./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:21:05,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:21:05,770 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:21:05,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:21:05,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:21:05,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:21:05,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:21:05,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:21:05,810 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:21:05,811 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:21:05,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:21:05,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:21:05,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:21:05,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:21:05,814 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:21:05,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:21:05,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:21:05,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:21:05,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:21:05,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:21:05,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:21:05,820 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:21:05,821 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:21:05,822 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:21:05,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:21:05,822 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:21:05,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:21:05,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:21:05,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:21:05,823 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:21:05,823 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:21:05,823 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:21:05,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:21:05,824 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:21:05,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:21:05,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:21:05,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:21:05,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-12 08:21:06,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:21:06,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:21:06,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:21:06,117 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:21:06,118 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:21:06,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2024-11-12 08:21:07,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:21:07,764 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:21:07,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-12 08:21:07,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c404cabe/eb07765c4f414bb4b3b93bd3698a8348/FLAG400d12ef7 [2024-11-12 08:21:07,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c404cabe/eb07765c4f414bb4b3b93bd3698a8348 [2024-11-12 08:21:07,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:21:07,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:21:07,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:21:07,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:21:07,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:21:07,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:21:07" (1/1) ... [2024-11-12 08:21:07,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3377595f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:07, skipping insertion in model container [2024-11-12 08:21:07,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:21:07" (1/1) ... [2024-11-12 08:21:07,821 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:21:08,032 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-12 08:21:08,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:21:08,042 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:21:08,057 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-12 08:21:08,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:21:08,073 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:21:08,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08 WrapperNode [2024-11-12 08:21:08,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:21:08,075 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:21:08,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:21:08,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:21:08,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,108 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-12 08:21:08,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:21:08,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:21:08,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:21:08,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:21:08,121 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,135 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-12 08:21:08,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:21:08,152 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:21:08,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:21:08,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:21:08,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (1/1) ... [2024-11-12 08:21:08,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:21:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:08,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:21:08,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 08:21:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:21:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:21:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:21:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:21:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:21:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:21:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:21:08,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:21:08,260 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:21:08,386 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:21:08,389 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:21:08,595 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:21:08,597 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:21:08,835 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:21:08,835 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 08:21:08,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:21:08 BoogieIcfgContainer [2024-11-12 08:21:08,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:21:08,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:21:08,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:21:08,846 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:21:08,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:21:07" (1/3) ... [2024-11-12 08:21:08,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986d516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:21:08, skipping insertion in model container [2024-11-12 08:21:08,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:21:08" (2/3) ... [2024-11-12 08:21:08,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986d516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:21:08, skipping insertion in model container [2024-11-12 08:21:08,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:21:08" (3/3) ... [2024-11-12 08:21:08,848 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-12 08:21:08,868 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:21:08,868 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:21:08,868 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:21:08,904 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:21:08,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-12 08:21:08,976 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-12 08:21:08,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:21:08,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-11-12 08:21:08,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-12 08:21:08,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-12 08:21:08,994 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:21:09,002 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;@7d9c65e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:21:09,002 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:21:09,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:21:09,011 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-12 08:21:09,011 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:21:09,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:09,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:09,013 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:09,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-11-12 08:21:09,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:09,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7730043] [2024-11-12 08:21:09,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:09,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:09,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7730043] [2024-11-12 08:21:09,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7730043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:09,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:09,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:21:09,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087358526] [2024-11-12 