./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-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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-figure3.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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:39:25,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:39:25,803 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:39:25,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:39:25,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:39:25,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:39:25,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:39:25,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:39:25,828 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:39:25,828 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:39:25,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:39:25,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:39:25,829 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:39:25,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:39:25,830 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:39:25,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:39:25,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:39:25,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:39:25,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:39:25,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:39:25,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:39:25,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:39:25,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:39:25,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:39:25,832 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:39:25,833 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:39:25,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:39:25,833 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:39:25,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:39:25,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:39:25,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:39:25,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:39:25,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:39:25,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:39:25,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:39:25,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:39:25,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:39:25,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:39:25,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:39:25,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:39:25,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:39:25,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:39:25,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2024-10-14 14:39:26,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:39:26,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:39:26,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:39:26,062 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:39:26,062 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:39:26,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-14 14:39:27,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:39:27,476 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:39:27,477 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-14 14:39:27,484 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b001d862a/aee8057c83684788b106ec5bf13e8a35/FLAG7e97dc060 [2024-10-14 14:39:27,494 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b001d862a/aee8057c83684788b106ec5bf13e8a35 [2024-10-14 14:39:27,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:39:27,497 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:39:27,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:39:27,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:39:27,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:39:27,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e45c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27, skipping insertion in model container [2024-10-14 14:39:27,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,522 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:39:27,652 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-figure3.wvr.c[2147,2160] [2024-10-14 14:39:27,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:39:27,661 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:39:27,674 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-figure3.wvr.c[2147,2160] [2024-10-14 14:39:27,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:39:27,686 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:39:27,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27 WrapperNode [2024-10-14 14:39:27,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:39:27,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:39:27,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:39:27,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:39:27,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,711 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-10-14 14:39:27,712 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:39:27,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:39:27,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:39:27,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:39:27,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,748 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]. [2024-10-14 14:39:27,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:39:27,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:39:27,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:39:27,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:39:27,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (1/1) ... [2024-10-14 14:39:27,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:39:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:27,806 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) [2024-10-14 14:39:27,815 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 [2024-10-14 14:39:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:39:27,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:39:27,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:39:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:39:27,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:39:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:39:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:39:27,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:39:27,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:39:27,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:39:27,876 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:39:27,953 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:39:27,955 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:39:28,064 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:39:28,064 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:39:28,147 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:39:28,148 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 14:39:28,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:39:28 BoogieIcfgContainer [2024-10-14 14:39:28,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:39:28,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:39:28,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:39:28,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:39:28,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:39:27" (1/3) ... [2024-10-14 14:39:28,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f726930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:39:28, skipping insertion in model container [2024-10-14 14:39:28,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:39:27" (2/3) ... [2024-10-14 14:39:28,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f726930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:39:28, skipping insertion in model container [2024-10-14 14:39:28,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:39:28" (3/3) ... [2024-10-14 14:39:28,155 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-10-14 14:39:28,168 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:39:28,168 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:39:28,169 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:39:28,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:39:28,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-14 14:39:28,261 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-14 14:39:28,261 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:39:28,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-14 14:39:28,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-14 14:39:28,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-14 14:39:28,274 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:39:28,279 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;@12a62791, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:39:28,283 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:39:28,289 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:39:28,289 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-14 14:39:28,289 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:39:28,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:28,290 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:28,290 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:28,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1596738301, now seen corresponding path program 1 times [2024-10-14 14:39:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545236720] [2024-10-14 14:39:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:28,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545236720] [2024-10-14 14:39:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545236720] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:28,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:39:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119395930] [2024-10-14 14:39:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:28,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:39:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:39:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:39:28,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-14 14:39:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-14 14:39:28,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:28,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-14 14:39:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:28,736 INFO L124 PetriNetUnfolderBase]: 76/157 cut-off events. [2024-10-14 14:39:28,737 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-14 14:39:28,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 157 events. 76/157 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 509 event pairs, 27 based on Foata normal form. 8/164 useless extension candidates. Maximal degree in co-relation 273. Up to 91 conditions per place. [2024-10-14 14:39:28,741 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-14 14:39:28,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 127 flow [2024-10-14 14:39:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:39:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:39:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-14 14:39:28,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-14 14:39:28,754 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 42 transitions. [2024-10-14 14:39:28,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 127 flow [2024-10-14 14:39:28,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:39:28,758 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-10-14 14:39:28,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-14 14:39:28,762 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-10-14 14:39:28,762 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-10-14 14:39:28,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-14 14:39:28,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:28,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:28,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:39:28,763 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:28,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash 832542053, now seen corresponding path program 1 times [2024-10-14 14:39:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414899980] [2024-10-14 14:39:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:28,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:28,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414899980] [2024-10-14 14:39:28,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414899980] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:28,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:28,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801264588] [2024-10-14 14:39:28,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:28,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:28,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:28,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:28,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:28,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:28,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:29,080 INFO L124 PetriNetUnfolderBase]: 138/266 cut-off events. [2024-10-14 14:39:29,080 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-14 14:39:29,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 266 events. 138/266 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1056 event pairs, 60 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 227. Up to 172 conditions per place. [2024-10-14 14:39:29,082 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 7 changer transitions 3/42 dead transitions. [2024-10-14 14:39:29,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 42 transitions, 183 flow [2024-10-14 14:39:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-14 14:39:29,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-14 14:39:29,083 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 60 transitions. [2024-10-14 14:39:29,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 42 transitions, 183 flow [2024-10-14 14:39:29,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:39:29,085 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-10-14 14:39:29,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-10-14 14:39:29,085 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-10-14 14:39:29,085 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-10-14 14:39:29,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:29,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:29,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:29,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:39:29,086 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:29,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -558101359, now seen corresponding path program 2 times [2024-10-14 14:39:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711398262] [2024-10-14 14:39:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711398262] [2024-10-14 14:39:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711398262] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:29,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:29,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:39:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153794807] [2024-10-14 14:39:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:29,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:39:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:39:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:39:29,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:29,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-14 14:39:29,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:29,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:29,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:29,326 INFO L124 PetriNetUnfolderBase]: 158/300 cut-off events. [2024-10-14 14:39:29,326 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-10-14 14:39:29,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 300 events. 158/300 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1220 event pairs, 4 based on Foata normal form. 9/307 useless extension candidates. Maximal degree in co-relation 387. Up to 124 conditions per place. [2024-10-14 14:39:29,332 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2024-10-14 14:39:29,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 62 transitions, 350 flow [2024-10-14 14:39:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:39:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:39:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-10-14 14:39:29,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-14 14:39:29,335 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 84 transitions. [2024-10-14 14:39:29,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 62 transitions, 350 flow [2024-10-14 14:39:29,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:29,340 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 212 flow [2024-10-14 14:39:29,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-14 14:39:29,341 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-14 14:39:29,342 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 212 flow [2024-10-14 14:39:29,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-14 14:39:29,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:29,342 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:29,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:39:29,343 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:29,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 579789325, now seen corresponding path program 3 times [2024-10-14 14:39:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674306274] [2024-10-14 14:39:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674306274] [2024-10-14 14:39:29,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674306274] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:29,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:29,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:29,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130401781] [2024-10-14 14:39:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:29,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:29,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:29,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:29,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:29,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:29,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:29,554 INFO L124 PetriNetUnfolderBase]: 207/392 cut-off events. [2024-10-14 14:39:29,554 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-14 14:39:29,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 392 events. 207/392 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1557 event pairs, 65 based on Foata normal form. 6/393 useless extension candidates. Maximal degree in co-relation 947. Up to 168 conditions per place. [2024-10-14 14:39:29,560 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 41 selfloop transitions, 10 changer transitions 2/56 dead transitions. [2024-10-14 14:39:29,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 431 flow [2024-10-14 14:39:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-10-14 14:39:29,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-14 14:39:29,562 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 212 flow. Second operand 5 states and 57 transitions. [2024-10-14 14:39:29,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 431 flow [2024-10-14 14:39:29,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:29,568 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 268 flow [2024-10-14 14:39:29,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-10-14 14:39:29,570 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-10-14 14:39:29,570 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 268 flow [2024-10-14 14:39:29,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:29,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:29,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:29,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:39:29,570 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:29,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1175860589, now seen corresponding path program 4 times [2024-10-14 14:39:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232137979] [2024-10-14 14:39:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232137979] [2024-10-14 14:39:29,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232137979] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377760878] [2024-10-14 14:39:29,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:29,695 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) [2024-10-14 14:39:29,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:39:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:29,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:39:29,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:29,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377760878] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:29,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:29,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-10-14 14:39:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455847908] [2024-10-14 14:39:29,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:29,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:39:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:39:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:39:29,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:29,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2024-10-14 14:39:29,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:29,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:29,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:30,058 INFO L124 PetriNetUnfolderBase]: 302/564 cut-off events. [2024-10-14 14:39:30,059 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-10-14 14:39:30,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 564 events. 302/564 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2598 event pairs, 33 based on Foata normal form. 9/565 useless extension candidates. Maximal degree in co-relation 1549. Up to 155 conditions per place. [2024-10-14 14:39:30,063 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 48 selfloop transitions, 35 changer transitions 2/88 dead transitions. [2024-10-14 14:39:30,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 739 flow [2024-10-14 14:39:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:39:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:39:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-10-14 14:39:30,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-14 14:39:30,065 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 268 flow. Second operand 10 states and 114 transitions. [2024-10-14 14:39:30,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 739 flow [2024-10-14 14:39:30,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 715 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-14 14:39:30,073 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 520 flow [2024-10-14 14:39:30,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=520, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-10-14 14:39:30,073 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2024-10-14 14:39:30,073 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 520 flow [2024-10-14 14:39:30,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2024-10-14 14:39:30,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:30,074 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:30,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:39:30,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:30,280 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:30,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2014856815, now seen corresponding path program 5 times [2024-10-14 14:39:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060863948] [2024-10-14 14:39:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060863948] [2024-10-14 14:39:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060863948] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:39:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991002421] [2024-10-14 14:39:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:30,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:39:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:39:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:39:30,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:30,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:30,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:30,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:30,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:30,443 INFO L124 PetriNetUnfolderBase]: 304/565 cut-off events. [2024-10-14 14:39:30,443 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2024-10-14 14:39:30,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 565 events. 304/565 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2521 event pairs, 89 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 2023. Up to 294 conditions per place. [2024-10-14 14:39:30,449 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-10-14 14:39:30,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 791 flow [2024-10-14 14:39:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:39:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:39:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-14 14:39:30,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-14 14:39:30,451 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 520 flow. Second operand 5 states and 58 transitions. [2024-10-14 14:39:30,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 791 flow [2024-10-14 14:39:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 711 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:30,459 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 553 flow [2024-10-14 14:39:30,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=553, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-14 14:39:30,462 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 38 predicate places. [2024-10-14 14:39:30,462 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 553 flow [2024-10-14 14:39:30,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2024-10-14 14:39:30,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:30,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:30,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:39:30,463 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:30,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 311973905, now seen corresponding path program 6 times [2024-10-14 14:39:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:30,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771948641] [2024-10-14 14:39:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:30,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771948641] [2024-10-14 14:39:30,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771948641] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:39:30,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:39:30,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:39:30,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931844097] [2024-10-14 14:39:30,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:39:30,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:39:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:39:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:39:30,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:30,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-14 14:39:30,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:30,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:30,667 INFO L124 PetriNetUnfolderBase]: 302/558 cut-off events. [2024-10-14 14:39:30,667 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2024-10-14 14:39:30,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 558 events. 302/558 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2423 event pairs, 86 based on Foata normal form. 7/560 useless extension candidates. Maximal degree in co-relation 2057. Up to 275 conditions per place. [2024-10-14 14:39:30,671 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 26 changer transitions 0/74 dead transitions. [2024-10-14 14:39:30,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 784 flow [2024-10-14 14:39:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:39:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:39:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-10-14 14:39:30,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-14 14:39:30,672 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 553 flow. Second operand 6 states and 67 transitions. [2024-10-14 14:39:30,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 784 flow [2024-10-14 14:39:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 738 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-10-14 14:39:30,677 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 583 flow [2024-10-14 14:39:30,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-10-14 14:39:30,678 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 39 predicate places. [2024-10-14 14:39:30,678 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 583 flow [2024-10-14 14:39:30,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-10-14 14:39:30,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:30,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:30,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:39:30,679 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:30,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1400090670, now seen corresponding path program 1 times [2024-10-14 14:39:30,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:30,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294503189] [2024-10-14 14:39:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:30,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294503189] [2024-10-14 14:39:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294503189] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206040888] [2024-10-14 14:39:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:30,753 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) [2024-10-14 14:39:30,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:39:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:30,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 14:39:30,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:39:30,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:39:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206040888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:30,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-10-14 14:39:30,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421971640] [2024-10-14 14:39:30,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:30,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:39:30,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:39:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:39:30,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-14 14:39:30,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 583 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-10-14 14:39:30,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:30,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-14 14:39:30,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:31,015 INFO L124 PetriNetUnfolderBase]: 460/908 cut-off events. [2024-10-14 14:39:31,015 INFO L125 PetriNetUnfolderBase]: For 4604/4649 co-relation queries the response was YES. [2024-10-14 14:39:31,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 908 events. 460/908 cut-off events. For 4604/4649 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4677 event pairs, 76 based on Foata normal form. 18/921 useless extension candidates. Maximal degree in co-relation 2392. Up to 362 conditions per place. [2024-10-14 14:39:31,022 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 72 selfloop transitions, 5 changer transitions 6/100 dead transitions. [2024-10-14 14:39:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 1092 flow [2024-10-14 14:39:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:39:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:39:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-14 14:39:31,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-10-14 14:39:31,023 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 583 flow. Second operand 4 states and 62 transitions. [2024-10-14 14:39:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 1092 flow [2024-10-14 14:39:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 1031 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:31,032 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 579 flow [2024-10-14 14:39:31,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=579, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-14 14:39:31,035 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-10-14 14:39:31,036 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 579 flow [2024-10-14 14:39:31,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2024-10-14 14:39:31,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:31,036 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:31,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:39:31,240 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,SelfDestructingSolverStorable7 [2024-10-14 14:39:31,241 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:31,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 617942674, now seen corresponding path program 2 times [2024-10-14 14:39:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198359335] [2024-10-14 14:39:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:31,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198359335] [2024-10-14 14:39:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198359335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:31,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565850434] [2024-10-14 14:39:31,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:31,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:31,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:31,407 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) [2024-10-14 14:39:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:39:31,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:31,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:31,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:31,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565850434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:31,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:31,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:31,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772704827] [2024-10-14 14:39:31,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:31,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:31,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:34,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 14:39:34,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:34,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 579 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:34,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:34,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:34,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:34,955 INFO L124 PetriNetUnfolderBase]: 1125/1921 cut-off events. [2024-10-14 14:39:34,955 INFO L125 PetriNetUnfolderBase]: For 9010/9036 co-relation queries the response was YES. [2024-10-14 14:39:34,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9391 conditions, 1921 events. 1125/1921 cut-off events. For 9010/9036 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9453 event pairs, 66 based on Foata normal form. 22/1941 useless extension candidates. Maximal degree in co-relation 5537. Up to 665 conditions per place. [2024-10-14 14:39:34,968 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 87 changer transitions 7/220 dead transitions. [2024-10-14 14:39:34,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 220 transitions, 2345 flow [2024-10-14 14:39:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 14:39:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 14:39:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2024-10-14 14:39:34,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 14:39:34,970 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 579 flow. Second operand 21 states and 231 transitions. [2024-10-14 14:39:34,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 220 transitions, 2345 flow [2024-10-14 14:39:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 220 transitions, 2313 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-14 14:39:34,979 INFO L231 Difference]: Finished difference. Result has 94 places, 126 transitions, 1475 flow [2024-10-14 14:39:34,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1475, PETRI_PLACES=94, PETRI_TRANSITIONS=126} [2024-10-14 14:39:34,980 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 70 predicate places. [2024-10-14 14:39:34,980 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 126 transitions, 1475 flow [2024-10-14 14:39:34,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:34,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:34,980 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:34,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:35,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:35,185 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:35,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash -754753068, now seen corresponding path program 3 times [2024-10-14 14:39:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566961501] [2024-10-14 14:39:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:35,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566961501] [2024-10-14 14:39:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566961501] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420278155] [2024-10-14 14:39:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:35,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:35,303 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) [2024-10-14 14:39:35,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:39:35,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:39:35,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:35,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:35,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:35,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420278155] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:35,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:35,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:35,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772607634] [2024-10-14 14:39:35,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:35,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:35,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:35,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:35,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 1475 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-14 14:39:35,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:35,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:35,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:35,903 INFO L124 PetriNetUnfolderBase]: 1223/2101 cut-off events. [2024-10-14 14:39:35,903 INFO L125 PetriNetUnfolderBase]: For 22664/22700 co-relation queries the response was YES. [2024-10-14 14:39:35,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12519 conditions, 2101 events. 1223/2101 cut-off events. For 22664/22700 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10797 event pairs, 171 based on Foata normal form. 28/2121 useless extension candidates. Maximal degree in co-relation 8237. Up to 898 conditions per place. [2024-10-14 14:39:35,919 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 123 selfloop transitions, 75 changer transitions 11/214 dead transitions. [2024-10-14 14:39:35,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 214 transitions, 2841 flow [2024-10-14 14:39:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:39:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:39:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-10-14 14:39:35,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-14 14:39:35,921 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 1475 flow. Second operand 15 states and 155 transitions. [2024-10-14 14:39:35,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 214 transitions, 2841 flow [2024-10-14 14:39:35,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 214 transitions, 2499 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:35,947 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1827 flow [2024-10-14 14:39:35,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1827, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-10-14 14:39:35,947 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 91 predicate places. [2024-10-14 14:39:35,947 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1827 flow [2024-10-14 14:39:35,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-14 14:39:35,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:35,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:35,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:39:36,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:36,153 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:36,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash 346791640, now seen corresponding path program 4 times [2024-10-14 14:39:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054469171] [2024-10-14 14:39:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054469171] [2024-10-14 14:39:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054469171] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845853738] [2024-10-14 14:39:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:36,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:36,257 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) [2024-10-14 14:39:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:39:36,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:36,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:36,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:36,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:36,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845853738] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:36,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:36,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-14 14:39:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547661858] [2024-10-14 14:39:36,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:36,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:39:36,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:39:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:39:36,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:36,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1827 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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) [2024-10-14 14:39:36,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:36,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:37,498 INFO L124 PetriNetUnfolderBase]: 1662/2815 cut-off events. [2024-10-14 14:39:37,498 INFO L125 PetriNetUnfolderBase]: For 29389/29421 co-relation queries the response was YES. [2024-10-14 14:39:37,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 2815 events. 1662/2815 cut-off events. For 29389/29421 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15024 event pairs, 37 based on Foata normal form. 70/2869 useless extension candidates. Maximal degree in co-relation 16142. Up to 899 conditions per place. [2024-10-14 14:39:37,525 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 127 selfloop transitions, 234 changer transitions 3/369 dead transitions. [2024-10-14 14:39:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 369 transitions, 4845 flow [2024-10-14 14:39:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 14:39:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 14:39:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 228 transitions. [2024-10-14 14:39:37,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-10-14 14:39:37,528 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1827 flow. Second operand 23 states and 228 transitions. [2024-10-14 14:39:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 369 transitions, 4845 flow [2024-10-14 14:39:37,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 369 transitions, 4706 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:37,581 INFO L231 Difference]: Finished difference. Result has 143 places, 286 transitions, 4253 flow [2024-10-14 14:39:37,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4253, PETRI_PLACES=143, PETRI_TRANSITIONS=286} [2024-10-14 14:39:37,584 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 119 predicate places. [2024-10-14 14:39:37,584 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 286 transitions, 4253 flow [2024-10-14 14:39:37,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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) [2024-10-14 14:39:37,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:37,584 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:37,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:39:37,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-14 14:39:37,786 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:37,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1026085048, now seen corresponding path program 5 times [2024-10-14 14:39:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567398388] [2024-10-14 14:39:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:37,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:37,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567398388] [2024-10-14 14:39:37,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567398388] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:37,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212565867] [2024-10-14 14:39:37,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:39:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:37,915 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) [2024-10-14 14:39:37,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:39:37,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:37,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 14:39:37,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:38,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:38,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212565867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:38,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:38,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-14 14:39:38,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941430110] [2024-10-14 14:39:38,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:38,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:39:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:39:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:39:38,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:38,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 286 transitions, 4253 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-10-14 14:39:38,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:38,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:39,641 INFO L124 PetriNetUnfolderBase]: 2330/4008 cut-off events. [2024-10-14 14:39:39,641 INFO L125 PetriNetUnfolderBase]: For 49556/49602 co-relation queries the response was YES. [2024-10-14 14:39:39,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26609 conditions, 4008 events. 2330/4008 cut-off events. For 49556/49602 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23531 event pairs, 87 based on Foata normal form. 142/4130 useless extension candidates. Maximal degree in co-relation 26193. Up to 1248 conditions per place. [2024-10-14 14:39:39,765 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 156 selfloop transitions, 412 changer transitions 7/580 dead transitions. [2024-10-14 14:39:39,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 580 transitions, 9060 flow [2024-10-14 14:39:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-14 14:39:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-14 14:39:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 342 transitions. [2024-10-14 14:39:39,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4201474201474201 [2024-10-14 14:39:39,767 INFO L175 Difference]: Start difference. First operand has 143 places, 286 transitions, 4253 flow. Second operand 37 states and 342 transitions. [2024-10-14 14:39:39,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 580 transitions, 9060 flow [2024-10-14 14:39:39,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 580 transitions, 7807 flow, removed 547 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:39,907 INFO L231 Difference]: Finished difference. Result has 193 places, 457 transitions, 7343 flow [2024-10-14 14:39:39,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7343, PETRI_PLACES=193, PETRI_TRANSITIONS=457} [2024-10-14 14:39:39,908 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 169 predicate places. [2024-10-14 14:39:39,908 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 457 transitions, 7343 flow [2024-10-14 14:39:39,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-10-14 14:39:39,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:39,909 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:39,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:39:40,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:40,113 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:40,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1591637122, now seen corresponding path program 6 times [2024-10-14 14:39:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:40,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799841128] [2024-10-14 14:39:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:40,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:40,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799841128] [2024-10-14 14:39:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799841128] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349731393] [2024-10-14 14:39:40,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:39:40,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:40,200 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) [2024-10-14 14:39:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:39:40,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-14 14:39:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:40,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:40,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:40,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349731393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:40,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-14 14:39:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71566247] [2024-10-14 14:39:40,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:40,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 14:39:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 14:39:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-14 14:39:40,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:40,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 457 transitions, 7343 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-10-14 14:39:40,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:40,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:41,753 INFO L124 PetriNetUnfolderBase]: 2879/4991 cut-off events. [2024-10-14 14:39:41,753 INFO L125 PetriNetUnfolderBase]: For 63005/63057 co-relation queries the response was YES. [2024-10-14 14:39:41,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34008 conditions, 4991 events. 2879/4991 cut-off events. For 63005/63057 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30727 event pairs, 110 based on Foata normal form. 66/5017 useless extension candidates. Maximal degree in co-relation 32941. Up to 957 conditions per place. [2024-10-14 14:39:41,800 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 184 selfloop transitions, 509 changer transitions 5/703 dead transitions. [2024-10-14 14:39:41,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 703 transitions, 11923 flow [2024-10-14 14:39:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 14:39:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-14 14:39:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 327 transitions. [2024-10-14 14:39:41,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-10-14 14:39:41,803 INFO L175 Difference]: Start difference. First operand has 193 places, 457 transitions, 7343 flow. Second operand 33 states and 327 transitions. [2024-10-14 14:39:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 703 transitions, 11923 flow [2024-10-14 14:39:42,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 703 transitions, 10902 flow, removed 309 selfloop flow, removed 8 redundant places. [2024-10-14 14:39:42,269 INFO L231 Difference]: Finished difference. Result has 225 places, 595 transitions, 10155 flow [2024-10-14 14:39:42,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10155, PETRI_PLACES=225, PETRI_TRANSITIONS=595} [2024-10-14 14:39:42,269 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2024-10-14 14:39:42,270 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 595 transitions, 10155 flow [2024-10-14 14:39:42,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-10-14 14:39:42,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:42,270 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:42,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:39:42,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:42,471 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:42,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1325954112, now seen corresponding path program 7 times [2024-10-14 14:39:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565217536] [2024-10-14 14:39:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565217536] [2024-10-14 14:39:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565217536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506140677] [2024-10-14 14:39:42,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:39:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:42,561 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) [2024-10-14 14:39:42,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:39:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:42,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:42,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:42,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506140677] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:42,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:42,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-14 14:39:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186151788] [2024-10-14 14:39:42,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:42,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 14:39:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 14:39:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-14 14:39:42,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:42,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 595 transitions, 10155 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:42,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:42,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:42,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:44,197 INFO L124 PetriNetUnfolderBase]: 3233/5574 cut-off events. [2024-10-14 14:39:44,198 INFO L125 PetriNetUnfolderBase]: For 77004/77058 co-relation queries the response was YES. [2024-10-14 14:39:44,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39625 conditions, 5574 events. 3233/5574 cut-off events. For 77004/77058 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34084 event pairs, 227 based on Foata normal form. 40/5576 useless extension candidates. Maximal degree in co-relation 39117. Up to 1116 conditions per place. [2024-10-14 14:39:44,255 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 237 selfloop transitions, 507 changer transitions 3/752 dead transitions. [2024-10-14 14:39:44,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 752 transitions, 13796 flow [2024-10-14 14:39:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 14:39:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 14:39:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 250 transitions. [2024-10-14 14:39:44,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49407114624505927 [2024-10-14 14:39:44,257 INFO L175 Difference]: Start difference. First operand has 225 places, 595 transitions, 10155 flow. Second operand 23 states and 250 transitions. [2024-10-14 14:39:44,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 752 transitions, 13796 flow [2024-10-14 14:39:44,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 752 transitions, 13518 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-10-14 14:39:44,862 INFO L231 Difference]: Finished difference. Result has 245 places, 660 transitions, 12460 flow [2024-10-14 14:39:44,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12460, PETRI_PLACES=245, PETRI_TRANSITIONS=660} [2024-10-14 14:39:44,863 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 221 predicate places. [2024-10-14 14:39:44,863 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 660 transitions, 12460 flow [2024-10-14 14:39:44,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:44,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:44,864 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:44,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:39:45,067 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,SelfDestructingSolverStorable13 [2024-10-14 14:39:45,068 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:45,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash -60427610, now seen corresponding path program 8 times [2024-10-14 14:39:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:45,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569505421] [2024-10-14 14:39:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569505421] [2024-10-14 14:39:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569505421] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830498102] [2024-10-14 14:39:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:45,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:45,165 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) [2024-10-14 14:39:45,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:39:45,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:45,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:45,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830498102] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:45,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-14 14:39:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132863017] [2024-10-14 14:39:45,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:45,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:39:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:39:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:39:45,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:45,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 660 transitions, 12460 flow. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 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) [2024-10-14 14:39:45,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:45,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:45,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:47,099 INFO L124 PetriNetUnfolderBase]: 4095/7043 cut-off events. [2024-10-14 14:39:47,100 INFO L125 PetriNetUnfolderBase]: For 117761/117825 co-relation queries the response was YES. [2024-10-14 14:39:47,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53687 conditions, 7043 events. 4095/7043 cut-off events. For 117761/117825 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 44957 event pairs, 297 based on Foata normal form. 82/7059 useless extension candidates. Maximal degree in co-relation 52822. Up to 1329 conditions per place. [2024-10-14 14:39:47,174 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 242 selfloop transitions, 691 changer transitions 9/947 dead transitions. [2024-10-14 14:39:47,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 947 transitions, 19101 flow [2024-10-14 14:39:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:39:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:39:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 278 transitions. [2024-10-14 14:39:47,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-10-14 14:39:47,176 INFO L175 Difference]: Start difference. First operand has 245 places, 660 transitions, 12460 flow. Second operand 28 states and 278 transitions. [2024-10-14 14:39:47,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 947 transitions, 19101 flow [2024-10-14 14:39:48,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 947 transitions, 18582 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-10-14 14:39:48,398 INFO L231 Difference]: Finished difference. Result has 275 places, 865 transitions, 18660 flow [2024-10-14 14:39:48,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12055, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18660, PETRI_PLACES=275, PETRI_TRANSITIONS=865} [2024-10-14 14:39:48,400 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 251 predicate places. [2024-10-14 14:39:48,400 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 865 transitions, 18660 flow [2024-10-14 14:39:48,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 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) [2024-10-14 14:39:48,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:48,401 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:48,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:48,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:39:48,602 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:48,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:48,603 INFO L85 PathProgramCache]: Analyzing trace with hash -248406802, now seen corresponding path program 9 times [2024-10-14 14:39:48,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:48,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578814083] [2024-10-14 14:39:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578814083] [2024-10-14 14:39:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578814083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989496746] [2024-10-14 14:39:48,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:48,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:48,745 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) [2024-10-14 14:39:48,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:39:48,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:39:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:48,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:48,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:48,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989496746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:48,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323007968] [2024-10-14 14:39:48,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:48,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:48,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:48,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:48,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 865 transitions, 18660 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-14 14:39:48,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:48,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:48,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:50,907 INFO L124 PetriNetUnfolderBase]: 4066/7007 cut-off events. [2024-10-14 14:39:50,908 INFO L125 PetriNetUnfolderBase]: For 142227/142287 co-relation queries the response was YES. [2024-10-14 14:39:50,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58388 conditions, 7007 events. 4066/7007 cut-off events. For 142227/142287 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 45100 event pairs, 626 based on Foata normal form. 40/6969 useless extension candidates. Maximal degree in co-relation 57566. Up to 2819 conditions per place. [2024-10-14 14:39:50,966 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 398 selfloop transitions, 501 changer transitions 3/907 dead transitions. [2024-10-14 14:39:50,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 907 transitions, 20775 flow [2024-10-14 14:39:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:39:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:39:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-10-14 14:39:50,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-14 14:39:50,968 INFO L175 Difference]: Start difference. First operand has 275 places, 865 transitions, 18660 flow. Second operand 14 states and 147 transitions. [2024-10-14 14:39:50,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 907 transitions, 20775 flow [2024-10-14 14:39:52,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 907 transitions, 19966 flow, removed 202 selfloop flow, removed 9 redundant places. [2024-10-14 14:39:52,277 INFO L231 Difference]: Finished difference. Result has 280 places, 865 transitions, 18876 flow [2024-10-14 14:39:52,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=17814, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18876, PETRI_PLACES=280, PETRI_TRANSITIONS=865} [2024-10-14 14:39:52,277 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 256 predicate places. [2024-10-14 14:39:52,278 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 865 transitions, 18876 flow [2024-10-14 14:39:52,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-10-14 14:39:52,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:52,278 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:52,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 14:39:52,478 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,SelfDestructingSolverStorable15 [2024-10-14 14:39:52,479 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:52,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1083488188, now seen corresponding path program 10 times [2024-10-14 14:39:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:52,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240477599] [2024-10-14 14:39:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:52,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:52,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240477599] [2024-10-14 14:39:52,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240477599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:52,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311292255] [2024-10-14 14:39:52,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:39:52,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:52,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:52,566 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) [2024-10-14 14:39:52,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:39:52,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:39:52,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:52,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:52,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:52,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311292255] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:52,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:52,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:39:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704547493] [2024-10-14 14:39:52,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:52,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:39:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:39:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:39:52,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:52,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 865 transitions, 18876 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:52,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:52,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:52,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:55,765 INFO L124 PetriNetUnfolderBase]: 4901/8548 cut-off events. [2024-10-14 14:39:55,766 INFO L125 PetriNetUnfolderBase]: For 173291/173355 co-relation queries the response was YES. [2024-10-14 14:39:55,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 8548 events. 4901/8548 cut-off events. For 173291/173355 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 57511 event pairs, 385 based on Foata normal form. 123/8575 useless extension candidates. Maximal degree in co-relation 69875. Up to 1782 conditions per place. [2024-10-14 14:39:55,839 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 395 selfloop transitions, 843 changer transitions 1/1244 dead transitions. [2024-10-14 14:39:55,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1244 transitions, 28054 flow [2024-10-14 14:39:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-14 14:39:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-14 14:39:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 422 transitions. [2024-10-14 14:39:55,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-10-14 14:39:55,841 INFO L175 Difference]: Start difference. First operand has 280 places, 865 transitions, 18876 flow. Second operand 43 states and 422 transitions. [2024-10-14 14:39:55,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1244 transitions, 28054 flow [2024-10-14 14:39:57,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1244 transitions, 27128 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-10-14 14:39:57,352 INFO L231 Difference]: Finished difference. Result has 326 places, 1091 transitions, 26431 flow [2024-10-14 14:39:57,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18083, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26431, PETRI_PLACES=326, PETRI_TRANSITIONS=1091} [2024-10-14 14:39:57,353 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 302 predicate places. [2024-10-14 14:39:57,353 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 1091 transitions, 26431 flow [2024-10-14 14:39:57,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:57,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:57,353 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:57,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:39:57,554 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,SelfDestructingSolverStorable16 [2024-10-14 14:39:57,558 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:39:57,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1668580498, now seen corresponding path program 11 times [2024-10-14 14:39:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398676450] [2024-10-14 14:39:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398676450] [2024-10-14 14:39:57,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398676450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991317512] [2024-10-14 14:39:57,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:39:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:57,696 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) [2024-10-14 14:39:57,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:39:57,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:57,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:57,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:39:57,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:57,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:39:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991317512] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:57,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:57,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-14 14:39:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738296065] [2024-10-14 14:39:57,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:57,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:39:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:39:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:39:57,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:39:57,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1091 transitions, 26431 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-10-14 14:39:57,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:57,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:39:57,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:00,496 INFO L124 PetriNetUnfolderBase]: 4961/8664 cut-off events. [2024-10-14 14:40:00,497 INFO L125 PetriNetUnfolderBase]: For 210186/210256 co-relation queries the response was YES. [2024-10-14 14:40:00,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77783 conditions, 8664 events. 4961/8664 cut-off events. For 210186/210256 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 58580 event pairs, 1714 based on Foata normal form. 48/8621 useless extension candidates. Maximal degree in co-relation 76564. Up to 6637 conditions per place. [2024-10-14 14:40:00,699 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 981 selfloop transitions, 177 changer transitions 4/1167 dead transitions. [2024-10-14 14:40:00,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1167 transitions, 30031 flow [2024-10-14 14:40:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:40:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:40:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-10-14 14:40:00,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-14 14:40:00,700 INFO L175 Difference]: Start difference. First operand has 326 places, 1091 transitions, 26431 flow. Second operand 12 states and 114 transitions. [2024-10-14 14:40:00,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1167 transitions, 30031 flow [2024-10-14 14:40:03,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1167 transitions, 29639 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-10-14 14:40:03,103 INFO L231 Difference]: Finished difference. Result has 331 places, 1117 transitions, 27278 flow [2024-10-14 14:40:03,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26047, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27278, PETRI_PLACES=331, PETRI_TRANSITIONS=1117} [2024-10-14 14:40:03,105 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 307 predicate places. [2024-10-14 14:40:03,105 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1117 transitions, 27278 flow [2024-10-14 14:40:03,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-10-14 14:40:03,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:40:03,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:40:03,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 14:40:03,309 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,SelfDestructingSolverStorable17 [2024-10-14 14:40:03,310 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:40:03,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:40:03,310 INFO L85 PathProgramCache]: Analyzing trace with hash -386093682, now seen corresponding path program 12 times [2024-10-14 14:40:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:40:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690692650] [2024-10-14 14:40:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:40:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:40:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:40:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690692650] [2024-10-14 14:40:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690692650] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:40:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948824599] [2024-10-14 14:40:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:40:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:40:03,450 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) [2024-10-14 14:40:03,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:40:03,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-14 14:40:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:40:03,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:40:03,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:40:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:03,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:40:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948824599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:40:03,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:40:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-14 14:40:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873047500] [2024-10-14 14:40:03,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:40:03,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:40:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:40:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:40:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:40:03,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:40:03,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1117 transitions, 27278 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-10-14 14:40:03,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:40:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:40:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:09,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 14:40:12,216 INFO L124 PetriNetUnfolderBase]: 6505/11382 cut-off events. [2024-10-14 14:40:12,217 INFO L125 PetriNetUnfolderBase]: For 289095/289187 co-relation queries the response was YES. [2024-10-14 14:40:12,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103184 conditions, 11382 events. 6505/11382 cut-off events. For 289095/289187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 80661 event pairs, 943 based on Foata normal form. 156/11423 useless extension candidates. Maximal degree in co-relation 102060. Up to 3724 conditions per place. [2024-10-14 14:40:12,347 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 880 selfloop transitions, 771 changer transitions 2/1658 dead transitions. [2024-10-14 14:40:12,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1658 transitions, 42134 flow [2024-10-14 14:40:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-14 14:40:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-14 14:40:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 381 transitions. [2024-10-14 14:40:12,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4557416267942584 [2024-10-14 14:40:12,349 INFO L175 Difference]: Start difference. First operand has 331 places, 1117 transitions, 27278 flow. Second operand 38 states and 381 transitions. [2024-10-14 14:40:12,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1658 transitions, 42134 flow [2024-10-14 14:40:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1658 transitions, 41941 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-10-14 14:40:16,964 INFO L231 Difference]: Finished difference. Result has 377 places, 1421 transitions, 37939 flow [2024-10-14 14:40:16,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27003, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37939, PETRI_PLACES=377, PETRI_TRANSITIONS=1421} [2024-10-14 14:40:16,965 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 353 predicate places. [2024-10-14 14:40:16,966 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1421 transitions, 37939 flow [2024-10-14 14:40:16,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-10-14 14:40:16,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:40:16,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:40:16,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 14:40:17,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:17,167 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:40:17,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:40:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1833216398, now seen corresponding path program 13 times [2024-10-14 14:40:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:40:17,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089354057] [2024-10-14 14:40:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:40:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:40:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:40:17,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089354057] [2024-10-14 14:40:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089354057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:40:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642304206] [2024-10-14 14:40:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:40:17,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:17,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:40:17,262 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) [2024-10-14 14:40:17,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:40:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:17,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:40:17,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:40:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:17,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:40:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:17,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642304206] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:40:17,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:40:17,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:40:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668406549] [2024-10-14 14:40:17,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:40:17,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:40:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:40:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:40:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:40:17,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:40:17,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1421 transitions, 37939 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:40:17,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:40:17,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:40:17,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:23,785 INFO L124 PetriNetUnfolderBase]: 7166/12498 cut-off events. [2024-10-14 14:40:23,786 INFO L125 PetriNetUnfolderBase]: For 375773/375875 co-relation queries the response was YES. [2024-10-14 14:40:23,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121490 conditions, 12498 events. 7166/12498 cut-off events. For 375773/375875 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 89975 event pairs, 941 based on Foata normal form. 97/12470 useless extension candidates. Maximal degree in co-relation 120461. Up to 4745 conditions per place. [2024-10-14 14:40:23,954 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 650 selfloop transitions, 971 changer transitions 7/1633 dead transitions. [2024-10-14 14:40:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1633 transitions, 45894 flow [2024-10-14 14:40:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 14:40:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-14 14:40:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 202 transitions. [2024-10-14 14:40:23,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-10-14 14:40:23,955 INFO L175 Difference]: Start difference. First operand has 377 places, 1421 transitions, 37939 flow. Second operand 20 states and 202 transitions. [2024-10-14 14:40:23,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1633 transitions, 45894 flow [2024-10-14 14:40:29,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1633 transitions, 45283 flow, removed 233 selfloop flow, removed 5 redundant places. [2024-10-14 14:40:29,944 INFO L231 Difference]: Finished difference. Result has 399 places, 1566 transitions, 44651 flow [2024-10-14 14:40:29,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=37286, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=44651, PETRI_PLACES=399, PETRI_TRANSITIONS=1566} [2024-10-14 14:40:29,945 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 375 predicate places. [2024-10-14 14:40:29,946 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 1566 transitions, 44651 flow [2024-10-14 14:40:29,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:40:29,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:40:29,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:40:29,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 14:40:30,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:30,147 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:40:30,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:40:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash 771047482, now seen corresponding path program 14 times [2024-10-14 14:40:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:40:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312227470] [2024-10-14 14:40:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:40:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:40:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:40:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312227470] [2024-10-14 14:40:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312227470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:40:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708990729] [2024-10-14 14:40:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:40:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:40:30,225 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) [2024-10-14 14:40:30,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:40:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:40:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:40:30,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:40:30,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:40:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:30,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:40:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:30,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708990729] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:40:30,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:40:30,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:40:30,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322081079] [2024-10-14 14:40:30,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:40:30,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:40:30,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:40:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:40:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:40:30,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:40:30,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1566 transitions, 44651 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-14 14:40:30,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:40:30,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:40:30,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:37,129 INFO L124 PetriNetUnfolderBase]: 8959/15472 cut-off events. [2024-10-14 14:40:37,129 INFO L125 PetriNetUnfolderBase]: For 547552/547690 co-relation queries the response was YES. [2024-10-14 14:40:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158929 conditions, 15472 events. 8959/15472 cut-off events. For 547552/547690 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 113378 event pairs, 2139 based on Foata normal form. 86/15425 useless extension candidates. Maximal degree in co-relation 157773. Up to 9119 conditions per place. [2024-10-14 14:40:37,310 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 1182 selfloop transitions, 857 changer transitions 0/2044 dead transitions. [2024-10-14 14:40:37,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2044 transitions, 61439 flow [2024-10-14 14:40:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 14:40:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-14 14:40:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 207 transitions. [2024-10-14 14:40:37,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-10-14 14:40:37,311 INFO L175 Difference]: Start difference. First operand has 399 places, 1566 transitions, 44651 flow. Second operand 20 states and 207 transitions. [2024-10-14 14:40:37,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2044 transitions, 61439 flow [2024-10-14 14:40:45,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2044 transitions, 60958 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-10-14 14:40:45,244 INFO L231 Difference]: Finished difference. Result has 419 places, 1952 transitions, 58546 flow [2024-10-14 14:40:45,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=44190, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=58546, PETRI_PLACES=419, PETRI_TRANSITIONS=1952} [2024-10-14 14:40:45,246 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 395 predicate places. [2024-10-14 14:40:45,246 INFO L471 AbstractCegarLoop]: Abstraction has has 419 places, 1952 transitions, 58546 flow [2024-10-14 14:40:45,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-14 14:40:45,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:40:45,246 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:40:45,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:40:45,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:45,451 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:40:45,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:40:45,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1312145248, now seen corresponding path program 15 times [2024-10-14 14:40:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:40:45,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776648578] [2024-10-14 14:40:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:40:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:40:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:40:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:40:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776648578] [2024-10-14 14:40:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776648578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:40:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524059539] [2024-10-14 14:40:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:40:45,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:40:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:40:45,546 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) [2024-10-14 14:40:45,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:40:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:40:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:40:45,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:40:45,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:40:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:45,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:40:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:40:45,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524059539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:40:45,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:40:45,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-14 14:40:45,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101221302] [2024-10-14 14:40:45,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:40:45,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 14:40:45,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:40:45,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 14:40:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-14 14:40:45,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:40:45,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1952 transitions, 58546 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:40:45,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:40:45,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:40:45,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:40:52,907 INFO L124 PetriNetUnfolderBase]: 8950/15459 cut-off events. [2024-10-14 14:40:52,908 INFO L125 PetriNetUnfolderBase]: For 591586/591712 co-relation queries the response was YES. [2024-10-14 14:40:53,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165458 conditions, 15459 events. 8950/15459 cut-off events. For 591586/591712 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 113570 event pairs, 2463 based on Foata normal form. 76/15382 useless extension candidates. Maximal degree in co-relation 165037. Up to 10308 conditions per place. [2024-10-14 14:40:53,103 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 1390 selfloop transitions, 600 changer transitions 3/1998 dead transitions. [2024-10-14 14:40:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1998 transitions, 63123 flow [2024-10-14 14:40:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:40:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:40:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2024-10-14 14:40:53,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-14 14:40:53,104 INFO L175 Difference]: Start difference. First operand has 419 places, 1952 transitions, 58546 flow. Second operand 14 states and 140 transitions. [2024-10-14 14:40:53,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1998 transitions, 63123 flow [2024-10-14 14:41:02,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1998 transitions, 62449 flow, removed 225 selfloop flow, removed 6 redundant places. [2024-10-14 14:41:02,380 INFO L231 Difference]: Finished difference. Result has 428 places, 1953 transitions, 59138 flow [2024-10-14 14:41:02,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=57837, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=59138, PETRI_PLACES=428, PETRI_TRANSITIONS=1953} [2024-10-14 14:41:02,382 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 404 predicate places. [2024-10-14 14:41:02,382 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 1953 transitions, 59138 flow [2024-10-14 14:41:02,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:41:02,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:41:02,382 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:41:02,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 14:41:02,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-14 14:41:02,583 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:41:02,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:41:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1984276102, now seen corresponding path program 16 times [2024-10-14 14:41:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:41:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62454147] [2024-10-14 14:41:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:41:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:41:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:41:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:41:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:41:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62454147] [2024-10-14 14:41:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62454147] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:41:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269412993] [2024-10-14 14:41:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:41:02,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:41:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:41:02,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:41:02,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:41:02,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:41:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:41:02,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:41:02,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:41:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:41:02,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:41:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:41:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269412993] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:41:02,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:41:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:41:02,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678952641] [2024-10-14 14:41:02,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:41:02,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:41:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:41:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:41:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:41:02,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-14 14:41:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1953 transitions, 59138 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 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) [2024-10-14 14:41:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:41:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-14 14:41:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand