 transitions, 12899 flow [2024-10-13 07:08:29,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12899, PETRI_PLACES=150, PETRI_TRANSITIONS=689} [2024-10-13 07:08:29,396 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2024-10-13 07:08:29,397 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 689 transitions, 12899 flow [2024-10-13 07:08:29,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:29,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:29,397 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:29,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:29,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:29,602 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 07:08:29,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2081178062, now seen corresponding path program 4 times [2024-10-13 07:08:29,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:29,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146341924] [2024-10-13 07:08:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:29,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:29,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:29,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146341924] [2024-10-13 07:08:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146341924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:29,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000433278] [2024-10-13 07:08:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:08:29,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:29,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:29,972 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 07:08:29,973 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 07:08:30,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:08:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:30,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:08:30,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:34,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:08:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000433278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:34,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-13 07:08:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050846154] [2024-10-13 07:08:34,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:34,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:08:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:08:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-10-13 07:08:34,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:34,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 689 transitions, 12899 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:34,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:34,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:34,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:42,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:08:46,982 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 07:08:49,829 INFO L124 PetriNetUnfolderBase]: 5388/9853 cut-off events. [2024-10-13 07:08:49,829 INFO L125 PetriNetUnfolderBase]: For 135448/135448 co-relation queries the response was YES. [2024-10-13 07:08:49,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74224 conditions, 9853 events. 5388/9853 cut-off events. For 135448/135448 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 75687 event pairs, 458 based on Foata normal form. 18/9870 useless extension candidates. Maximal degree in co-relation 73245. Up to 7061 conditions per place. [2024-10-13 07:08:49,938 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 800 selfloop transitions, 337 changer transitions 19/1159 dead transitions. [2024-10-13 07:08:49,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1159 transitions, 23215 flow [2024-10-13 07:08:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:08:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:08:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 303 transitions. [2024-10-13 07:08:49,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6886363636363636 [2024-10-13 07:08:49,940 INFO L175 Difference]: Start difference. First operand has 150 places, 689 transitions, 12899 flow. Second operand 22 states and 303 transitions. [2024-10-13 07:08:49,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1159 transitions, 23215 flow [2024-10-13 07:08:50,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1159 transitions, 22337 flow, removed 413 selfloop flow, removed 7 redundant places. [2024-10-13 07:08:50,810 INFO L231 Difference]: Finished difference. Result has 175 places, 949 transitions, 19134 flow [2024-10-13 07:08:50,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12345, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19134, PETRI_PLACES=175, PETRI_TRANSITIONS=949} [2024-10-13 07:08:50,812 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2024-10-13 07:08:50,812 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 949 transitions, 19134 flow [2024-10-13 07:08:50,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:50,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:50,812 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:50,826 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 07:08:51,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 07:08:51,017 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 07:08:51,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -140309619, now seen corresponding path program 5 times [2024-10-13 07:08:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482943482] [2024-10-13 07:08:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:51,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482943482] [2024-10-13 07:08:51,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482943482] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:51,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012962027] [2024-10-13 07:08:51,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:08:51,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:51,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:51,155 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 07:08:51,161 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 07:08:51,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:08:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:51,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:08:51,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:51,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:51,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012962027] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:51,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:51,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-13 07:08:51,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539225266] [2024-10-13 07:08:51,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:51,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:08:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:08:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:08:51,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:51,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 949 transitions, 19134 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:51,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:51,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:51,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:08:54,415 INFO L124 PetriNetUnfolderBase]: 6587/11877 cut-off events. [2024-10-13 07:08:54,415 INFO L125 PetriNetUnfolderBase]: For 184356/184356 co-relation queries the response was YES. [2024-10-13 07:08:54,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93586 conditions, 11877 events. 6587/11877 cut-off events. For 184356/184356 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 93463 event pairs, 448 based on Foata normal form. 142/12018 useless extension candidates. Maximal degree in co-relation 90631. Up to 5087 conditions per place. [2024-10-13 07:08:54,531 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 859 selfloop transitions, 680 changer transitions 0/1542 dead transitions. [2024-10-13 07:08:54,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1542 transitions, 32730 flow [2024-10-13 07:08:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:08:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:08:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-10-13 07:08:54,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-10-13 07:08:54,533 INFO L175 Difference]: Start difference. First operand has 175 places, 949 transitions, 19134 flow. Second operand 14 states and 163 transitions. [2024-10-13 07:08:54,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1542 transitions, 32730 flow [2024-10-13 07:08:56,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 1542 transitions, 31445 flow, removed 611 selfloop flow, removed 9 redundant places. [2024-10-13 07:08:56,188 INFO L231 Difference]: Finished difference. Result has 187 places, 1199 transitions, 26005 flow [2024-10-13 07:08:56,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18212, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26005, PETRI_PLACES=187, PETRI_TRANSITIONS=1199} [2024-10-13 07:08:56,189 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2024-10-13 07:08:56,189 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 1199 transitions, 26005 flow [2024-10-13 07:08:56,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:56,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:08:56,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:08:56,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 07:08:56,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 07:08:56,391 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 07:08:56,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:08:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash 291719988, now seen corresponding path program 6 times [2024-10-13 07:08:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:08:56,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600841797] [2024-10-13 07:08:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:08:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:08:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:08:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:56,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:08:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600841797] [2024-10-13 07:08:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600841797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:08:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048263557] [2024-10-13 07:08:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:08:56,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:08:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:08:56,718 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 07:08:56,722 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 07:08:56,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:08:56,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:08:56,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:08:56,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:08:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:08:57,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:08:57,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048263557] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:57,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-13 07:08:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209185568] [2024-10-13 07:08:57,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:57,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:08:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:08:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:08:57,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:08:57,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 1199 transitions, 26005 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:08:57,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:57,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:08:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:03,110 INFO L124 PetriNetUnfolderBase]: 7514/13507 cut-off events. [2024-10-13 07:09:03,111 INFO L125 PetriNetUnfolderBase]: For 287699/287699 co-relation queries the response was YES. [2024-10-13 07:09:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118289 conditions, 13507 events. 7514/13507 cut-off events. For 287699/287699 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 108243 event pairs, 524 based on Foata normal form. 22/13528 useless extension candidates. Maximal degree in co-relation 114749. Up to 6484 conditions per place. [2024-10-13 07:09:03,271 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 588 selfloop transitions, 1047 changer transitions 15/1653 dead transitions. [2024-10-13 07:09:03,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1653 transitions, 38941 flow [2024-10-13 07:09:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:09:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:09:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 285 transitions. [2024-10-13 07:09:03,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-13 07:09:03,274 INFO L175 Difference]: Start difference. First operand has 187 places, 1199 transitions, 26005 flow. Second operand 24 states and 285 transitions. [2024-10-13 07:09:03,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1653 transitions, 38941 flow [2024-10-13 07:09:05,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1653 transitions, 38343 flow, removed 281 selfloop flow, removed 3 redundant places. [2024-10-13 07:09:05,931 INFO L231 Difference]: Finished difference. Result has 216 places, 1521 transitions, 38045 flow [2024-10-13 07:09:05,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=24283, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38045, PETRI_PLACES=216, PETRI_TRANSITIONS=1521} [2024-10-13 07:09:05,933 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-10-13 07:09:05,933 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 1521 transitions, 38045 flow [2024-10-13 07:09:05,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:05,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:05,933 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:05,946 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 07:09:06,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:09:06,134 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 07:09:06,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 759064235, now seen corresponding path program 7 times [2024-10-13 07:09:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:06,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879727034] [2024-10-13 07:09:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879727034] [2024-10-13 07:09:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879727034] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697609521] [2024-10-13 07:09:06,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:09:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:06,188 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 07:09:06,189 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 07:09:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:06,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:09:06,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:06,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:06,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697609521] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:06,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-10-13 07:09:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419282357] [2024-10-13 07:09:06,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:06,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 07:09:06,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 07:09:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:09:06,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:09:06,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1521 transitions, 38045 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:06,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:06,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:09:06,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:12,325 INFO L124 PetriNetUnfolderBase]: 8088/14509 cut-off events. [2024-10-13 07:09:12,325 INFO L125 PetriNetUnfolderBase]: For 354233/354245 co-relation queries the response was YES. [2024-10-13 07:09:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136293 conditions, 14509 events. 8088/14509 cut-off events. For 354233/354245 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 117792 event pairs, 57 based on Foata normal form. 71/14578 useless extension candidates. Maximal degree in co-relation 132248. Up to 4450 conditions per place. [2024-10-13 07:09:12,486 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1435 selfloop transitions, 645 changer transitions 0/2083 dead transitions. [2024-10-13 07:09:12,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 2083 transitions, 51967 flow [2024-10-13 07:09:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 07:09:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-13 07:09:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-10-13 07:09:12,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-10-13 07:09:12,488 INFO L175 Difference]: Start difference. First operand has 216 places, 1521 transitions, 38045 flow. Second operand 15 states and 167 transitions. [2024-10-13 07:09:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 2083 transitions, 51967 flow [2024-10-13 07:09:15,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 2083 transitions, 49612 flow, removed 1163 selfloop flow, removed 7 redundant places. [2024-10-13 07:09:15,911 INFO L231 Difference]: Finished difference. Result has 227 places, 1634 transitions, 41122 flow [2024-10-13 07:09:15,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=35847, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41122, PETRI_PLACES=227, PETRI_TRANSITIONS=1634} [2024-10-13 07:09:15,912 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2024-10-13 07:09:15,913 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 1634 transitions, 41122 flow [2024-10-13 07:09:15,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:15,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:15,913 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:15,929 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 07:09:16,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 07:09:16,114 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 07:09:16,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-10-13 07:09:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:16,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876808841] [2024-10-13 07:09:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:16,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876808841] [2024-10-13 07:09:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876808841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512580397] [2024-10-13 07:09:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:09:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:16,331 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 07:09:16,332 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 07:09:16,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:09:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:16,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 07:09:16,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:16,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512580397] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:17,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:17,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-10-13 07:09:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167397341] [2024-10-13 07:09:17,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:17,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:17,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:09:17,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 1634 transitions, 41122 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:17,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:17,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:09:17,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:27,590 INFO L124 PetriNetUnfolderBase]: 9938/17764 cut-off events. [2024-10-13 07:09:27,590 INFO L125 PetriNetUnfolderBase]: For 479074/479074 co-relation queries the response was YES. [2024-10-13 07:09:27,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173574 conditions, 17764 events. 9938/17764 cut-off events. For 479074/479074 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 148763 event pairs, 641 based on Foata normal form. 41/17804 useless extension candidates. Maximal degree in co-relation 168561. Up to 7874 conditions per place. [2024-10-13 07:09:27,836 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 738 selfloop transitions, 1597 changer transitions 29/2367 dead transitions. [2024-10-13 07:09:27,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 2367 transitions, 64010 flow [2024-10-13 07:09:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:09:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:09:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 304 transitions. [2024-10-13 07:09:27,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-10-13 07:09:27,838 INFO L175 Difference]: Start difference. First operand has 227 places, 1634 transitions, 41122 flow. Second operand 26 states and 304 transitions. [2024-10-13 07:09:27,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 2367 transitions, 64010 flow [2024-10-13 07:09:33,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 2367 transitions, 62859 flow, removed 165 selfloop flow, removed 4 redundant places. [2024-10-13 07:09:33,310 INFO L231 Difference]: Finished difference. Result has 261 places, 2182 transitions, 62180 flow [2024-10-13 07:09:33,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=62180, PETRI_PLACES=261, PETRI_TRANSITIONS=2182} [2024-10-13 07:09:33,316 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2024-10-13 07:09:33,317 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 2182 transitions, 62180 flow [2024-10-13 07:09:33,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:33,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:33,317 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:33,330 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 07:09:33,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:09:33,518 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 07:09:33,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash -224702, now seen corresponding path program 9 times [2024-10-13 07:09:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:33,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234572027] [2024-10-13 07:09:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234572027] [2024-10-13 07:09:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234572027] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067351765] [2024-10-13 07:09:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:09:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:33,851 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 07:09:33,852 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 07:09:33,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:09:33,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:33,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:09:33,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:34,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067351765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:34,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-10-13 07:09:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166949689] [2024-10-13 07:09:34,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:34,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:09:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:09:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:09:34,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-13 07:09:34,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 2182 transitions, 62180 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:34,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:34,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-13 07:09:34,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:48,665 INFO L124 PetriNetUnfolderBase]: 12068/21497 cut-off events. [2024-10-13 07:09:48,666 INFO L125 PetriNetUnfolderBase]: For 656612/656624 co-relation queries the response was YES. [2024-10-13 07:09:48,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226004 conditions, 21497 events. 12068/21497 cut-off events. For 656612/656624 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 185455 event pairs, 896 based on Foata normal form. 32/21527 useless extension candidates. Maximal degree in co-relation 219684. Up to 10375 conditions per place. [2024-10-13 07:09:48,974 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 899 selfloop transitions, 2088 changer transitions 42/3032 dead transitions. [2024-10-13 07:09:48,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 3032 transitions, 92679 flow [2024-10-13 07:09:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-13 07:09:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-13 07:09:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 338 transitions. [2024-10-13 07:09:48,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-10-13 07:09:48,976 INFO L175 Difference]: Start difference. First operand has 261 places, 2182 transitions, 62180 flow. Second operand 30 states and 338 transitions. [2024-10-13 07:09:48,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 3032 transitions, 92679 flow