08:21:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:09,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:21:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:21:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:21:09,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:09,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:09,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:09,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:09,663 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-11-12 08:21:09,663 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 08:21:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-11-12 08:21:09,668 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-12 08:21:09,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-11-12 08:21:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:21:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:21:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-12 08:21:09,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-12 08:21:09,698 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-11-12 08:21:09,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-11-12 08:21:09,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:21:09,708 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-12 08:21:09,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-12 08:21:09,716 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-12 08:21:09,718 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-12 08:21:09,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:09,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:09,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:09,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:21:09,721 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:09,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-11-12 08:21:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826219595] [2024-11-12 08:21:09,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826219595] [2024-11-12 08:21:09,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826219595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:09,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:09,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:21:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169678762] [2024-11-12 08:21:09,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:09,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:21:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:21:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:21:09,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:09,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:09,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:09,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:09,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:10,025 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-11-12 08:21:10,026 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-11-12 08:21:10,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-11-12 08:21:10,030 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-11-12 08:21:10,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-11-12 08:21:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:21:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:21:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-12 08:21:10,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-12 08:21:10,035 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-11-12 08:21:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-11-12 08:21:10,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:21:10,038 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-11-12 08:21:10,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-12 08:21:10,039 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-12 08:21:10,040 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-11-12 08:21:10,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:10,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:10,041 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:10,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:21:10,041 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:10,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-11-12 08:21:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920994078] [2024-11-12 08:21:10,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:10,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:10,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920994078] [2024-11-12 08:21:10,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920994078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:10,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433262604] [2024-11-12 08:21:10,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:21:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:10,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:21:10,211 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:10,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:10,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:21:10,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:10,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:10,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433262604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:10,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-12 08:21:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13475924] [2024-11-12 08:21:10,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:10,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:21:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:21:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:21:10,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:10,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:10,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:10,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:10,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:10,525 INFO L124 PetriNetUnfolderBase]: 145/239 cut-off events. [2024-11-12 08:21:10,526 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-12 08:21:10,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 239 events. 145/239 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 777 event pairs, 15 based on Foata normal form. 8/244 useless extension candidates. Maximal degree in co-relation 306. Up to 105 conditions per place. [2024-11-12 08:21:10,532 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 35 selfloop transitions, 15 changer transitions 5/58 dead transitions. [2024-11-12 08:21:10,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 348 flow [2024-11-12 08:21:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:21:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:21:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-11-12 08:21:10,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-12 08:21:10,534 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 7 states and 80 transitions. [2024-11-12 08:21:10,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 348 flow [2024-11-12 08:21:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 58 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:21:10,540 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 211 flow [2024-11-12 08:21:10,541 INFO L262 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=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2024-11-12 08:21:10,541 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2024-11-12 08:21:10,542 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 211 flow [2024-11-12 08:21:10,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:10,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:10,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:10,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:21:10,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,751 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:10,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-11-12 08:21:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:10,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170978924] [2024-11-12 08:21:10,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170978924] [2024-11-12 08:21:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170978924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062985609] [2024-11-12 08:21:10,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:10,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:10,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:21:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:10,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 08:21:10,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:11,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062985609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:11,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-12 08:21:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510155221] [2024-11-12 08:21:11,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:11,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:21:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:21:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:21:11,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:11,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:11,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:11,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:11,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:11,140 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-11-12 08:21:11,140 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-11-12 08:21:11,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 223 events. 127/223 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 2 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 543. Up to 91 conditions per place. [2024-11-12 08:21:11,144 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-11-12 08:21:11,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 423 flow [2024-11-12 08:21:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:21:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:21:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-12 08:21:11,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-12 08:21:11,145 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 211 flow. Second operand 5 states and 64 transitions. [2024-11-12 08:21:11,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 423 flow [2024-11-12 08:21:11,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 411 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-12 08:21:11,151 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 237 flow [2024-11-12 08:21:11,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-11-12 08:21:11,152 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-12 08:21:11,152 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 237 flow [2024-11-12 08:21:11,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:11,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:11,153 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:11,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:11,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-12 08:21:11,357 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:11,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1647003766, now seen corresponding path program 1 times [2024-11-12 08:21:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:11,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605048520] [2024-11-12 08:21:11,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605048520] [2024-11-12 08:21:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605048520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755606693] [2024-11-12 08:21:11,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:11,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:11,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:11,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:21:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:11,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:21:11,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:11,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:12,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755606693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:12,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 08:21:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064869173] [2024-11-12 08:21:12,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:12,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 08:21:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 08:21:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-12 08:21:12,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:12,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 237 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:12,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:12,418 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-12 08:21:12,419 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-11-12 08:21:12,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 435 events. 249/435 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1674 event pairs, 10 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1015. Up to 176 conditions per place. [2024-11-12 08:21:12,425 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2024-11-12 08:21:12,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 105 transitions, 873 flow [2024-11-12 08:21:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:21:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:21:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-11-12 08:21:12,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-12 08:21:12,429 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 237 flow. Second operand 9 states and 119 transitions. [2024-11-12 08:21:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 105 transitions, 873 flow [2024-11-12 08:21:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 841 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-12 08:21:12,437 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 409 flow [2024-11-12 08:21:12,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-12 08:21:12,440 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-12 08:21:12,440 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 409 flow [2024-11-12 08:21:12,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:12,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:12,441 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:12,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:12,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:12,642 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:12,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-11-12 08:21:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544688220] [2024-11-12 08:21:12,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544688220] [2024-11-12 08:21:12,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544688220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:21:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905132323] [2024-11-12 08:21:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:12,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:21:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:21:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:21:12,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:12,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:12,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:12,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:12,794 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2024-11-12 08:21:12,795 INFO L125 PetriNetUnfolderBase]: For 1044/1050 co-relation queries the response was YES. [2024-11-12 08:21:12,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 331 events. 192/331 cut-off events. For 1044/1050 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1130 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1490. Up to 152 conditions per place. [2024-11-12 08:21:12,799 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2024-11-12 08:21:12,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 696 flow [2024-11-12 08:21:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:21:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:21:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-12 08:21:12,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-12 08:21:12,802 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 409 flow. Second operand 5 states and 59 transitions. [2024-11-12 08:21:12,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 696 flow [2024-11-12 08:21:12,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 639 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-12 08:21:12,809 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 453 flow [2024-11-12 08:21:12,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-12 08:21:12,813 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-12 08:21:12,814 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 453 flow [2024-11-12 08:21:12,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:12,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:12,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:12,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 08:21:12,815 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:12,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-11-12 08:21:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698241789] [2024-11-12 08:21:12,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:13,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:13,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698241789] [2024-11-12 08:21:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698241789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148209781] [2024-11-12 08:21:13,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:21:13,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:13,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:13,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:21:13,156 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:13,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:13,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:21:13,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:13,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148209781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:13,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:13,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 08:21:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677600841] [2024-11-12 08:21:13,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:13,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 08:21:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 08:21:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-12 08:21:13,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:13,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 453 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:13,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:13,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:13,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:14,192 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2024-11-12 08:21:14,193 INFO L125 PetriNetUnfolderBase]: For 4390/4390 co-relation queries the response was YES. [2024-11-12 08:21:14,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 1068 events. 624/1068 cut-off events. For 4390/4390 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5025 event pairs, 56 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4328. Up to 321 conditions per place. [2024-11-12 08:21:14,204 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2024-11-12 08:21:14,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2363 flow [2024-11-12 08:21:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:21:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:21:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-11-12 08:21:14,208 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2024-11-12 08:21:14,208 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 453 flow. Second operand 17 states and 223 transitions. [2024-11-12 08:21:14,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2363 flow [2024-11-12 08:21:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2260 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-12 08:21:14,224 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1585 flow [2024-11-12 08:21:14,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2024-11-12 08:21:14,225 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-11-12 08:21:14,225 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1585 flow [2024-11-12 08:21:14,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:14,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:14,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:14,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:21:14,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:14,429 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:14,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1101021392, now seen corresponding path program 3 times [2024-11-12 08:21:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969225357] [2024-11-12 08:21:14,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:14,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969225357] [2024-11-12 08:21:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969225357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722532223] [2024-11-12 08:21:14,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:21:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:14,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:21:14,708 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:21:14,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:14,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:21:14,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:14,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:15,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722532223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:15,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:15,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 08:21:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350964792] [2024-11-12 08:21:15,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:15,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 08:21:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 08:21:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-12 08:21:15,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:15,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1585 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:15,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:15,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:15,706 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2024-11-12 08:21:15,707 INFO L125 PetriNetUnfolderBase]: For 11544/11544 co-relation queries the response was YES. [2024-11-12 08:21:15,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12458 conditions, 2300 events. 1342/2300 cut-off events. For 11544/11544 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12722 event pairs, 116 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11372. Up to 713 conditions per place. [2024-11-12 08:21:15,733 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2024-11-12 08:21:15,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4525 flow [2024-11-12 08:21:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:21:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:21:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-11-12 08:21:15,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-11-12 08:21:15,735 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1585 flow. Second operand 11 states and 144 transitions. [2024-11-12 08:21:15,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4525 flow [2024-11-12 08:21:15,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4231 flow, removed 144 selfloop flow, removed 2 redundant places. [2024-11-12 08:21:15,783 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3341 flow [2024-11-12 08:21:15,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3341, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2024-11-12 08:21:15,784 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-12 08:21:15,785 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3341 flow [2024-11-12 08:21:15,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:15,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:15,785 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:15,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:21:15,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:15,987 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:15,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2048609430, now seen corresponding path program 1 times [2024-11-12 08:21:15,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:15,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973150892] [2024-11-12 08:21:15,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973150892] [2024-11-12 08:21:16,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973150892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720195899] [2024-11-12 08:21:16,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:16,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:16,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:16,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:21:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:16,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 08:21:16,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:16,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720195899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:17,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-12 08:21:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996660690] [2024-11-12 08:21:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:17,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:17,267 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:17,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3341 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:17,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:17,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:17,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:18,819 INFO L124 PetriNetUnfolderBase]: 2097/3586 cut-off events. [2024-11-12 08:21:18,820 INFO L125 PetriNetUnfolderBase]: For 24256/24256 co-relation queries the response was YES. [2024-11-12 08:21:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21352 conditions, 3586 events. 2097/3586 cut-off events. For 24256/24256 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20365 event pairs, 169 based on Foata normal form. 16/3601 useless extension candidates. Maximal degree in co-relation 20076. Up to 2101 conditions per place. [2024-11-12 08:21:18,908 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 312 selfloop transitions, 162 changer transitions 6/483 dead transitions. [2024-11-12 08:21:18,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 483 transitions, 7144 flow [2024-11-12 08:21:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 08:21:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-12 08:21:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 205 transitions. [2024-11-12 08:21:18,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-12 08:21:18,910 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3341 flow. Second operand 16 states and 205 transitions. [2024-11-12 08:21:18,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 483 transitions, 7144 flow [2024-11-12 08:21:18,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 483 transitions, 7001 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:18,987 INFO L231 Difference]: Finished difference. Result has 111 places, 363 transitions, 5750 flow [2024-11-12 08:21:18,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5750, PETRI_PLACES=111, PETRI_TRANSITIONS=363} [2024-11-12 08:21:18,990 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2024-11-12 08:21:18,990 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 363 transitions, 5750 flow [2024-11-12 08:21:18,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:18,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:18,991 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:19,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:21:19,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:19,196 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:19,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash 4438554, now seen corresponding path program 2 times [2024-11-12 08:21:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:19,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394492017] [2024-11-12 08:21:19,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394492017] [2024-11-12 08:21:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394492017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408804460] [2024-11-12 08:21:19,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:21:19,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:19,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:19,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:21:19,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:19,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:19,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 08:21:19,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:22,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408804460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:22,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-12 08:21:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316526857] [2024-11-12 08:21:22,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:22,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:22,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:22,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 363 transitions, 5750 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:22,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:22,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:22,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:27,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-12 08:21:29,321 INFO L124 PetriNetUnfolderBase]: 2907/5003 cut-off events. [2024-11-12 08:21:29,321 INFO L125 PetriNetUnfolderBase]: For 45595/45595 co-relation queries the response was YES. [2024-11-12 08:21:29,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32501 conditions, 5003 events. 2907/5003 cut-off events. For 45595/45595 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31062 event pairs, 285 based on Foata normal form. 6/5008 useless extension candidates. Maximal degree in co-relation 30828. Up to 3552 conditions per place. [2024-11-12 08:21:29,394 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 464 selfloop transitions, 187 changer transitions 8/662 dead transitions. [2024-11-12 08:21:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 662 transitions, 11013 flow [2024-11-12 08:21:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 08:21:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-12 08:21:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 284 transitions. [2024-11-12 08:21:29,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-12 08:21:29,396 INFO L175 Difference]: Start difference. First operand has 111 places, 363 transitions, 5750 flow. Second operand 21 states and 284 transitions. [2024-11-12 08:21:29,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 662 transitions, 11013 flow [2024-11-12 08:21:29,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 662 transitions, 10444 flow, removed 273 selfloop flow, removed 4 redundant places. [2024-11-12 08:21:29,569 INFO L231 Difference]: Finished difference. Result has 139 places, 522 transitions, 8937 flow [2024-11-12 08:21:29,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8937, PETRI_PLACES=139, PETRI_TRANSITIONS=522} [2024-11-12 08:21:29,570 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2024-11-12 08:21:29,570 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 522 transitions, 8937 flow [2024-11-12 08:21:29,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:29,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:29,570 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:29,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 08:21:29,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:29,775 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:29,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1151189367, now seen corresponding path program 3 times [2024-11-12 08:21:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877098853] [2024-11-12 08:21:29,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:29,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877098853] [2024-11-12 08:21:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877098853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472646536] [2024-11-12 08:21:29,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:21:29,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:29,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:29,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:21:29,946 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:21:29,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:29,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:21:29,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:30,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:30,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472646536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:30,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:30,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-12 08:21:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376701605] [2024-11-12 08:21:30,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:30,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 08:21:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 08:21:30,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-12 08:21:30,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:30,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 522 transitions, 8937 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:30,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:30,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:30,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:31,767 INFO L124 PetriNetUnfolderBase]: 3972/7031 cut-off events. [2024-11-12 08:21:31,768 INFO L125 PetriNetUnfolderBase]: For 82888/82891 co-relation queries the response was YES. [2024-11-12 08:21:31,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47051 conditions, 7031 events. 3972/7031 cut-off events. For 82888/82891 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 49179 event pairs, 58 based on Foata normal form. 63/7092 useless extension candidates. Maximal degree in co-relation 45094. Up to 2131 conditions per place. [2024-11-12 08:21:31,843 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 694 selfloop transitions, 251 changer transitions 13/961 dead transitions. [2024-11-12 08:21:31,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 961 transitions, 17212 flow [2024-11-12 08:21:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 08:21:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 08:21:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-11-12 08:21:31,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-12 08:21:31,845 INFO L175 Difference]: Start difference. First operand has 139 places, 522 transitions, 8937 flow. Second operand 12 states and 141 transitions. [2024-11-12 08:21:31,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 961 transitions, 17212 flow [2024-11-12 08:21:32,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 961 transitions, 16413 flow, removed 382 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:32,268 INFO L231 Difference]: Finished difference. Result has 151 places, 655 transitions, 11765 flow [2024-11-12 08:21:32,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8329, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11765, PETRI_PLACES=151, PETRI_TRANSITIONS=655} [2024-11-12 08:21:32,270 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2024-11-12 08:21:32,270 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 655 transitions, 11765 flow [2024-11-12 08:21:32,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:32,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:32,270 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:32,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 08:21:32,474 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,SelfDestructingSolverStorable10 [2024-11-12 08:21:32,477 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:32,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash -356101745, now seen corresponding path program 4 times [2024-11-12 08:21:32,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:32,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746996281] [2024-11-12 08:21:32,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:32,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746996281] [2024-11-12 08:21:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746996281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210249849] [2024-11-12 08:21:32,614 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:21:32,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:32,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:32,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 08:21:32,676 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:21:32,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:32,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:21:32,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:32,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210249849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:32,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-12 08:21:32,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542534062] [2024-11-12 08:21:32,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:32,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:21:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:21:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:21:32,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:32,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 655 transitions, 11765 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:32,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:32,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:32,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:34,930 INFO L124 PetriNetUnfolderBase]: 4456/8220 cut-off events. [2024-11-12 08:21:34,931 INFO L125 PetriNetUnfolderBase]: For 113525/113525 co-relation queries the response was YES. [2024-11-12 08:21:34,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59684 conditions, 8220 events. 4456/8220 cut-off events. For 113525/113525 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 61938 event pairs, 372 based on Foata normal form. 32/8251 useless extension candidates. Maximal degree in co-relation 59109. Up to 3296 conditions per place. [2024-11-12 08:21:35,031 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 555 selfloop transitions, 486 changer transitions 5/1049 dead transitions. [2024-11-12 08:21:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1049 transitions, 20318 flow [2024-11-12 08:21:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 08:21:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 08:21:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-11-12 08:21:35,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-11-12 08:21:35,034 INFO L175 Difference]: Start difference. First operand has 151 places, 655 transitions, 11765 flow. Second operand 14 states and 159 transitions. [2024-11-12 08:21:35,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1049 transitions, 20318 flow [2024-11-12 08:21:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 1049 transitions, 19675 flow, removed 317 selfloop flow, removed 2 redundant places. [2024-11-12 08:21:35,793 INFO L231 Difference]: Finished difference. Result has 166 places, 798 transitions, 15482 flow [2024-11-12 08:21:35,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11198, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15482, PETRI_PLACES=166, PETRI_TRANSITIONS=798} [2024-11-12 08:21:35,794 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2024-11-12 08:21:35,794 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 798 transitions, 15482 flow [2024-11-12 08:21:35,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:35,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:35,794 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:35,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 08:21:35,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:35,995 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:35,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -853422420, now seen corresponding path program 5 times [2024-11-12 08:21:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:35,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204007673] [2024-11-12 08:21:35,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204007673] [2024-11-12 08:21:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204007673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987537562] [2024-11-12 08:21:36,347 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:21:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:36,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:36,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 08:21:36,416 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:36,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:36,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 08:21:36,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:36,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987537562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:37,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:37,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-12 08:21:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829442517] [2024-11-12 08:21:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:37,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:37,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:37,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 798 transitions, 15482 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:37,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:37,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:37,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:40,418 INFO L124 PetriNetUnfolderBase]: 5151/9481 cut-off events. [2024-11-12 08:21:40,419 INFO L125 PetriNetUnfolderBase]: For 153009/153009 co-relation queries the response was YES. [2024-11-12 08:21:40,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73254 conditions, 9481 events. 5151/9481 cut-off events. For 153009/153009 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 73225 event pairs, 431 based on Foata normal form. 10/9490 useless extension candidates. Maximal degree in co-relation 70402. Up to 4792 conditions per place. [2024-11-12 08:21:40,510 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 439 selfloop transitions, 660 changer transitions 12/1114 dead transitions. [2024-11-12 08:21:40,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1114 transitions, 23431 flow [2024-11-12 08:21:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:21:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:21:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 237 transitions. [2024-11-12 08:21:40,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-11-12 08:21:40,512 INFO L175 Difference]: Start difference. First operand has 166 places, 798 transitions, 15482 flow. Second operand 20 states and 237 transitions. [2024-11-12 08:21:40,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1114 transitions, 23431 flow [2024-11-12 08:21:41,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1114 transitions, 23115 flow, removed 146 selfloop flow, removed 3 redundant places. [2024-11-12 08:21:41,655 INFO L231 Difference]: Finished difference. Result has 191 places, 1018 transitions, 22858 flow [2024-11-12 08:21:41,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=15254, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22858, PETRI_PLACES=191, PETRI_TRANSITIONS=1018} [2024-11-12 08:21:41,657 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2024-11-12 08:21:41,657 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 1018 transitions, 22858 flow [2024-11-12 08:21:41,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:41,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:41,657 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:41,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:41,858 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,SelfDestructingSolverStorable12 [2024-11-12 08:21:41,858 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:41,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:41,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2098924377, now seen corresponding path program 6 times [2024-11-12 08:21:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908928434] [2024-11-12 08:21:41,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908928434] [2024-11-12 08:21:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908928434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763177887] [2024-11-12 08:21:41,914 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:21:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:41,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:41,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:41,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 08:21:41,968 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:21:41,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:41,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:21:41,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:42,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:21:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763177887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:42,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-12 08:21:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925999146] [2024-11-12 08:21:42,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:42,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 08:21:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 08:21:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-12 08:21:42,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:42,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 1018 transitions, 22858 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:42,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:42,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:42,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:45,598 INFO L124 PetriNetUnfolderBase]: 6035/10976 cut-off events. [2024-11-12 08:21:45,599 INFO L125 PetriNetUnfolderBase]: For 204926/204926 co-relation queries the response was YES. [2024-11-12 08:21:45,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92232 conditions, 10976 events. 6035/10976 cut-off events. For 204926/204926 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 86159 event pairs, 450 based on Foata normal form. 146/11121 useless extension candidates. Maximal degree in co-relation 88723. Up to 4519 conditions per place. [2024-11-12 08:21:45,702 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 788 selfloop transitions, 713 changer transitions 0/1504 dead transitions. [2024-11-12 08:21:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1504 transitions, 34921 flow [2024-11-12 08:21:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 08:21:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 08:21:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-11-12 08:21:45,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-12 08:21:45,704 INFO L175 Difference]: Start difference. First operand has 191 places, 1018 transitions, 22858 flow. Second operand 14 states and 163 transitions. [2024-11-12 08:21:45,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1504 transitions, 34921 flow [2024-11-12 08:21:47,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1504 transitions, 33807 flow, removed 548 selfloop flow, removed 5 redundant places. [2024-11-12 08:21:47,558 INFO L231 Difference]: Finished difference. Result has 207 places, 1211 transitions, 29371 flow [2024-11-12 08:21:47,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21868, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=29371, PETRI_PLACES=207, PETRI_TRANSITIONS=1211} [2024-11-12 08:21:47,559 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2024-11-12 08:21:47,559 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1211 transitions, 29371 flow [2024-11-12 08:21:47,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:47,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:47,560 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:47,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 08:21:47,760 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,SelfDestructingSolverStorable13 [2024-11-12 08:21:47,761 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:47,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1305371769, now seen corresponding path program 7 times [2024-11-12 08:21:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:47,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442365166] [2024-11-12 08:21:47,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:21:47,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:47,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442365166] [2024-11-12 08:21:47,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442365166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:47,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:47,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:21:47,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369511057] [2024-11-12 08:21:47,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:47,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:21:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:21:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:21:47,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:47,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1211 transitions, 29371 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:47,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:47,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:47,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:51,673 INFO L124 PetriNetUnfolderBase]: 6037/11022 cut-off events. [2024-11-12 08:21:51,674 INFO L125 PetriNetUnfolderBase]: For 264254/264257 co-relation queries the response was YES. [2024-11-12 08:21:51,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101737 conditions, 11022 events. 6037/11022 cut-off events. For 264254/264257 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 87287 event pairs, 146 based on Foata normal form. 54/11074 useless extension candidates. Maximal degree in co-relation 98743. Up to 3257 conditions per place. [2024-11-12 08:21:51,820 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 988 selfloop transitions, 488 changer transitions 0/1479 dead transitions. [2024-11-12 08:21:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1479 transitions, 35785 flow [2024-11-12 08:21:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:21:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:21:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-11-12 08:21:51,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-12 08:21:51,822 INFO L175 Difference]: Start difference. First operand has 207 places, 1211 transitions, 29371 flow. Second operand 7 states and 84 transitions. [2024-11-12 08:21:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1479 transitions, 35785 flow [2024-11-12 08:21:54,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1479 transitions, 35512 flow, removed 135 selfloop flow, removed 1 redundant places. [2024-11-12 08:21:54,627 INFO L231 Difference]: Finished difference. Result has 216 places, 1214 transitions, 30864 flow [2024-11-12 08:21:54,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28660, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=30864, PETRI_PLACES=216, PETRI_TRANSITIONS=1214} [2024-11-12 08:21:54,628 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-11-12 08:21:54,628 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 1214 transitions, 30864 flow [2024-11-12 08:21:54,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:54,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:54,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:54,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 08:21:54,629 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:54,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-11-12 08:21:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:54,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89720190] [2024-11-12 08:21:54,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:54,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:54,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89720190] [2024-11-12 08:21:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89720190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831900108] [2024-11-12 08:21:54,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:21:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:54,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:54,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 08:21:55,054 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:55,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:55,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 08:21:55,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:55,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831900108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:55,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:55,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-12 08:21:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303580721] [2024-11-12 08:21:55,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:55,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:21:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:21:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:21:55,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:21:55,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1214 transitions, 30864 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:55,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:55,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:21:55,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:02,449 INFO L124 PetriNetUnfolderBase]: 6939/12627 cut-off events. [2024-11-12 08:22:02,449 INFO L125 PetriNetUnfolderBase]: For 342062/342062 co-relation queries the response was YES. [2024-11-12 08:22:02,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123645 conditions, 12627 events. 6939/12627 cut-off events. For 342062/342062 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 102013 event pairs, 510 based on Foata normal form. 17/12643 useless extension candidates. Maximal degree in co-relation 119740. Up to 5956 conditions per place. [2024-11-12 08:22:02,574 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 557 selfloop transitions, 1062 changer transitions 18/1640 dead transitions. [2024-11-12 08:22:02,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1640 transitions, 44625 flow [2024-11-12 08:22:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 08:22:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-12 08:22:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 286 transitions. [2024-11-12 08:22:02,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-11-12 08:22:02,576 INFO L175 Difference]: Start difference. First operand has 216 places, 1214 transitions, 30864 flow. Second operand 25 states and 286 transitions. [2024-11-12 08:22:02,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1640 transitions, 44625 flow [2024-11-12 08:22:06,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1640 transitions, 44193 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-12 08:22:06,063 INFO L231 Difference]: Finished difference. Result has 251 places, 1515 transitions, 43541 flow [2024-11-12 08:22:06,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30568, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=43541, PETRI_PLACES=251, PETRI_TRANSITIONS=1515} [2024-11-12 08:22:06,065 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2024-11-12 08:22:06,065 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 1515 transitions, 43541 flow [2024-11-12 08:22:06,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:06,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:06,066 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:06,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 08:22:06,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 08:22:06,267 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:06,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935858, now seen corresponding path program 9 times [2024-11-12 08:22:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:06,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756391934] [2024-11-12 08:22:06,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:06,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756391934] [2024-11-12 08:22:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756391934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291137244] [2024-11-12 08:22:06,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:22:06,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:06,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:22:06,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 08:22:06,751 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:22:06,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:06,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 08:22:06,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:07,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:07,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291137244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:07,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:07,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-12 08:22:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144218450] [2024-11-12 08:22:07,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:07,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:22:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:22:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:22:07,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 1515 transitions, 43541 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:07,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:07,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:15,483 INFO L124 PetriNetUnfolderBase]: 8322/15085 cut-off events. [2024-11-12 08:22:15,484 INFO L125 PetriNetUnfolderBase]: For 486595/486598 co-relation queries the response was YES. [2024-11-12 08:22:15,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159263 conditions, 15085 events. 8322/15085 cut-off events. For 486595/486598 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 125128 event pairs, 660 based on Foata normal form. 21/15104 useless extension candidates. Maximal degree in co-relation 155877. Up to 7147 conditions per place. [2024-11-12 08:22:15,643 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 651 selfloop transitions, 1392 changer transitions 23/2069 dead transitions. [2024-11-12 08:22:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 2069 transitions, 63901 flow [2024-11-12 08:22:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 08:22:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-12 08:22:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 304 transitions. [2024-11-12 08:22:15,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-11-12 08:22:15,645 INFO L175 Difference]: Start difference. First operand has 251 places, 1515 transitions, 43541 flow. Second operand 27 states and 304 transitions. [2024-11-12 08:22:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 2069 transitions, 63901 flow [2024-11-12 08:22:20,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 2069 transitions, 60685 flow, removed 1532 selfloop flow, removed 6 redundant places. [2024-11-12 08:22:20,837 INFO L231 Difference]: Finished difference. Result has 285 places, 1938 transitions, 58452 flow [2024-11-12 08:22:20,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=41456, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=58452, PETRI_PLACES=285, PETRI_TRANSITIONS=1938} [2024-11-12 08:22:20,839 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2024-11-12 08:22:20,839 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 1938 transitions, 58452 flow [2024-11-12 08:22:20,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:20,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:20,840 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:20,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 08:22:21,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 08:22:21,045 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:21,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1209529878, now seen corresponding path program 10 times [2024-11-12 08:22:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:21,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723846037] [2024-11-12 08:22:21,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723846037] [2024-11-12 08:22:21,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723846037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422568442] [2024-11-12 08:22:21,090 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:22:21,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:21,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:22:21,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 08:22:21,138 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:22:21,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:21,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 08:22:21,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:21,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422568442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:21,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:21,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-12 08:22:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626586071] [2024-11-12 08:22:21,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:21,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 08:22:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 08:22:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:22:21,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:21,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1938 transitions, 58452 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:21,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:21,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:21,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:26,489 INFO L124 PetriNetUnfolderBase]: 5734/10375 cut-off events. [2024-11-12 08:22:26,490 INFO L125 PetriNetUnfolderBase]: For 376960/376960 co-relation queries the response was YES. [2024-11-12 08:22:26,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109476 conditions, 10375 events. 5734/10375 cut-off events. For 376960/376960 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 82475 event pairs, 363 based on Foata normal form. 628/11002 useless extension candidates. Maximal degree in co-relation 109362. Up to 6131 conditions per place. [2024-11-12 08:22:26,600 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 1150 selfloop transitions, 378 changer transitions 0/1531 dead transitions. [2024-11-12 08:22:26,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1531 transitions, 48823 flow [2024-11-12 08:22:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:22:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:22:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-12 08:22:26,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-12 08:22:26,601 INFO L175 Difference]: Start difference. First operand has 285 places, 1938 transitions, 58452 flow. Second operand 5 states and 64 transitions. [2024-11-12 08:22:26,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1531 transitions, 48823 flow [2024-11-12 08:22:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 1531 transitions, 45011 flow, removed 1849 selfloop flow, removed 18 redundant places. [2024-11-12 08:22:30,525 INFO L231 Difference]: Finished difference. Result has 266 places, 1369 transitions, 39429 flow [2024-11-12 08:22:30,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34556, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=39429, PETRI_PLACES=266, PETRI_TRANSITIONS=1369} [2024-11-12 08:22:30,527 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2024-11-12 08:22:30,527 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 1369 transitions, 39429 flow [2024-11-12 08:22:30,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:30,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:30,528 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:30,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 08:22:30,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:30,732 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:30,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1302550855, now seen corresponding path program 11 times [2024-11-12 08:22:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119892861] [2024-11-12 08:22:30,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119892861] [2024-11-12 08:22:30,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119892861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501093737] [2024-11-12 08:22:30,797 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:22:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:30,799 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:22:30,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 08:22:30,851 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-12 08:22:30,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:30,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:22:30,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:30,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:30,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501093737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:30,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:30,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-12 08:22:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013970269] [2024-11-12 08:22:30,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:30,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 08:22:30,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 08:22:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-12 08:22:30,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:30,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 1369 transitions, 39429 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:30,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:30,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:30,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand