./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:15:02,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:15:02,795 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:15:02,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:15:02,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:15:02,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:15:02,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:15:02,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:15:02,820 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:15:02,821 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:15:02,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:15:02,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:15:02,822 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:15:02,822 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:15:02,823 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:15:02,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:15:02,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:15:02,824 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:15:02,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:15:02,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:15:02,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:15:02,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:15:02,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:15:02,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:15:02,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:15:02,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:15:02,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:15:02,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:15:02,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:15:02,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:15:02,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:15:02,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:15:02,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:02,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:15:02,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:15:02,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:15:02,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:15:02,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-10-13 07:15:03,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:15:03,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:15:03,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:15:03,132 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:15:03,132 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:15:03,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-10-13 07:15:04,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:15:04,789 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:15:04,790 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-10-13 07:15:04,797 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a82115f/43b5feed0c294d178c2d51d900791c7c/FLAG241bf9107 [2024-10-13 07:15:04,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a82115f/43b5feed0c294d178c2d51d900791c7c [2024-10-13 07:15:04,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:15:04,813 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:15:04,814 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:04,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:15:04,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:15:04,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:04" (1/1) ... [2024-10-13 07:15:04,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a2b020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:04, skipping insertion in model container [2024-10-13 07:15:04,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:04" (1/1) ... [2024-10-13 07:15:04,844 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:15:05,101 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-10-13 07:15:05,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:05,116 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:15:05,137 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-10-13 07:15:05,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:05,157 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:15:05,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05 WrapperNode [2024-10-13 07:15:05,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:05,159 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:05,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:15:05,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:15:05,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,188 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-10-13 07:15:05,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:05,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:15:05,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:15:05,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:15:05,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,210 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-13 07:15:05,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:15:05,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:15:05,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:15:05,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:15:05,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (1/1) ... [2024-10-13 07:15:05,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:05,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:15:05,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:15:05,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:15:05,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:15:05,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:15:05,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:15:05,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:15:05,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:15:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:15:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:15:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:15:05,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:15:05,318 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:15:05,414 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:15:05,416 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:15:05,608 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:15:05,608 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:15:05,767 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:15:05,767 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 07:15:05,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:05 BoogieIcfgContainer [2024-10-13 07:15:05,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:15:05,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:15:05,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:15:05,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:15:05,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:04" (1/3) ... [2024-10-13 07:15:05,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2607c1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:05, skipping insertion in model container [2024-10-13 07:15:05,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:05" (2/3) ... [2024-10-13 07:15:05,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2607c1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:05, skipping insertion in model container [2024-10-13 07:15:05,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:05" (3/3) ... [2024-10-13 07:15:05,780 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-10-13 07:15:05,797 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:15:05,798 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:15:05,798 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:15:05,841 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:15:05,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-13 07:15:05,899 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-13 07:15:05,899 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:15:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-13 07:15:05,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-13 07:15:05,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-13 07:15:05,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:15:05,920 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;@193d86cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:15:05,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:15:05,931 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:15:05,935 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-13 07:15:05,935 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:15:05,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:05,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:05,937 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:05,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -724561697, now seen corresponding path program 1 times [2024-10-13 07:15:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152520040] [2024-10-13 07:15:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:06,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152520040] [2024-10-13 07:15:06,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152520040] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:06,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:15:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633803283] [2024-10-13 07:15:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:06,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:15:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:15:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:15:06,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-13 07:15:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:06,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:06,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-13 07:15:06,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:06,422 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-10-13 07:15:06,422 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-13 07:15:06,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-10-13 07:15:06,428 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-10-13 07:15:06,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-10-13 07:15:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-13 07:15:06,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-10-13 07:15:06,440 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-10-13 07:15:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-10-13 07:15:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:15:06,445 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-10-13 07:15:06,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-10-13 07:15:06,450 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-10-13 07:15:06,450 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-10-13 07:15:06,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:06,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:06,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:06,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:15:06,451 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:06,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash -332040435, now seen corresponding path program 1 times [2024-10-13 07:15:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89520542] [2024-10-13 07:15:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:06,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89520542] [2024-10-13 07:15:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89520542] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:06,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:15:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256968806] [2024-10-13 07:15:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:06,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:15:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:15:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:15:06,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-13 07:15:06,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:06,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:06,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-13 07:15:06,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:06,757 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-10-13 07:15:06,757 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-10-13 07:15:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-10-13 07:15:06,765 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-13 07:15:06,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-10-13 07:15:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-13 07:15:06,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-10-13 07:15:06,769 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-10-13 07:15:06,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-10-13 07:15:06,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:06,771 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-13 07:15:06,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-13 07:15:06,772 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-13 07:15:06,776 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-13 07:15:06,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:06,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:06,777 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:06,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:15:06,777 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:06,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash -585986627, now seen corresponding path program 1 times [2024-10-13 07:15:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:06,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287860872] [2024-10-13 07:15:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:06,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:06,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:06,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287860872] [2024-10-13 07:15:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287860872] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279359456] [2024-10-13 07:15:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:06,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:06,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:07,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:07,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:15:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:07,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:15:07,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:07,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279359456] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:07,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:15:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-10-13 07:15:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463060644] [2024-10-13 07:15:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:07,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:15:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:15:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:15:07,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-13 07:15:07,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 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) [2024-10-13 07:15:07,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:07,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-13 07:15:07,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:07,544 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-10-13 07:15:07,545 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-10-13 07:15:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1135 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-10-13 07:15:07,550 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-10-13 07:15:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-10-13 07:15:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-10-13 07:15:07,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-10-13 07:15:07,554 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-10-13 07:15:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-10-13 07:15:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:07,558 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-10-13 07:15:07,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-10-13 07:15:07,559 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-10-13 07:15:07,560 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-10-13 07:15:07,560 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) [2024-10-13 07:15:07,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:07,561 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:07,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:15:07,764 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 [2024-10-13 07:15:07,765 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:07,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash -859289679, now seen corresponding path program 2 times [2024-10-13 07:15:07,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:07,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006805035] [2024-10-13 07:15:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:07,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006805035] [2024-10-13 07:15:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006805035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472700045] [2024-10-13 07:15:07,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:07,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:07,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:07,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:15:08,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:08,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:15:08,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:08,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472700045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:08,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-13 07:15:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662201565] [2024-10-13 07:15:08,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:08,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:15:08,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:15:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:15:08,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:15:08,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:08,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:08,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:15:08,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:08,421 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-10-13 07:15:08,421 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-10-13 07:15:08,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2168 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-10-13 07:15:08,429 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-10-13 07:15:08,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-10-13 07:15:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:15:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:15:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-10-13 07:15:08,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-10-13 07:15:08,431 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-10-13 07:15:08,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-10-13 07:15:08,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:15:08,434 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-10-13 07:15:08,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-10-13 07:15:08,435 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-10-13 07:15:08,435 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-10-13 07:15:08,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:08,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:08,436 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:08,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:15:08,636 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 [2024-10-13 07:15:08,637 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:08,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1514086461, now seen corresponding path program 3 times [2024-10-13 07:15:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:08,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13439863] [2024-10-13 07:15:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:08,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13439863] [2024-10-13 07:15:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13439863] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:08,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090324672] [2024-10-13 07:15:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:08,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:08,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:15:08,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:15:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:08,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:15:08,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:09,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090324672] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:09,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:09,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:15:09,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865446273] [2024-10-13 07:15:09,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:09,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:15:09,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:09,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:15:09,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:15:09,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:09,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:09,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:09,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:10,124 INFO L124 PetriNetUnfolderBase]: 643/1108 cut-off events. [2024-10-13 07:15:10,124 INFO L125 PetriNetUnfolderBase]: For 1935/1935 co-relation queries the response was YES. [2024-10-13 07:15:10,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 1108 events. 643/1108 cut-off events. For 1935/1935 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4887 event pairs, 20 based on Foata normal form. 38/1146 useless extension candidates. Maximal degree in co-relation 2620. Up to 229 conditions per place. [2024-10-13 07:15:10,133 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 140 selfloop transitions, 81 changer transitions 22/244 dead transitions. [2024-10-13 07:15:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 244 transitions, 1705 flow [2024-10-13 07:15:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-13 07:15:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-10-13 07:15:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 330 transitions. [2024-10-13 07:15:10,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-10-13 07:15:10,140 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 39 states and 330 transitions. [2024-10-13 07:15:10,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 244 transitions, 1705 flow [2024-10-13 07:15:10,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 244 transitions, 1697 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-13 07:15:10,152 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 966 flow [2024-10-13 07:15:10,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=966, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-10-13 07:15:10,153 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2024-10-13 07:15:10,154 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 966 flow [2024-10-13 07:15:10,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:10,154 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:10,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:15:10,358 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 [2024-10-13 07:15:10,359 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:10,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 770529667, now seen corresponding path program 4 times [2024-10-13 07:15:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:10,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872415503] [2024-10-13 07:15:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:10,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872415503] [2024-10-13 07:15:10,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872415503] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089821303] [2024-10-13 07:15:10,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:15:10,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:10,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:10,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:10,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:15:10,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:15:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:10,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:15:10,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:10,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089821303] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:10,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-10-13 07:15:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865583625] [2024-10-13 07:15:10,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:10,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:15:10,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:15:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:15:10,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:10,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 966 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:10,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:11,563 INFO L124 PetriNetUnfolderBase]: 1021/1737 cut-off events. [2024-10-13 07:15:11,563 INFO L125 PetriNetUnfolderBase]: For 18636/18636 co-relation queries the response was YES. [2024-10-13 07:15:11,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 1737 events. 1021/1737 cut-off events. For 18636/18636 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8429 event pairs, 28 based on Foata normal form. 87/1824 useless extension candidates. Maximal degree in co-relation 8431. Up to 328 conditions per place. [2024-10-13 07:15:11,587 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 147 selfloop transitions, 158 changer transitions 3/309 dead transitions. [2024-10-13 07:15:11,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 309 transitions, 3418 flow [2024-10-13 07:15:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 07:15:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-13 07:15:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 249 transitions. [2024-10-13 07:15:11,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-13 07:15:11,590 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 966 flow. Second operand 28 states and 249 transitions. [2024-10-13 07:15:11,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 309 transitions, 3418 flow [2024-10-13 07:15:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 309 transitions, 3195 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-10-13 07:15:11,660 INFO L231 Difference]: Finished difference. Result has 135 places, 196 transitions, 2416 flow [2024-10-13 07:15:11,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2416, PETRI_PLACES=135, PETRI_TRANSITIONS=196} [2024-10-13 07:15:11,661 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 112 predicate places. [2024-10-13 07:15:11,661 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 196 transitions, 2416 flow [2024-10-13 07:15:11,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:11,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:11,662 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:11,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:15:11,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:11,867 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:11,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash -580098091, now seen corresponding path program 5 times [2024-10-13 07:15:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:11,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137235065] [2024-10-13 07:15:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137235065] [2024-10-13 07:15:11,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137235065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525633818] [2024-10-13 07:15:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:15:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:11,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:11,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:15:12,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:15:12,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:12,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:12,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525633818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:12,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:12,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-13 07:15:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356881453] [2024-10-13 07:15:12,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:12,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:15:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:15:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:15:12,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:12,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 196 transitions, 2416 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:12,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:12,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:12,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:13,943 INFO L124 PetriNetUnfolderBase]: 1806/3067 cut-off events. [2024-10-13 07:15:13,943 INFO L125 PetriNetUnfolderBase]: For 64642/64642 co-relation queries the response was YES. [2024-10-13 07:15:13,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20851 conditions, 3067 events. 1806/3067 cut-off events. For 64642/64642 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16471 event pairs, 14 based on Foata normal form. 85/3152 useless extension candidates. Maximal degree in co-relation 17157. Up to 577 conditions per place. [2024-10-13 07:15:13,990 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 205 selfloop transitions, 342 changer transitions 2/550 dead transitions. [2024-10-13 07:15:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 550 transitions, 7648 flow [2024-10-13 07:15:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 07:15:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-10-13 07:15:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 409 transitions. [2024-10-13 07:15:13,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3974732750242954 [2024-10-13 07:15:13,993 INFO L175 Difference]: Start difference. First operand has 135 places, 196 transitions, 2416 flow. Second operand 49 states and 409 transitions. [2024-10-13 07:15:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 550 transitions, 7648 flow [2024-10-13 07:15:14,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 550 transitions, 7387 flow, removed 125 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:14,242 INFO L231 Difference]: Finished difference. Result has 211 places, 406 transitions, 6160 flow [2024-10-13 07:15:14,243 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6160, PETRI_PLACES=211, PETRI_TRANSITIONS=406} [2024-10-13 07:15:14,244 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 188 predicate places. [2024-10-13 07:15:14,244 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 406 transitions, 6160 flow [2024-10-13 07:15:14,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:14,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:14,244 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:14,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:15:14,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:14,445 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:14,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash -406850399, now seen corresponding path program 6 times [2024-10-13 07:15:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:14,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591532875] [2024-10-13 07:15:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:14,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591532875] [2024-10-13 07:15:14,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591532875] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:14,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195507137] [2024-10-13 07:15:14,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:15:14,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:14,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:14,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:14,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:15:14,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:15:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:14,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:14,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:14,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195507137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:14,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:14,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-13 07:15:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994876201] [2024-10-13 07:15:14,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:14,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:15:14,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:15:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:15:14,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:14,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 406 transitions, 6160 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:14,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:14,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:14,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:16,184 INFO L124 PetriNetUnfolderBase]: 1755/2934 cut-off events. [2024-10-13 07:15:16,184 INFO L125 PetriNetUnfolderBase]: For 102820/102820 co-relation queries the response was YES. [2024-10-13 07:15:16,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25804 conditions, 2934 events. 1755/2934 cut-off events. For 102820/102820 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15381 event pairs, 26 based on Foata normal form. 18/2952 useless extension candidates. Maximal degree in co-relation 24991. Up to 640 conditions per place. [2024-10-13 07:15:16,231 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 260 selfloop transitions, 251 changer transitions 2/514 dead transitions. [2024-10-13 07:15:16,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 514 transitions, 9200 flow [2024-10-13 07:15:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 07:15:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-13 07:15:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 235 transitions. [2024-10-13 07:15:16,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4144620811287478 [2024-10-13 07:15:16,233 INFO L175 Difference]: Start difference. First operand has 211 places, 406 transitions, 6160 flow. Second operand 27 states and 235 transitions. [2024-10-13 07:15:16,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 514 transitions, 9200 flow [2024-10-13 07:15:16,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 514 transitions, 8547 flow, removed 303 selfloop flow, removed 9 redundant places. [2024-10-13 07:15:16,627 INFO L231 Difference]: Finished difference. Result has 237 places, 421 transitions, 6615 flow [2024-10-13 07:15:16,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6615, PETRI_PLACES=237, PETRI_TRANSITIONS=421} [2024-10-13 07:15:16,628 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 214 predicate places. [2024-10-13 07:15:16,628 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 421 transitions, 6615 flow [2024-10-13 07:15:16,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:16,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:16,629 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:16,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 07:15:16,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:16,830 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:16,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:16,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1453803489, now seen corresponding path program 7 times [2024-10-13 07:15:16,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:16,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004029715] [2024-10-13 07:15:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:16,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004029715] [2024-10-13 07:15:17,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004029715] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535260985] [2024-10-13 07:15:17,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:15:17,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:17,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:17,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:17,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:15:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:17,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:17,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:17,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535260985] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:17,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:17,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:15:17,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624598432] [2024-10-13 07:15:17,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:17,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:15:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:15:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:15:17,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:17,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 421 transitions, 6615 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:17,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:17,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:17,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:18,875 INFO L124 PetriNetUnfolderBase]: 2132/3537 cut-off events. [2024-10-13 07:15:18,876 INFO L125 PetriNetUnfolderBase]: For 141258/141258 co-relation queries the response was YES. [2024-10-13 07:15:18,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31903 conditions, 3537 events. 2132/3537 cut-off events. For 141258/141258 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19216 event pairs, 41 based on Foata normal form. 16/3553 useless extension candidates. Maximal degree in co-relation 31326. Up to 712 conditions per place. [2024-10-13 07:15:18,926 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 305 selfloop transitions, 336 changer transitions 4/646 dead transitions. [2024-10-13 07:15:18,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 646 transitions, 11544 flow [2024-10-13 07:15:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 07:15:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-13 07:15:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 275 transitions. [2024-10-13 07:15:18,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3851540616246499 [2024-10-13 07:15:18,930 INFO L175 Difference]: Start difference. First operand has 237 places, 421 transitions, 6615 flow. Second operand 34 states and 275 transitions. [2024-10-13 07:15:18,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 646 transitions, 11544 flow [2024-10-13 07:15:19,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 646 transitions, 10911 flow, removed 106 selfloop flow, removed 17 redundant places. [2024-10-13 07:15:19,574 INFO L231 Difference]: Finished difference. Result has 261 places, 514 transitions, 8621 flow [2024-10-13 07:15:19,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8621, PETRI_PLACES=261, PETRI_TRANSITIONS=514} [2024-10-13 07:15:19,577 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2024-10-13 07:15:19,577 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 514 transitions, 8621 flow [2024-10-13 07:15:19,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:19,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:19,578 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:19,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:15:19,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:19,779 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:19,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 742700219, now seen corresponding path program 8 times [2024-10-13 07:15:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:19,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236341659] [2024-10-13 07:15:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:20,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236341659] [2024-10-13 07:15:20,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236341659] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684230732] [2024-10-13 07:15:20,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:20,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:20,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:15:20,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:20,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:20,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:20,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684230732] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:20,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:20,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-13 07:15:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178595915] [2024-10-13 07:15:20,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:20,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:15:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:15:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:15:20,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:20,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 514 transitions, 8621 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:20,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:20,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:20,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:22,024 INFO L124 PetriNetUnfolderBase]: 2803/4676 cut-off events. [2024-10-13 07:15:22,024 INFO L125 PetriNetUnfolderBase]: For 237970/237970 co-relation queries the response was YES. [2024-10-13 07:15:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 4676 events. 2803/4676 cut-off events. For 237970/237970 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26798 event pairs, 37 based on Foata normal form. 83/4759 useless extension candidates. Maximal degree in co-relation 42860. Up to 862 conditions per place. [2024-10-13 07:15:22,078 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 246 selfloop transitions, 612 changer transitions 2/861 dead transitions. [2024-10-13 07:15:22,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 861 transitions, 15915 flow [2024-10-13 07:15:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-13 07:15:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-13 07:15:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 379 transitions. [2024-10-13 07:15:22,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39233954451345754 [2024-10-13 07:15:22,083 INFO L175 Difference]: Start difference. First operand has 261 places, 514 transitions, 8621 flow. Second operand 46 states and 379 transitions. [2024-10-13 07:15:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 861 transitions, 15915 flow [2024-10-13 07:15:23,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 861 transitions, 14962 flow, removed 406 selfloop flow, removed 12 redundant places. [2024-10-13 07:15:23,537 INFO L231 Difference]: Finished difference. Result has 314 places, 728 transitions, 13966 flow [2024-10-13 07:15:23,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=13966, PETRI_PLACES=314, PETRI_TRANSITIONS=728} [2024-10-13 07:15:23,539 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2024-10-13 07:15:23,539 INFO L471 AbstractCegarLoop]: Abstraction has has 314 places, 728 transitions, 13966 flow [2024-10-13 07:15:23,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:23,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:23,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:23,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:15:23,740 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,SelfDestructingSolverStorable9 [2024-10-13 07:15:23,741 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:23,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 915947911, now seen corresponding path program 9 times [2024-10-13 07:15:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:23,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056917467] [2024-10-13 07:15:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:23,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056917467] [2024-10-13 07:15:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056917467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969161242] [2024-10-13 07:15:23,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:23,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:23,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:23,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:15:23,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 07:15:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:23,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:23,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:24,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969161242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:24,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:24,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-13 07:15:24,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656779335] [2024-10-13 07:15:24,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:24,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:15:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:15:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:15:24,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:24,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 728 transitions, 13966 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:24,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:24,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:24,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:25,704 INFO L124 PetriNetUnfolderBase]: 2798/4677 cut-off events. [2024-10-13 07:15:25,704 INFO L125 PetriNetUnfolderBase]: For 208320/208320 co-relation queries the response was YES. [2024-10-13 07:15:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 4677 events. 2798/4677 cut-off events. For 208320/208320 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26866 event pairs, 69 based on Foata normal form. 18/4695 useless extension candidates. Maximal degree in co-relation 45712. Up to 991 conditions per place. [2024-10-13 07:15:25,792 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 362 selfloop transitions, 446 changer transitions 3/812 dead transitions. [2024-10-13 07:15:25,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 812 transitions, 16982 flow [2024-10-13 07:15:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 07:15:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-13 07:15:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 222 transitions. [2024-10-13 07:15:25,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-10-13 07:15:25,795 INFO L175 Difference]: Start difference. First operand has 314 places, 728 transitions, 13966 flow. Second operand 25 states and 222 transitions. [2024-10-13 07:15:25,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 812 transitions, 16982 flow [2024-10-13 07:15:26,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 812 transitions, 16423 flow, removed 253 selfloop flow, removed 13 redundant places. [2024-10-13 07:15:26,957 INFO L231 Difference]: Finished difference. Result has 328 places, 729 transitions, 14625 flow [2024-10-13 07:15:26,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13320, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14625, PETRI_PLACES=328, PETRI_TRANSITIONS=729} [2024-10-13 07:15:26,958 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 305 predicate places. [2024-10-13 07:15:26,958 INFO L471 AbstractCegarLoop]: Abstraction has has 328 places, 729 transitions, 14625 flow [2024-10-13 07:15:26,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:26,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:26,958 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:26,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:27,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:27,159 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:27,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -947772703, now seen corresponding path program 10 times [2024-10-13 07:15:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:27,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010178902] [2024-10-13 07:15:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010178902] [2024-10-13 07:15:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010178902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238624761] [2024-10-13 07:15:27,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:15:27,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:27,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:27,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:15:27,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:15:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:27,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:15:27,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:27,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238624761] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:27,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-13 07:15:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440821441] [2024-10-13 07:15:27,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:27,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:15:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:15:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:15:27,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:27,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 729 transitions, 14625 flow. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:27,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:27,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:27,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:29,946 INFO L124 PetriNetUnfolderBase]: 3832/6404 cut-off events. [2024-10-13 07:15:29,946 INFO L125 PetriNetUnfolderBase]: For 271595/271595 co-relation queries the response was YES. [2024-10-13 07:15:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65481 conditions, 6404 events. 3832/6404 cut-off events. For 271595/271595 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 38079 event pairs, 35 based on Foata normal form. 73/6477 useless extension candidates. Maximal degree in co-relation 64376. Up to 1682 conditions per place. [2024-10-13 07:15:30,022 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 452 selfloop transitions, 733 changer transitions 10/1196 dead transitions. [2024-10-13 07:15:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1196 transitions, 26420 flow [2024-10-13 07:15:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-13 07:15:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-13 07:15:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 317 transitions. [2024-10-13 07:15:30,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39724310776942356 [2024-10-13 07:15:30,026 INFO L175 Difference]: Start difference. First operand has 328 places, 729 transitions, 14625 flow. Second operand 38 states and 317 transitions. [2024-10-13 07:15:30,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1196 transitions, 26420 flow [2024-10-13 07:15:31,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1196 transitions, 25258 flow, removed 69 selfloop flow, removed 23 redundant places. [2024-10-13 07:15:31,972 INFO L231 Difference]: Finished difference. Result has 350 places, 1001 transitions, 22395 flow [2024-10-13 07:15:31,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13879, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22395, PETRI_PLACES=350, PETRI_TRANSITIONS=1001} [2024-10-13 07:15:31,974 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 327 predicate places. [2024-10-13 07:15:31,974 INFO L471 AbstractCegarLoop]: Abstraction has has 350 places, 1001 transitions, 22395 flow [2024-10-13 07:15:31,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:31,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:31,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:31,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 07:15:32,176 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,SelfDestructingSolverStorable11 [2024-10-13 07:15:32,177 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:32,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:32,177 INFO L85 PathProgramCache]: Analyzing trace with hash -237964925, now seen corresponding path program 11 times [2024-10-13 07:15:32,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:32,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712434251] [2024-10-13 07:15:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:32,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:32,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712434251] [2024-10-13 07:15:32,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712434251] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062618346] [2024-10-13 07:15:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:15:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:32,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:32,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:15:32,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:15:32,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:32,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:32,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:32,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062618346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:32,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:15:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973706255] [2024-10-13 07:15:32,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:32,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:15:32,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:15:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:15:32,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:32,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1001 transitions, 22395 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:32,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:32,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:32,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:35,002 INFO L124 PetriNetUnfolderBase]: 4131/6841 cut-off events. [2024-10-13 07:15:35,002 INFO L125 PetriNetUnfolderBase]: For 299173/299173 co-relation queries the response was YES. [2024-10-13 07:15:35,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73590 conditions, 6841 events. 4131/6841 cut-off events. For 299173/299173 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 40969 event pairs, 95 based on Foata normal form. 18/6859 useless extension candidates. Maximal degree in co-relation 72923. Up to 1457 conditions per place. [2024-10-13 07:15:35,084 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 605 selfloop transitions, 574 changer transitions 4/1184 dead transitions. [2024-10-13 07:15:35,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1184 transitions, 28521 flow [2024-10-13 07:15:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:15:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:15:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 165 transitions. [2024-10-13 07:15:35,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2024-10-13 07:15:35,086 INFO L175 Difference]: Start difference. First operand has 350 places, 1001 transitions, 22395 flow. Second operand 19 states and 165 transitions. [2024-10-13 07:15:35,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1184 transitions, 28521 flow [2024-10-13 07:15:37,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1184 transitions, 28011 flow, removed 120 selfloop flow, removed 19 redundant places. [2024-10-13 07:15:37,770 INFO L231 Difference]: Finished difference. Result has 355 places, 1066 transitions, 25167 flow [2024-10-13 07:15:37,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21970, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25167, PETRI_PLACES=355, PETRI_TRANSITIONS=1066} [2024-10-13 07:15:37,772 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 332 predicate places. [2024-10-13 07:15:37,772 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 1066 transitions, 25167 flow [2024-10-13 07:15:37,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:37,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:37,773 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:37,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:37,973 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,SelfDestructingSolverStorable12 [2024-10-13 07:15:37,973 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:37,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1955116159, now seen corresponding path program 12 times [2024-10-13 07:15:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834604894] [2024-10-13 07:15:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:37,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834604894] [2024-10-13 07:15:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834604894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685673928] [2024-10-13 07:15:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:15:38,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:38,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:38,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:15:38,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:15:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:38,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:38,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:38,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:38,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685673928] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:38,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:38,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:15:38,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487326009] [2024-10-13 07:15:38,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:38,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:15:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:15:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:15:38,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:38,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1066 transitions, 25167 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:38,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:38,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:38,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:41,428 INFO L124 PetriNetUnfolderBase]: 4684/7732 cut-off events. [2024-10-13 07:15:41,429 INFO L125 PetriNetUnfolderBase]: For 353251/353251 co-relation queries the response was YES. [2024-10-13 07:15:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84888 conditions, 7732 events. 4684/7732 cut-off events. For 353251/353251 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47523 event pairs, 193 based on Foata normal form. 32/7764 useless extension candidates. Maximal degree in co-relation 84017. Up to 6181 conditions per place. [2024-10-13 07:15:41,517 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1120 selfloop transitions, 165 changer transitions 2/1288 dead transitions. [2024-10-13 07:15:41,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1288 transitions, 32014 flow [2024-10-13 07:15:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:15:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:15:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2024-10-13 07:15:41,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-10-13 07:15:41,519 INFO L175 Difference]: Start difference. First operand has 355 places, 1066 transitions, 25167 flow. Second operand 20 states and 176 transitions. [2024-10-13 07:15:41,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1288 transitions, 32014 flow [2024-10-13 07:15:44,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1288 transitions, 31739 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-10-13 07:15:45,016 INFO L231 Difference]: Finished difference. Result has 370 places, 1162 transitions, 27535 flow [2024-10-13 07:15:45,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24894, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27535, PETRI_PLACES=370, PETRI_TRANSITIONS=1162} [2024-10-13 07:15:45,018 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 347 predicate places. [2024-10-13 07:15:45,018 INFO L471 AbstractCegarLoop]: Abstraction has has 370 places, 1162 transitions, 27535 flow [2024-10-13 07:15:45,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:45,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:45,018 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:45,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:45,219 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,SelfDestructingSolverStorable13 [2024-10-13 07:15:45,219 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:45,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 470355489, now seen corresponding path program 13 times [2024-10-13 07:15:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092543038] [2024-10-13 07:15:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092543038] [2024-10-13 07:15:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092543038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855711508] [2024-10-13 07:15:45,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:15:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:45,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:45,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:15:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:45,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:15:45,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:45,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855711508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:45,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:45,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-10-13 07:15:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249562019] [2024-10-13 07:15:45,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:45,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 07:15:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 07:15:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-10-13 07:15:45,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:45,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1162 transitions, 27535 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:45,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:45,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:45,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:48,915 INFO L124 PetriNetUnfolderBase]: 4904/8120 cut-off events. [2024-10-13 07:15:48,915 INFO L125 PetriNetUnfolderBase]: For 422256/422256 co-relation queries the response was YES. [2024-10-13 07:15:48,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91667 conditions, 8120 events. 4904/8120 cut-off events. For 422256/422256 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 50641 event pairs, 50 based on Foata normal form. 139/8259 useless extension candidates. Maximal degree in co-relation 91387. Up to 3923 conditions per place. [2024-10-13 07:15:49,016 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 727 selfloop transitions, 675 changer transitions 5/1408 dead transitions. [2024-10-13 07:15:49,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1408 transitions, 35134 flow [2024-10-13 07:15:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:15:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:15:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 232 transitions. [2024-10-13 07:15:49,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-10-13 07:15:49,017 INFO L175 Difference]: Start difference. First operand has 370 places, 1162 transitions, 27535 flow. Second operand 26 states and 232 transitions. [2024-10-13 07:15:49,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1408 transitions, 35134 flow [2024-10-13 07:15:53,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1408 transitions, 34788 flow, removed 153 selfloop flow, removed 6 redundant places. [2024-10-13 07:15:53,267 INFO L231 Difference]: Finished difference. Result has 403 places, 1235 transitions, 31779 flow [2024-10-13 07:15:53,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26971, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31779, PETRI_PLACES=403, PETRI_TRANSITIONS=1235} [2024-10-13 07:15:53,269 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2024-10-13 07:15:53,269 INFO L471 AbstractCegarLoop]: Abstraction has has 403 places, 1235 transitions, 31779 flow [2024-10-13 07:15:53,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:53,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:53,270 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:53,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:53,470 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,SelfDestructingSolverStorable14 [2024-10-13 07:15:53,471 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:53,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1003331741, now seen corresponding path program 14 times [2024-10-13 07:15:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:53,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649885713] [2024-10-13 07:15:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:53,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:53,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:53,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649885713] [2024-10-13 07:15:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649885713] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241648302] [2024-10-13 07:15:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:53,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:53,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:15:53,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:53,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:53,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:53,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:53,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:53,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241648302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:53,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-10-13 07:15:53,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138432385] [2024-10-13 07:15:53,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:53,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:15:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:15:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:15:53,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:15:53,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1235 transitions, 31779 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:53,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:53,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:15:53,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:57,046 INFO L124 PetriNetUnfolderBase]: 5010/8266 cut-off events. [2024-10-13 07:15:57,047 INFO L125 PetriNetUnfolderBase]: For 518062/518062 co-relation queries the response was YES. [2024-10-13 07:15:57,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100129 conditions, 8266 events. 5010/8266 cut-off events. For 518062/518062 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 51107 event pairs, 227 based on Foata normal form. 8/8274 useless extension candidates. Maximal degree in co-relation 99371. Up to 7052 conditions per place. [2024-10-13 07:15:57,316 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1185 selfloop transitions, 155 changer transitions 2/1343 dead transitions. [2024-10-13 07:15:57,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1343 transitions, 37079 flow [2024-10-13 07:15:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 07:15:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-13 07:15:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 131 transitions. [2024-10-13 07:15:57,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2024-10-13 07:15:57,318 INFO L175 Difference]: Start difference. First operand has 403 places, 1235 transitions, 31779 flow. Second operand 15 states and 131 transitions. [2024-10-13 07:15:57,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1343 transitions, 37079 flow [2024-10-13 07:16:01,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1343 transitions, 36534 flow, removed 228 selfloop flow, removed 7 redundant places. [2024-10-13 07:16:01,943 INFO L231 Difference]: Finished difference. Result has 414 places, 1275 transitions, 32934 flow [2024-10-13 07:16:01,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31335, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32934, PETRI_PLACES=414, PETRI_TRANSITIONS=1275} [2024-10-13 07:16:01,945 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 391 predicate places. [2024-10-13 07:16:01,945 INFO L471 AbstractCegarLoop]: Abstraction has has 414 places, 1275 transitions, 32934 flow [2024-10-13 07:16:01,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:01,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:01,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:01,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 07:16:02,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:02,147 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:02,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash 247132817, now seen corresponding path program 15 times [2024-10-13 07:16:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708746399] [2024-10-13 07:16:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708746399] [2024-10-13 07:16:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708746399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258815605] [2024-10-13 07:16:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:16:02,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:02,249 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:02,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 07:16:02,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:16:02,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:02,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:16:02,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:02,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258815605] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:02,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-10-13 07:16:02,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675435186] [2024-10-13 07:16:02,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:02,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:16:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:16:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:16:02,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:16:02,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1275 transitions, 32934 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:02,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:02,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:16:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:06,207 INFO L124 PetriNetUnfolderBase]: 5331/8806 cut-off events. [2024-10-13 07:16:06,207 INFO L125 PetriNetUnfolderBase]: For 526647/526647 co-relation queries the response was YES. [2024-10-13 07:16:06,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106615 conditions, 8806 events. 5331/8806 cut-off events. For 526647/526647 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55152 event pairs, 61 based on Foata normal form. 75/8881 useless extension candidates. Maximal degree in co-relation 105959. Up to 3774 conditions per place. [2024-10-13 07:16:06,508 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 712 selfloop transitions, 784 changer transitions 1/1498 dead transitions. [2024-10-13 07:16:06,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1498 transitions, 40465 flow [2024-10-13 07:16:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-13 07:16:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-13 07:16:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2024-10-13 07:16:06,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2024-10-13 07:16:06,509 INFO L175 Difference]: Start difference. First operand has 414 places, 1275 transitions, 32934 flow. Second operand 25 states and 213 transitions. [2024-10-13 07:16:06,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1498 transitions, 40465 flow [2024-10-13 07:16:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1498 transitions, 40253 flow, removed 54 selfloop flow, removed 11 redundant places. [2024-10-13 07:16:11,844 INFO L231 Difference]: Finished difference. Result has 433 places, 1344 transitions, 37615 flow [2024-10-13 07:16:11,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32638, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=37615, PETRI_PLACES=433, PETRI_TRANSITIONS=1344} [2024-10-13 07:16:11,845 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 410 predicate places. [2024-10-13 07:16:11,846 INFO L471 AbstractCegarLoop]: Abstraction has has 433 places, 1344 transitions, 37615 flow [2024-10-13 07:16:11,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:11,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:11,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:11,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 07:16:12,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:16:12,047 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:12,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 843433417, now seen corresponding path program 16 times [2024-10-13 07:16:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143512430] [2024-10-13 07:16:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143512430] [2024-10-13 07:16:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143512430] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422754993] [2024-10-13 07:16:12,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:16:12,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:12,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:12,123 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:12,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 07:16:12,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:16:12,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:12,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:16:12,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:12,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:12,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422754993] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:12,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:12,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 11] total 21 [2024-10-13 07:16:12,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614415877] [2024-10-13 07:16:12,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:12,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:16:12,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:16:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:16:12,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:16:12,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1344 transitions, 37615 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:12,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:12,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:16:12,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand