./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/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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/chl-chromosome-symm.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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:35:23,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:35:23,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:35:23,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:35:23,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:35:23,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:35:23,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:35:23,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:35:23,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:35:23,905 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:35:23,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:35:23,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:35:23,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:35:23,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:35:23,908 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:35:23,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:35:23,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:35:23,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:35:23,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:35:23,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:35:23,909 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:35:23,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:35:23,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:35:23,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:35:23,913 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:35:23,913 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:35:23,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:35:23,913 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:35:23,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:35:23,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:35:23,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:35:23,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:35:23,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:35:23,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:35:23,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:35:23,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:35:23,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:35:23,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-20 09:35:24,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:35:24,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:35:24,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:35:24,137 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:35:24,137 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:35:24,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-20 09:35:25,328 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:35:25,462 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:35:25,465 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-20 09:35:25,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35cd3428/c2e7e6a6be4c4639b66a581ee5bab716/FLAG1b5de957a [2024-11-20 09:35:25,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35cd3428/c2e7e6a6be4c4639b66a581ee5bab716 [2024-11-20 09:35:25,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:35:25,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:35:25,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:35:25,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:35:25,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:35:25,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:25" (1/1) ... [2024-11-20 09:35:25,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164bbd27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:25, skipping insertion in model container [2024-11-20 09:35:25,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:25" (1/1) ... [2024-11-20 09:35:25,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:35:26,052 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-20 09:35:26,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:35:26,068 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:35:26,083 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-20 09:35:26,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:35:26,121 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:35:26,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26 WrapperNode [2024-11-20 09:35:26,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:35:26,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:35:26,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:35:26,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:35:26,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,160 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 191 [2024-11-20 09:35:26,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:35:26,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:35:26,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:35:26,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:35:26,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,196 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-20 09:35:26,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:35:26,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:35:26,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:35:26,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:35:26,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (1/1) ... [2024-11-20 09:35:26,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:35:26,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:26,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 09:35:26,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 09:35:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:35:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:35:26,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:35:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:35:26,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:35:26,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:35:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:35:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:35:26,296 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:35:26,381 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:35:26,382 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:35:26,721 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:35:26,722 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:35:26,943 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:35:26,943 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 09:35:26,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:35:26 BoogieIcfgContainer [2024-11-20 09:35:26,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:35:26,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:35:26,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:35:26,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:35:26,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:35:25" (1/3) ... [2024-11-20 09:35:26,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b5c53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:35:26, skipping insertion in model container [2024-11-20 09:35:26,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:26" (2/3) ... [2024-11-20 09:35:26,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b5c53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:35:26, skipping insertion in model container [2024-11-20 09:35:26,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:35:26" (3/3) ... [2024-11-20 09:35:26,952 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-20 09:35:26,964 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:35:26,965 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:35:26,965 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:35:27,004 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:35:27,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-11-20 09:35:27,057 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-11-20 09:35:27,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:35:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-11-20 09:35:27,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-11-20 09:35:27,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-11-20 09:35:27,072 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:35:27,079 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;@31162101, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:35:27,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:35:27,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:35:27,088 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-11-20 09:35:27,088 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:35:27,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:27,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:27,090 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:27,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2024243091, now seen corresponding path program 1 times [2024-11-20 09:35:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:27,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22287031] [2024-11-20 09:35:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:35:27,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22287031] [2024-11-20 09:35:27,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22287031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:27,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:27,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:35:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843512319] [2024-11-20 09:35:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:27,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:35:27,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:27,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:35:27,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:35:27,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:27,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:27,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:27,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:27,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:27,587 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2024-11-20 09:35:27,588 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 09:35:27,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2024-11-20 09:35:27,591 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-11-20 09:35:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2024-11-20 09:35:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:35:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:35:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-11-20 09:35:27,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-11-20 09:35:27,601 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2024-11-20 09:35:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2024-11-20 09:35:27,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:27,605 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2024-11-20 09:35:27,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2024-11-20 09:35:27,611 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-11-20 09:35:27,612 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2024-11-20 09:35:27,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:27,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:27,613 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:27,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:35:27,613 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:27,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -637121085, now seen corresponding path program 1 times [2024-11-20 09:35:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142397701] [2024-11-20 09:35:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:27,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142397701] [2024-11-20 09:35:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142397701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732849036] [2024-11-20 09:35:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:27,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:27,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:35:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:27,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 09:35:27,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:27,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:35:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732849036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:27,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-20 09:35:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209326131] [2024-11-20 09:35:27,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:27,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:35:27,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:35:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:35:27,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:27,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:27,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:27,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:27,985 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2024-11-20 09:35:27,986 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:35:27,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2024-11-20 09:35:27,987 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2024-11-20 09:35:27,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2024-11-20 09:35:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:35:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:35:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2024-11-20 09:35:27,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-11-20 09:35:27,989 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2024-11-20 09:35:27,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2024-11-20 09:35:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:27,991 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2024-11-20 09:35:27,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-11-20 09:35:27,991 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-11-20 09:35:27,992 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2024-11-20 09:35:27,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:27,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:27,992 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:28,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:28,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:28,193 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:28,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash 320875781, now seen corresponding path program 2 times [2024-11-20 09:35:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280182762] [2024-11-20 09:35:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:35:28,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280182762] [2024-11-20 09:35:28,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280182762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435354983] [2024-11-20 09:35:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:28,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:28,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:28,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:35:28,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 09:35:28,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:28,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 09:35:28,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 09:35:28,610 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435354983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:28,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:28,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-20 09:35:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490211892] [2024-11-20 09:35:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:28,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-20 09:35:28,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:28,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:28,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:28,720 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-11-20 09:35:28,720 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:35:28,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2024-11-20 09:35:28,723 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2024-11-20 09:35:28,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2024-11-20 09:35:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-11-20 09:35:28,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-20 09:35:28,726 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2024-11-20 09:35:28,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2024-11-20 09:35:28,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:28,729 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2024-11-20 09:35:28,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-11-20 09:35:28,730 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-11-20 09:35:28,731 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2024-11-20 09:35:28,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:28,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:28,731 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:28,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:28,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-20 09:35:28,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:28,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1510976613, now seen corresponding path program 3 times [2024-11-20 09:35:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:28,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422579893] [2024-11-20 09:35:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:35:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422579893] [2024-11-20 09:35:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422579893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:29,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053446351] [2024-11-20 09:35:29,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:29,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:29,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:29,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:35:29,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-20 09:35:29,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:29,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 09:35:29,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 09:35:29,252 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:35:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053446351] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:29,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:35:29,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-20 09:35:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857192954] [2024-11-20 09:35:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:29,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:29,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:29,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-20 09:35:29,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:29,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:29,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:29,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:29,354 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2024-11-20 09:35:29,355 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-20 09:35:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 522 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2024-11-20 09:35:29,358 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-20 09:35:29,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2024-11-20 09:35:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-20 09:35:29,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:35:29,359 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2024-11-20 09:35:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2024-11-20 09:35:29,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:29,362 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2024-11-20 09:35:29,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-20 09:35:29,364 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-11-20 09:35:29,364 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2024-11-20 09:35:29,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:29,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:29,365 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:29,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:35:29,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:29,568 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:29,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2094827693, now seen corresponding path program 4 times [2024-11-20 09:35:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141539264] [2024-11-20 09:35:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:35:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141539264] [2024-11-20 09:35:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141539264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640948208] [2024-11-20 09:35:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:35:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:29,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:29,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:35:29,754 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:35:29,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:29,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:35:29,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:35:29,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:35:29,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640948208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:29,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:29,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 09:35:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606205910] [2024-11-20 09:35:29,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:29,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:35:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:35:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:35:29,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:29,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:29,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:29,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:29,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:29,936 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2024-11-20 09:35:29,937 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-20 09:35:29,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 512 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2024-11-20 09:35:29,940 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2024-11-20 09:35:29,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2024-11-20 09:35:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:35:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:35:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2024-11-20 09:35:29,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-11-20 09:35:29,942 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2024-11-20 09:35:29,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2024-11-20 09:35:29,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:29,943 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2024-11-20 09:35:29,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-11-20 09:35:29,944 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-11-20 09:35:29,944 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2024-11-20 09:35:29,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:29,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:29,945 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:29,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:30,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:30,145 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:30,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1695419871, now seen corresponding path program 5 times [2024-11-20 09:35:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:30,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652253219] [2024-11-20 09:35:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:30,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652253219] [2024-11-20 09:35:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652253219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:30,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:30,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:35:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626028901] [2024-11-20 09:35:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:30,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:35:30,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:30,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:30,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:30,440 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2024-11-20 09:35:30,440 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-20 09:35:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2024-11-20 09:35:30,442 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-20 09:35:30,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2024-11-20 09:35:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-11-20 09:35:30,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-11-20 09:35:30,445 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2024-11-20 09:35:30,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2024-11-20 09:35:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:30,448 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2024-11-20 09:35:30,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-11-20 09:35:30,450 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-11-20 09:35:30,451 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2024-11-20 09:35:30,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:30,452 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:30,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:35:30,452 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:30,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1072477483, now seen corresponding path program 6 times [2024-11-20 09:35:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974395286] [2024-11-20 09:35:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:30,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974395286] [2024-11-20 09:35:30,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974395286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:30,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:30,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:35:30,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551416876] [2024-11-20 09:35:30,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:30,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:30,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:35:30,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:30,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:30,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:30,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:30,673 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2024-11-20 09:35:30,673 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-20 09:35:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2024-11-20 09:35:30,675 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-11-20 09:35:30,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2024-11-20 09:35:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2024-11-20 09:35:30,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-20 09:35:30,678 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2024-11-20 09:35:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2024-11-20 09:35:30,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:30,680 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2024-11-20 09:35:30,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-11-20 09:35:30,683 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-11-20 09:35:30,683 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2024-11-20 09:35:30,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:30,683 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:30,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:35:30,683 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:30,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1385481324, now seen corresponding path program 1 times [2024-11-20 09:35:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:30,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97369871] [2024-11-20 09:35:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 09:35:30,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:30,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97369871] [2024-11-20 09:35:30,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97369871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:30,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:30,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:35:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120636823] [2024-11-20 09:35:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:30,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:35:30,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:30,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:30,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:30,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:30,903 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2024-11-20 09:35:30,903 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-11-20 09:35:30,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 435 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2024-11-20 09:35:30,904 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-11-20 09:35:30,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2024-11-20 09:35:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-20 09:35:30,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-20 09:35:30,906 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2024-11-20 09:35:30,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2024-11-20 09:35:30,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:30,908 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2024-11-20 09:35:30,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-11-20 09:35:30,909 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-11-20 09:35:30,909 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2024-11-20 09:35:30,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:30,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:30,911 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:30,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:35:30,911 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:30,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 134918016, now seen corresponding path program 2 times [2024-11-20 09:35:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:30,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809634662] [2024-11-20 09:35:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 09:35:31,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:31,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809634662] [2024-11-20 09:35:31,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809634662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:35:31,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:35:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:35:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570247051] [2024-11-20 09:35:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:35:31,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:35:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:35:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:35:31,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:31,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:31,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:31,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:31,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:31,166 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2024-11-20 09:35:31,166 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-11-20 09:35:31,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 27 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2024-11-20 09:35:31,167 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-11-20 09:35:31,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2024-11-20 09:35:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:35:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:35:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-20 09:35:31,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-20 09:35:31,168 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2024-11-20 09:35:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2024-11-20 09:35:31,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 09:35:31,170 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2024-11-20 09:35:31,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-11-20 09:35:31,171 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-11-20 09:35:31,171 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2024-11-20 09:35:31,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:31,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:31,171 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:31,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:35:31,171 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:31,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1888690876, now seen corresponding path program 1 times [2024-11-20 09:35:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742678124] [2024-11-20 09:35:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:32,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:32,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742678124] [2024-11-20 09:35:32,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742678124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:32,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570050404] [2024-11-20 09:35:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:32,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:32,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:32,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:35:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:32,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:35:32,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:32,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:32,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-20 09:35:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:32,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:32,688 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:32,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-11-20 09:35:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570050404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:32,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:32,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-20 09:35:32,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54933752] [2024-11-20 09:35:32,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:32,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 09:35:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 09:35:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-20 09:35:32,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:32,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:32,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:32,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:32,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:33,409 INFO L124 PetriNetUnfolderBase]: 136/255 cut-off events. [2024-11-20 09:35:33,409 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2024-11-20 09:35:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 255 events. 136/255 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 794 event pairs, 12 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 854. Up to 99 conditions per place. [2024-11-20 09:35:33,411 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 55 selfloop transitions, 21 changer transitions 12/89 dead transitions. [2024-11-20 09:35:33,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 661 flow [2024-11-20 09:35:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:35:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:35:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2024-11-20 09:35:33,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36038961038961037 [2024-11-20 09:35:33,412 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 14 states and 111 transitions. [2024-11-20 09:35:33,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 661 flow [2024-11-20 09:35:33,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 617 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-20 09:35:33,415 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 392 flow [2024-11-20 09:35:33,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=392, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-11-20 09:35:33,417 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2024-11-20 09:35:33,417 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 392 flow [2024-11-20 09:35:33,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:33,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:33,417 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:33,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:33,618 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,SelfDestructingSolverStorable9 [2024-11-20 09:35:33,618 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:33,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash 200974240, now seen corresponding path program 2 times [2024-11-20 09:35:33,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920421589] [2024-11-20 09:35:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:35:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920421589] [2024-11-20 09:35:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920421589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498117470] [2024-11-20 09:35:34,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:34,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:34,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:34,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:35:34,720 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:34,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:34,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:34,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:34,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:34,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:35:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:34,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:35,153 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:35,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498117470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:35,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 26 [2024-11-20 09:35:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102789103] [2024-11-20 09:35:35,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:35,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 09:35:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 09:35:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-20 09:35:35,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 392 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:35,775 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-11-20 09:35:35,775 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-11-20 09:35:35,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 273 events. 145/273 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 865 event pairs, 17 based on Foata normal form. 1/274 useless extension candidates. Maximal degree in co-relation 1111. Up to 198 conditions per place. [2024-11-20 09:35:35,777 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 41 selfloop transitions, 33 changer transitions 3/78 dead transitions. [2024-11-20 09:35:35,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 678 flow [2024-11-20 09:35:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 09:35:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 09:35:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 115 transitions. [2024-11-20 09:35:35,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2904040404040404 [2024-11-20 09:35:35,778 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 392 flow. Second operand 18 states and 115 transitions. [2024-11-20 09:35:35,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 678 flow [2024-11-20 09:35:35,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 611 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-11-20 09:35:35,782 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 492 flow [2024-11-20 09:35:35,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=492, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2024-11-20 09:35:35,783 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2024-11-20 09:35:35,783 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 492 flow [2024-11-20 09:35:35,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:35,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:35,783 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:35,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 09:35:35,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:35,988 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:35,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 988624800, now seen corresponding path program 3 times [2024-11-20 09:35:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049523402] [2024-11-20 09:35:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:35,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049523402] [2024-11-20 09:35:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049523402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570598600] [2024-11-20 09:35:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:36,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:35:36,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:35:36,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:36,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:36,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:36,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:36,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:35:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:36,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:37,065 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:37,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570598600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:37,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:37,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-11-20 09:35:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441435641] [2024-11-20 09:35:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:37,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:35:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:35:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:35:37,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:37,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 492 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:37,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:37,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:37,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:37,534 INFO L124 PetriNetUnfolderBase]: 159/298 cut-off events. [2024-11-20 09:35:37,534 INFO L125 PetriNetUnfolderBase]: For 951/951 co-relation queries the response was YES. [2024-11-20 09:35:37,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 298 events. 159/298 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 986 event pairs, 16 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1293. Up to 214 conditions per place. [2024-11-20 09:35:37,536 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 58 selfloop transitions, 25 changer transitions 2/86 dead transitions. [2024-11-20 09:35:37,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 86 transitions, 800 flow [2024-11-20 09:35:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:35:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:35:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 92 transitions. [2024-11-20 09:35:37,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32167832167832167 [2024-11-20 09:35:37,537 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 492 flow. Second operand 13 states and 92 transitions. [2024-11-20 09:35:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 86 transitions, 800 flow [2024-11-20 09:35:37,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 706 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-11-20 09:35:37,541 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 530 flow [2024-11-20 09:35:37,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=530, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-11-20 09:35:37,541 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2024-11-20 09:35:37,541 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 530 flow [2024-11-20 09:35:37,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:37,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:37,542 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:37,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:37,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:37,745 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:37,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash 981795176, now seen corresponding path program 4 times [2024-11-20 09:35:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:37,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896066626] [2024-11-20 09:35:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:37,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:38,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896066626] [2024-11-20 09:35:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896066626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071753299] [2024-11-20 09:35:38,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:35:38,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:38,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:38,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:35:38,316 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:35:38,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:38,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:35:38,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:38,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:38,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-20 09:35:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:38,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:38,640 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:38,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071753299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:38,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:38,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-11-20 09:35:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118927328] [2024-11-20 09:35:38,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:38,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:35:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:35:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:35:38,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:38,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 530 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:35:38,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:38,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:38,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:39,012 INFO L124 PetriNetUnfolderBase]: 161/306 cut-off events. [2024-11-20 09:35:39,012 INFO L125 PetriNetUnfolderBase]: For 1216/1216 co-relation queries the response was YES. [2024-11-20 09:35:39,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 306 events. 161/306 cut-off events. For 1216/1216 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1046 event pairs, 21 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1375. Up to 220 conditions per place. [2024-11-20 09:35:39,014 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 58 selfloop transitions, 23 changer transitions 1/83 dead transitions. [2024-11-20 09:35:39,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 83 transitions, 760 flow [2024-11-20 09:35:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 83 transitions. [2024-11-20 09:35:39,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2024-11-20 09:35:39,015 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 530 flow. Second operand 12 states and 83 transitions. [2024-11-20 09:35:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 83 transitions, 760 flow [2024-11-20 09:35:39,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 718 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-20 09:35:39,019 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 551 flow [2024-11-20 09:35:39,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=551, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2024-11-20 09:35:39,020 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2024-11-20 09:35:39,020 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 551 flow [2024-11-20 09:35:39,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:35:39,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:39,021 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:39,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 09:35:39,221 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,SelfDestructingSolverStorable12 [2024-11-20 09:35:39,222 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:39,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1505476546, now seen corresponding path program 5 times [2024-11-20 09:35:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213930474] [2024-11-20 09:35:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213930474] [2024-11-20 09:35:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213930474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98052779] [2024-11-20 09:35:39,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:39,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:39,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:39,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:39,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:35:39,860 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:35:39,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:39,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 09:35:39,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:39,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:39,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-20 09:35:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:40,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:40,253 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:40,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 102 [2024-11-20 09:35:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:40,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98052779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:40,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:40,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-11-20 09:35:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146194426] [2024-11-20 09:35:40,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:40,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 09:35:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 09:35:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-11-20 09:35:40,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:40,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 551 flow. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:40,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:40,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:40,881 INFO L124 PetriNetUnfolderBase]: 177/337 cut-off events. [2024-11-20 09:35:40,881 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2024-11-20 09:35:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 337 events. 177/337 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1206 event pairs, 20 based on Foata normal form. 6/343 useless extension candidates. Maximal degree in co-relation 1571. Up to 229 conditions per place. [2024-11-20 09:35:40,884 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 61 selfloop transitions, 29 changer transitions 7/98 dead transitions. [2024-11-20 09:35:40,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 908 flow [2024-11-20 09:35:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:35:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:35:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 105 transitions. [2024-11-20 09:35:40,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-20 09:35:40,885 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 551 flow. Second operand 14 states and 105 transitions. [2024-11-20 09:35:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 908 flow [2024-11-20 09:35:40,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 860 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-11-20 09:35:40,889 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 649 flow [2024-11-20 09:35:40,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=649, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-20 09:35:40,889 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-11-20 09:35:40,890 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 649 flow [2024-11-20 09:35:40,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:40,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:40,890 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:40,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:35:41,090 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,SelfDestructingSolverStorable13 [2024-11-20 09:35:41,091 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:41,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash -157063470, now seen corresponding path program 6 times [2024-11-20 09:35:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:41,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33951617] [2024-11-20 09:35:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:41,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33951617] [2024-11-20 09:35:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33951617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824393433] [2024-11-20 09:35:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:35:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:41,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:41,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:35:41,747 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-20 09:35:41,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:41,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:41,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:41,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:41,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:35:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:41,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:42,134 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:42,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:42,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824393433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:42,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:42,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-11-20 09:35:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490143792] [2024-11-20 09:35:42,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:42,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:35:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:35:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:35:42,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:42,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 649 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:42,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:42,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:42,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:42,633 INFO L124 PetriNetUnfolderBase]: 187/351 cut-off events. [2024-11-20 09:35:42,634 INFO L125 PetriNetUnfolderBase]: For 2557/2557 co-relation queries the response was YES. [2024-11-20 09:35:42,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 351 events. 187/351 cut-off events. For 2557/2557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1245 event pairs, 47 based on Foata normal form. 6/357 useless extension candidates. Maximal degree in co-relation 1878. Up to 250 conditions per place. [2024-11-20 09:35:42,636 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 66 selfloop transitions, 25 changer transitions 7/99 dead transitions. [2024-11-20 09:35:42,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 1052 flow [2024-11-20 09:35:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:35:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:35:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2024-11-20 09:35:42,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3146853146853147 [2024-11-20 09:35:42,637 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 649 flow. Second operand 13 states and 90 transitions. [2024-11-20 09:35:42,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 1052 flow [2024-11-20 09:35:42,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 917 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-11-20 09:35:42,643 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 660 flow [2024-11-20 09:35:42,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-11-20 09:35:42,643 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2024-11-20 09:35:42,643 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 660 flow [2024-11-20 09:35:42,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:42,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:42,643 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:42,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:42,847 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,SelfDestructingSolverStorable14 [2024-11-20 09:35:42,848 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:42,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2045394236, now seen corresponding path program 7 times [2024-11-20 09:35:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:42,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411795191] [2024-11-20 09:35:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:43,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411795191] [2024-11-20 09:35:43,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411795191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666648877] [2024-11-20 09:35:43,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:35:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:43,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:35:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:43,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:35:43,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:43,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:43,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-20 09:35:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:43,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:43,900 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:43,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-11-20 09:35:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666648877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:43,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:43,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-20 09:35:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52113104] [2024-11-20 09:35:43,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:43,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 09:35:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 09:35:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-20 09:35:43,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:43,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 660 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:43,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:43,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:44,418 INFO L124 PetriNetUnfolderBase]: 236/450 cut-off events. [2024-11-20 09:35:44,418 INFO L125 PetriNetUnfolderBase]: For 3608/3608 co-relation queries the response was YES. [2024-11-20 09:35:44,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 450 events. 236/450 cut-off events. For 3608/3608 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1810 event pairs, 32 based on Foata normal form. 5/455 useless extension candidates. Maximal degree in co-relation 2490. Up to 185 conditions per place. [2024-11-20 09:35:44,421 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 76 selfloop transitions, 33 changer transitions 11/121 dead transitions. [2024-11-20 09:35:44,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 121 transitions, 1260 flow [2024-11-20 09:35:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:35:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:35:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2024-11-20 09:35:44,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3474025974025974 [2024-11-20 09:35:44,422 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 660 flow. Second operand 14 states and 107 transitions. [2024-11-20 09:35:44,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 121 transitions, 1260 flow [2024-11-20 09:35:44,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 121 transitions, 1205 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:44,430 INFO L231 Difference]: Finished difference. Result has 104 places, 88 transitions, 865 flow [2024-11-20 09:35:44,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=865, PETRI_PLACES=104, PETRI_TRANSITIONS=88} [2024-11-20 09:35:44,430 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 82 predicate places. [2024-11-20 09:35:44,430 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 88 transitions, 865 flow [2024-11-20 09:35:44,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:44,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:44,431 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:44,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 09:35:44,631 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,SelfDestructingSolverStorable15 [2024-11-20 09:35:44,631 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:44,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 24937234, now seen corresponding path program 8 times [2024-11-20 09:35:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92892439] [2024-11-20 09:35:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92892439] [2024-11-20 09:35:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92892439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704208939] [2024-11-20 09:35:45,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:45,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:45,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:35:45,151 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:45,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:45,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:45,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:45,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:45,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:35:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:45,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:45,477 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:45,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704208939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:45,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:45,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-11-20 09:35:45,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264091038] [2024-11-20 09:35:45,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:45,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:35:45,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:35:45,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:35:45,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:45,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 88 transitions, 865 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:45,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:45,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:45,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:45,874 INFO L124 PetriNetUnfolderBase]: 237/450 cut-off events. [2024-11-20 09:35:45,874 INFO L125 PetriNetUnfolderBase]: For 4779/4779 co-relation queries the response was YES. [2024-11-20 09:35:45,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 450 events. 237/450 cut-off events. For 4779/4779 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1798 event pairs, 60 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 2755. Up to 359 conditions per place. [2024-11-20 09:35:45,879 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 80 selfloop transitions, 28 changer transitions 2/111 dead transitions. [2024-11-20 09:35:45,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 111 transitions, 1275 flow [2024-11-20 09:35:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2024-11-20 09:35:45,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-11-20 09:35:45,880 INFO L175 Difference]: Start difference. First operand has 104 places, 88 transitions, 865 flow. Second operand 12 states and 87 transitions. [2024-11-20 09:35:45,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 111 transitions, 1275 flow [2024-11-20 09:35:45,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1177 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-11-20 09:35:45,890 INFO L231 Difference]: Finished difference. Result has 107 places, 96 transitions, 976 flow [2024-11-20 09:35:45,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=976, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2024-11-20 09:35:45,891 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 85 predicate places. [2024-11-20 09:35:45,891 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 976 flow [2024-11-20 09:35:45,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:45,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:45,891 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:45,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:46,091 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,SelfDestructingSolverStorable16 [2024-11-20 09:35:46,092 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:46,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1571983864, now seen corresponding path program 9 times [2024-11-20 09:35:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:46,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811616895] [2024-11-20 09:35:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811616895] [2024-11-20 09:35:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811616895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057091815] [2024-11-20 09:35:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:46,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:46,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:35:46,604 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:35:46,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:46,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:46,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:46,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:46,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:35:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:46,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:46,983 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:35:46,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:35:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057091815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:47,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-11-20 09:35:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139115789] [2024-11-20 09:35:47,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:47,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:35:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:35:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:35:47,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:47,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 976 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:47,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:47,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:47,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:47,460 INFO L124 PetriNetUnfolderBase]: 237/448 cut-off events. [2024-11-20 09:35:47,460 INFO L125 PetriNetUnfolderBase]: For 4740/4740 co-relation queries the response was YES. [2024-11-20 09:35:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2830 conditions, 448 events. 237/448 cut-off events. For 4740/4740 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1793 event pairs, 62 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 2747. Up to 346 conditions per place. [2024-11-20 09:35:47,465 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 81 selfloop transitions, 28 changer transitions 4/114 dead transitions. [2024-11-20 09:35:47,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 114 transitions, 1315 flow [2024-11-20 09:35:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:35:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:35:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-11-20 09:35:47,466 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-20 09:35:47,466 INFO L175 Difference]: Start difference. First operand has 107 places, 96 transitions, 976 flow. Second operand 13 states and 91 transitions. [2024-11-20 09:35:47,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 114 transitions, 1315 flow [2024-11-20 09:35:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1199 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:47,478 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 938 flow [2024-11-20 09:35:47,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=938, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2024-11-20 09:35:47,479 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 91 predicate places. [2024-11-20 09:35:47,479 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 938 flow [2024-11-20 09:35:47,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:47,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:47,479 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:47,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 09:35:47,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 09:35:47,680 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:47,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1541303714, now seen corresponding path program 10 times [2024-11-20 09:35:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870164056] [2024-11-20 09:35:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:48,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:48,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870164056] [2024-11-20 09:35:48,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870164056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:48,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307302645] [2024-11-20 09:35:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:35:48,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:48,132 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:48,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 09:35:48,235 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:35:48,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:48,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:35:48,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:48,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:48,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-20 09:35:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:48,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:48,468 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-20 09:35:48,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-20 09:35:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:48,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307302645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:48,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:48,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:35:48,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719377610] [2024-11-20 09:35:48,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:48,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:35:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:35:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:35:48,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:48,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 938 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:35:48,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:48,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:48,818 INFO L124 PetriNetUnfolderBase]: 241/456 cut-off events. [2024-11-20 09:35:48,818 INFO L125 PetriNetUnfolderBase]: For 4302/4302 co-relation queries the response was YES. [2024-11-20 09:35:48,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 456 events. 241/456 cut-off events. For 4302/4302 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1838 event pairs, 51 based on Foata normal form. 4/460 useless extension candidates. Maximal degree in co-relation 2743. Up to 200 conditions per place. [2024-11-20 09:35:48,825 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 78 selfloop transitions, 36 changer transitions 3/118 dead transitions. [2024-11-20 09:35:48,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 1377 flow [2024-11-20 09:35:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-11-20 09:35:48,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-11-20 09:35:48,826 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 938 flow. Second operand 9 states and 78 transitions. [2024-11-20 09:35:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 1377 flow [2024-11-20 09:35:48,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 1317 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-11-20 09:35:48,836 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 973 flow [2024-11-20 09:35:48,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=973, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-11-20 09:35:48,837 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 89 predicate places. [2024-11-20 09:35:48,837 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 973 flow [2024-11-20 09:35:48,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:35:48,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:48,837 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:48,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:49,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:49,038 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:49,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash 191405013, now seen corresponding path program 11 times [2024-11-20 09:35:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:49,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419366061] [2024-11-20 09:35:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:49,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419366061] [2024-11-20 09:35:49,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419366061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277519703] [2024-11-20 09:35:49,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:49,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:49,410 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:49,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 09:35:49,553 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:35:49,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:49,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 09:35:49,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:49,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:49,745 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:49,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277519703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:49,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-20 09:35:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134533151] [2024-11-20 09:35:49,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:49,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:35:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:35:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:35:49,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:49,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 973 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:49,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:49,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:49,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:50,024 INFO L124 PetriNetUnfolderBase]: 255/480 cut-off events. [2024-11-20 09:35:50,024 INFO L125 PetriNetUnfolderBase]: For 5003/5003 co-relation queries the response was YES. [2024-11-20 09:35:50,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 480 events. 255/480 cut-off events. For 5003/5003 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1972 event pairs, 33 based on Foata normal form. 5/485 useless extension candidates. Maximal degree in co-relation 2968. Up to 222 conditions per place. [2024-11-20 09:35:50,028 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 87 selfloop transitions, 37 changer transitions 1/126 dead transitions. [2024-11-20 09:35:50,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 1512 flow [2024-11-20 09:35:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:35:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:35:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-11-20 09:35:50,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-20 09:35:50,029 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 973 flow. Second operand 10 states and 84 transitions. [2024-11-20 09:35:50,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 1512 flow [2024-11-20 09:35:50,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 1455 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-20 09:35:50,041 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 1042 flow [2024-11-20 09:35:50,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1042, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2024-11-20 09:35:50,041 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2024-11-20 09:35:50,041 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 1042 flow [2024-11-20 09:35:50,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:50,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:50,042 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:50,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:50,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:50,242 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:50,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1890922335, now seen corresponding path program 12 times [2024-11-20 09:35:50,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:50,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914873199] [2024-11-20 09:35:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914873199] [2024-11-20 09:35:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914873199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968227042] [2024-11-20 09:35:50,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:35:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:50,626 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) [2024-11-20 09:35:50,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 09:35:50,730 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:35:50,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:50,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:50,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:50,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:50,996 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:50,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968227042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:51,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-20 09:35:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204452024] [2024-11-20 09:35:51,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:51,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:35:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:35:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:35:51,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:51,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 1042 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:51,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:51,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:51,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:51,329 INFO L124 PetriNetUnfolderBase]: 283/528 cut-off events. [2024-11-20 09:35:51,330 INFO L125 PetriNetUnfolderBase]: For 6265/6265 co-relation queries the response was YES. [2024-11-20 09:35:51,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 528 events. 283/528 cut-off events. For 6265/6265 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2243 event pairs, 33 based on Foata normal form. 5/533 useless extension candidates. Maximal degree in co-relation 3423. Up to 219 conditions per place. [2024-11-20 09:35:51,334 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 43 changer transitions 1/135 dead transitions. [2024-11-20 09:35:51,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 135 transitions, 1683 flow [2024-11-20 09:35:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2024-11-20 09:35:51,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2024-11-20 09:35:51,335 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 1042 flow. Second operand 12 states and 98 transitions. [2024-11-20 09:35:51,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 135 transitions, 1683 flow [2024-11-20 09:35:51,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 135 transitions, 1565 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-11-20 09:35:51,348 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 1132 flow [2024-11-20 09:35:51,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1132, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2024-11-20 09:35:51,350 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 100 predicate places. [2024-11-20 09:35:51,350 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 1132 flow [2024-11-20 09:35:51,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:51,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:51,350 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:51,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 09:35:51,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:51,551 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:51,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:51,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1902220609, now seen corresponding path program 13 times [2024-11-20 09:35:51,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:51,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961004518] [2024-11-20 09:35:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:51,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961004518] [2024-11-20 09:35:51,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961004518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283244223] [2024-11-20 09:35:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:35:51,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:51,971 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) [2024-11-20 09:35:51,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 09:35:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:52,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:35:52,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:52,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:52,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-20 09:35:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:52,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:52,385 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:52,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283244223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:52,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:52,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-20 09:35:52,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378805454] [2024-11-20 09:35:52,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:52,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:35:52,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:52,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:35:52,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:35:52,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:52,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 1132 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:52,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:52,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:52,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:52,933 INFO L124 PetriNetUnfolderBase]: 313/586 cut-off events. [2024-11-20 09:35:52,933 INFO L125 PetriNetUnfolderBase]: For 7601/7601 co-relation queries the response was YES. [2024-11-20 09:35:52,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 586 events. 313/586 cut-off events. For 7601/7601 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2579 event pairs, 33 based on Foata normal form. 5/591 useless extension candidates. Maximal degree in co-relation 3856. Up to 208 conditions per place. [2024-11-20 09:35:52,938 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 96 selfloop transitions, 50 changer transitions 3/150 dead transitions. [2024-11-20 09:35:52,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 150 transitions, 1856 flow [2024-11-20 09:35:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:35:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:35:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2024-11-20 09:35:52,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2024-11-20 09:35:52,939 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 1132 flow. Second operand 15 states and 122 transitions. [2024-11-20 09:35:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 150 transitions, 1856 flow [2024-11-20 09:35:52,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 1753 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:52,953 INFO L231 Difference]: Finished difference. Result has 131 places, 109 transitions, 1240 flow [2024-11-20 09:35:52,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1240, PETRI_PLACES=131, PETRI_TRANSITIONS=109} [2024-11-20 09:35:52,954 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-11-20 09:35:52,954 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 109 transitions, 1240 flow [2024-11-20 09:35:52,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:52,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:52,954 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:52,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 09:35:53,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:53,155 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:53,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1611925751, now seen corresponding path program 14 times [2024-11-20 09:35:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323949151] [2024-11-20 09:35:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323949151] [2024-11-20 09:35:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323949151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757112208] [2024-11-20 09:35:53,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:35:53,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:53,540 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:53,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 09:35:53,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:35:53,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:53,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:35:53,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:53,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:53,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:35:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:53,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:53,927 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:35:53,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:35:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757112208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:53,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:35:53,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454299919] [2024-11-20 09:35:53,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:53,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:35:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:35:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:35:53,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:53,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 109 transitions, 1240 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:53,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:53,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:53,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:54,300 INFO L124 PetriNetUnfolderBase]: 309/574 cut-off events. [2024-11-20 09:35:54,300 INFO L125 PetriNetUnfolderBase]: For 7191/7191 co-relation queries the response was YES. [2024-11-20 09:35:54,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3991 conditions, 574 events. 309/574 cut-off events. For 7191/7191 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2497 event pairs, 33 based on Foata normal form. 2/576 useless extension candidates. Maximal degree in co-relation 3901. Up to 208 conditions per place. [2024-11-20 09:35:54,305 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 87 selfloop transitions, 47 changer transitions 5/140 dead transitions. [2024-11-20 09:35:54,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 140 transitions, 1798 flow [2024-11-20 09:35:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:35:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:35:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 104 transitions. [2024-11-20 09:35:54,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:35:54,306 INFO L175 Difference]: Start difference. First operand has 131 places, 109 transitions, 1240 flow. Second operand 13 states and 104 transitions. [2024-11-20 09:35:54,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 140 transitions, 1798 flow [2024-11-20 09:35:54,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 140 transitions, 1668 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-20 09:35:54,319 INFO L231 Difference]: Finished difference. Result has 131 places, 107 transitions, 1186 flow [2024-11-20 09:35:54,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1186, PETRI_PLACES=131, PETRI_TRANSITIONS=107} [2024-11-20 09:35:54,320 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-11-20 09:35:54,320 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 107 transitions, 1186 flow [2024-11-20 09:35:54,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:54,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:54,320 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:54,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 09:35:54,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:54,521 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:54,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2133033234, now seen corresponding path program 15 times [2024-11-20 09:35:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15840049] [2024-11-20 09:35:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:54,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15840049] [2024-11-20 09:35:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15840049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355113894] [2024-11-20 09:35:54,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:35:54,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:54,990 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:54,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 09:35:55,110 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:35:55,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:55,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-20 09:35:55,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:55,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:55,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-20 09:35:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:55,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:55,382 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:35:55,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:35:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355113894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:55,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:55,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:35:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258686048] [2024-11-20 09:35:55,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:55,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:35:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:35:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:35:55,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:55,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 107 transitions, 1186 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:55,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:55,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:55,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:55,805 INFO L124 PetriNetUnfolderBase]: 315/587 cut-off events. [2024-11-20 09:35:55,805 INFO L125 PetriNetUnfolderBase]: For 7407/7407 co-relation queries the response was YES. [2024-11-20 09:35:55,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 587 events. 315/587 cut-off events. For 7407/7407 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2569 event pairs, 105 based on Foata normal form. 6/593 useless extension candidates. Maximal degree in co-relation 3976. Up to 465 conditions per place. [2024-11-20 09:35:55,809 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 102 selfloop transitions, 25 changer transitions 5/133 dead transitions. [2024-11-20 09:35:55,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 133 transitions, 1735 flow [2024-11-20 09:35:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:35:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:35:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2024-11-20 09:35:55,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2024-11-20 09:35:55,810 INFO L175 Difference]: Start difference. First operand has 131 places, 107 transitions, 1186 flow. Second operand 12 states and 93 transitions. [2024-11-20 09:35:55,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 133 transitions, 1735 flow [2024-11-20 09:35:55,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 133 transitions, 1635 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-11-20 09:35:55,823 INFO L231 Difference]: Finished difference. Result has 130 places, 109 transitions, 1197 flow [2024-11-20 09:35:55,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1197, PETRI_PLACES=130, PETRI_TRANSITIONS=109} [2024-11-20 09:35:55,823 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2024-11-20 09:35:55,823 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 109 transitions, 1197 flow [2024-11-20 09:35:55,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:55,823 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:55,823 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:55,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 09:35:56,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:56,024 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:56,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash 996485234, now seen corresponding path program 16 times [2024-11-20 09:35:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:56,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652860256] [2024-11-20 09:35:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652860256] [2024-11-20 09:35:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652860256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873238043] [2024-11-20 09:35:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:35:56,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:56,469 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:56,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 09:35:56,610 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:35:56,611 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:56,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:35:56,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:56,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:56,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-20 09:35:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:56,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:56,848 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:35:56,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:35:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873238043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:56,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:56,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-20 09:35:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588682425] [2024-11-20 09:35:56,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:56,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:35:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:35:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:35:56,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:56,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 109 transitions, 1197 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:56,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:56,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:56,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:57,228 INFO L124 PetriNetUnfolderBase]: 312/583 cut-off events. [2024-11-20 09:35:57,228 INFO L125 PetriNetUnfolderBase]: For 8320/8320 co-relation queries the response was YES. [2024-11-20 09:35:57,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 583 events. 312/583 cut-off events. For 8320/8320 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2539 event pairs, 108 based on Foata normal form. 6/589 useless extension candidates. Maximal degree in co-relation 4037. Up to 460 conditions per place. [2024-11-20 09:35:57,234 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 96 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-11-20 09:35:57,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 123 transitions, 1590 flow [2024-11-20 09:35:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:35:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:35:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-11-20 09:35:57,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:35:57,235 INFO L175 Difference]: Start difference. First operand has 130 places, 109 transitions, 1197 flow. Second operand 9 states and 72 transitions. [2024-11-20 09:35:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 123 transitions, 1590 flow [2024-11-20 09:35:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 123 transitions, 1489 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-11-20 09:35:57,252 INFO L231 Difference]: Finished difference. Result has 127 places, 107 transitions, 1174 flow [2024-11-20 09:35:57,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1174, PETRI_PLACES=127, PETRI_TRANSITIONS=107} [2024-11-20 09:35:57,253 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2024-11-20 09:35:57,253 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 107 transitions, 1174 flow [2024-11-20 09:35:57,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:57,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:57,253 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:57,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:57,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-20 09:35:57,454 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:57,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2114018255, now seen corresponding path program 17 times [2024-11-20 09:35:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:57,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769793409] [2024-11-20 09:35:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:57,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769793409] [2024-11-20 09:35:57,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769793409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:57,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996386001] [2024-11-20 09:35:57,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:35:57,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:57,896 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:57,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 09:35:58,076 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:35:58,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:58,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:35:58,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:58,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:35:58,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-20 09:35:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:58,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:58,368 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:35:58,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:35:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:58,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996386001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:35:58,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:35:58,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-20 09:35:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268626950] [2024-11-20 09:35:58,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:35:58,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:35:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:35:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:35:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:35:58,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:35:58,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 107 transitions, 1174 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:58,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:35:58,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:35:58,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:35:59,007 INFO L124 PetriNetUnfolderBase]: 352/684 cut-off events. [2024-11-20 09:35:59,007 INFO L125 PetriNetUnfolderBase]: For 9763/9763 co-relation queries the response was YES. [2024-11-20 09:35:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 684 events. 352/684 cut-off events. For 9763/9763 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3201 event pairs, 125 based on Foata normal form. 13/697 useless extension candidates. Maximal degree in co-relation 4664. Up to 511 conditions per place. [2024-11-20 09:35:59,012 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 121 selfloop transitions, 35 changer transitions 0/157 dead transitions. [2024-11-20 09:35:59,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 157 transitions, 2001 flow [2024-11-20 09:35:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:35:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:35:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 134 transitions. [2024-11-20 09:35:59,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3582887700534759 [2024-11-20 09:35:59,019 INFO L175 Difference]: Start difference. First operand has 127 places, 107 transitions, 1174 flow. Second operand 17 states and 134 transitions. [2024-11-20 09:35:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 157 transitions, 2001 flow [2024-11-20 09:35:59,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 157 transitions, 1941 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-20 09:35:59,037 INFO L231 Difference]: Finished difference. Result has 143 places, 118 transitions, 1434 flow [2024-11-20 09:35:59,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1434, PETRI_PLACES=143, PETRI_TRANSITIONS=118} [2024-11-20 09:35:59,038 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2024-11-20 09:35:59,038 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 118 transitions, 1434 flow [2024-11-20 09:35:59,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:35:59,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:35:59,039 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:35:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 09:35:59,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 09:35:59,240 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:35:59,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:35:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1567141995, now seen corresponding path program 18 times [2024-11-20 09:35:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:35:59,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797382477] [2024-11-20 09:35:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:35:59,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:35:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:35:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:35:59,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797382477] [2024-11-20 09:35:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797382477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:35:59,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582100523] [2024-11-20 09:35:59,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:35:59,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:35:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:35:59,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:35:59,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 09:35:59,716 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:35:59,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:35:59,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 09:35:59,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:35:59,866 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 09:35:59,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:35:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:35:59,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:35:59,968 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:35:59,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:00,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582100523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:00,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:00,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-11-20 09:36:00,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275974632] [2024-11-20 09:36:00,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:00,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:36:00,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:36:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:36:00,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:00,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 118 transitions, 1434 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:00,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:00,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:00,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:00,307 INFO L124 PetriNetUnfolderBase]: 359/696 cut-off events. [2024-11-20 09:36:00,307 INFO L125 PetriNetUnfolderBase]: For 13333/13333 co-relation queries the response was YES. [2024-11-20 09:36:00,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 696 events. 359/696 cut-off events. For 13333/13333 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3286 event pairs, 141 based on Foata normal form. 5/701 useless extension candidates. Maximal degree in co-relation 5206. Up to 585 conditions per place. [2024-11-20 09:36:00,315 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 110 selfloop transitions, 24 changer transitions 0/135 dead transitions. [2024-11-20 09:36:00,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 135 transitions, 1869 flow [2024-11-20 09:36:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2024-11-20 09:36:00,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2024-11-20 09:36:00,316 INFO L175 Difference]: Start difference. First operand has 143 places, 118 transitions, 1434 flow. Second operand 9 states and 71 transitions. [2024-11-20 09:36:00,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 135 transitions, 1869 flow [2024-11-20 09:36:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 135 transitions, 1737 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-11-20 09:36:00,341 INFO L231 Difference]: Finished difference. Result has 146 places, 119 transitions, 1389 flow [2024-11-20 09:36:00,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1389, PETRI_PLACES=146, PETRI_TRANSITIONS=119} [2024-11-20 09:36:00,342 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-11-20 09:36:00,342 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 119 transitions, 1389 flow [2024-11-20 09:36:00,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:00,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:00,342 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:00,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:00,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-20 09:36:00,543 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:00,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1576162677, now seen corresponding path program 19 times [2024-11-20 09:36:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719438206] [2024-11-20 09:36:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:00,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:00,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719438206] [2024-11-20 09:36:00,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719438206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:00,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941746207] [2024-11-20 09:36:00,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:36:00,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:00,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:00,910 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:00,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 09:36:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:01,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:36:01,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:01,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:01,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-20 09:36:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:01,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:01,249 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:01,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:01,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941746207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:01,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:01,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-20 09:36:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871835423] [2024-11-20 09:36:01,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:01,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:36:01,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:36:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:36:01,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:01,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 119 transitions, 1389 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:01,622 INFO L124 PetriNetUnfolderBase]: 373/720 cut-off events. [2024-11-20 09:36:01,622 INFO L125 PetriNetUnfolderBase]: For 15012/15012 co-relation queries the response was YES. [2024-11-20 09:36:01,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5510 conditions, 720 events. 373/720 cut-off events. For 15012/15012 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3431 event pairs, 140 based on Foata normal form. 5/725 useless extension candidates. Maximal degree in co-relation 5411. Up to 585 conditions per place. [2024-11-20 09:36:01,628 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 112 selfloop transitions, 30 changer transitions 0/143 dead transitions. [2024-11-20 09:36:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 143 transitions, 1914 flow [2024-11-20 09:36:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:36:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:36:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 86 transitions. [2024-11-20 09:36:01,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35537190082644626 [2024-11-20 09:36:01,629 INFO L175 Difference]: Start difference. First operand has 146 places, 119 transitions, 1389 flow. Second operand 11 states and 86 transitions. [2024-11-20 09:36:01,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 143 transitions, 1914 flow [2024-11-20 09:36:01,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 143 transitions, 1792 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:01,652 INFO L231 Difference]: Finished difference. Result has 150 places, 122 transitions, 1423 flow [2024-11-20 09:36:01,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1423, PETRI_PLACES=150, PETRI_TRANSITIONS=122} [2024-11-20 09:36:01,653 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2024-11-20 09:36:01,653 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 122 transitions, 1423 flow [2024-11-20 09:36:01,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:01,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:01,653 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:01,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-20 09:36:01,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:01,853 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:01,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash 982470174, now seen corresponding path program 20 times [2024-11-20 09:36:01,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:01,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890078936] [2024-11-20 09:36:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:01,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890078936] [2024-11-20 09:36:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890078936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35043103] [2024-11-20 09:36:02,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:36:02,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:02,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:02,590 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:02,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 09:36:02,706 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:02,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:02,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 09:36:02,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:02,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:02,953 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:02,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35043103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:03,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 26 [2024-11-20 09:36:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170577818] [2024-11-20 09:36:03,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:03,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 09:36:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 09:36:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-20 09:36:03,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:03,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 122 transitions, 1423 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:03,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:03,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:03,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:03,426 INFO L124 PetriNetUnfolderBase]: 361/696 cut-off events. [2024-11-20 09:36:03,426 INFO L125 PetriNetUnfolderBase]: For 13552/13552 co-relation queries the response was YES. [2024-11-20 09:36:03,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5303 conditions, 696 events. 361/696 cut-off events. For 13552/13552 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3270 event pairs, 147 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 5203. Up to 602 conditions per place. [2024-11-20 09:36:03,432 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 93 selfloop transitions, 32 changer transitions 6/132 dead transitions. [2024-11-20 09:36:03,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 132 transitions, 1759 flow [2024-11-20 09:36:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:36:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:36:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 90 transitions. [2024-11-20 09:36:03,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2922077922077922 [2024-11-20 09:36:03,433 INFO L175 Difference]: Start difference. First operand has 150 places, 122 transitions, 1423 flow. Second operand 14 states and 90 transitions. [2024-11-20 09:36:03,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 132 transitions, 1759 flow [2024-11-20 09:36:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 132 transitions, 1672 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:03,459 INFO L231 Difference]: Finished difference. Result has 155 places, 119 transitions, 1366 flow [2024-11-20 09:36:03,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1366, PETRI_PLACES=155, PETRI_TRANSITIONS=119} [2024-11-20 09:36:03,459 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2024-11-20 09:36:03,459 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 119 transitions, 1366 flow [2024-11-20 09:36:03,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:03,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:03,460 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:03,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:03,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 09:36:03,660 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:03,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash 564678892, now seen corresponding path program 21 times [2024-11-20 09:36:03,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:03,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17859008] [2024-11-20 09:36:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:04,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:04,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17859008] [2024-11-20 09:36:04,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17859008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:04,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759139800] [2024-11-20 09:36:04,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:36:04,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:04,084 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:04,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 09:36:04,200 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:36:04,200 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:04,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-20 09:36:04,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:04,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:04,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-20 09:36:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:04,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:04,484 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:04,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759139800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:04,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:04,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-20 09:36:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926434470] [2024-11-20 09:36:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:04,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:04,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:04,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 119 transitions, 1366 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:04,908 INFO L124 PetriNetUnfolderBase]: 362/686 cut-off events. [2024-11-20 09:36:04,908 INFO L125 PetriNetUnfolderBase]: For 13001/13001 co-relation queries the response was YES. [2024-11-20 09:36:04,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5216 conditions, 686 events. 362/686 cut-off events. For 13001/13001 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3130 event pairs, 130 based on Foata normal form. 8/694 useless extension candidates. Maximal degree in co-relation 5106. Up to 555 conditions per place. [2024-11-20 09:36:04,913 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 29 changer transitions 0/141 dead transitions. [2024-11-20 09:36:04,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 141 transitions, 1977 flow [2024-11-20 09:36:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:36:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:36:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2024-11-20 09:36:04,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3446969696969697 [2024-11-20 09:36:04,914 INFO L175 Difference]: Start difference. First operand has 155 places, 119 transitions, 1366 flow. Second operand 12 states and 91 transitions. [2024-11-20 09:36:04,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 141 transitions, 1977 flow [2024-11-20 09:36:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 141 transitions, 1899 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-11-20 09:36:04,937 INFO L231 Difference]: Finished difference. Result has 149 places, 120 transitions, 1383 flow [2024-11-20 09:36:04,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1383, PETRI_PLACES=149, PETRI_TRANSITIONS=120} [2024-11-20 09:36:04,938 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-11-20 09:36:04,938 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 120 transitions, 1383 flow [2024-11-20 09:36:04,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:04,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:04,938 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:04,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:05,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:05,139 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:05,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash -42713103, now seen corresponding path program 22 times [2024-11-20 09:36:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119718986] [2024-11-20 09:36:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:05,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119718986] [2024-11-20 09:36:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119718986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820883109] [2024-11-20 09:36:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:36:05,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:05,550 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:05,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 09:36:05,674 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:36:05,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:05,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:36:05,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:05,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:05,818 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:05,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820883109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:05,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:36:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675957562] [2024-11-20 09:36:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:05,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:05,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:05,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 120 transitions, 1383 flow. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2024-11-20 09:36:05,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:05,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:05,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:06,085 INFO L124 PetriNetUnfolderBase]: 360/684 cut-off events. [2024-11-20 09:36:06,086 INFO L125 PetriNetUnfolderBase]: For 12678/12678 co-relation queries the response was YES. [2024-11-20 09:36:06,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5189 conditions, 684 events. 360/684 cut-off events. For 12678/12678 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3152 event pairs, 146 based on Foata normal form. 2/686 useless extension candidates. Maximal degree in co-relation 5090. Up to 600 conditions per place. [2024-11-20 09:36:06,091 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 19 changer transitions 4/128 dead transitions. [2024-11-20 09:36:06,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 128 transitions, 1705 flow [2024-11-20 09:36:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 63 transitions. [2024-11-20 09:36:06,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-20 09:36:06,091 INFO L175 Difference]: Start difference. First operand has 149 places, 120 transitions, 1383 flow. Second operand 9 states and 63 transitions. [2024-11-20 09:36:06,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 128 transitions, 1705 flow [2024-11-20 09:36:06,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 128 transitions, 1636 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:06,112 INFO L231 Difference]: Finished difference. Result has 148 places, 117 transitions, 1325 flow [2024-11-20 09:36:06,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=148, PETRI_TRANSITIONS=117} [2024-11-20 09:36:06,112 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-11-20 09:36:06,112 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 117 transitions, 1325 flow [2024-11-20 09:36:06,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2024-11-20 09:36:06,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:06,113 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:06,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:06,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-20 09:36:06,313 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:06,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash -696176334, now seen corresponding path program 23 times [2024-11-20 09:36:06,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:06,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92653905] [2024-11-20 09:36:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92653905] [2024-11-20 09:36:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92653905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924549330] [2024-11-20 09:36:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:06,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:06,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:06,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:06,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 09:36:06,938 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:36:06,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:06,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 09:36:06,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:07,074 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:36:07,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:36:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:07,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:07,230 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:07,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:07,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924549330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:07,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:07,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2024-11-20 09:36:07,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315239200] [2024-11-20 09:36:07,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:07,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:36:07,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:36:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:36:07,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:07,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 117 transitions, 1325 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:07,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:07,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:07,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:07,669 INFO L124 PetriNetUnfolderBase]: 366/687 cut-off events. [2024-11-20 09:36:07,670 INFO L125 PetriNetUnfolderBase]: For 12586/12586 co-relation queries the response was YES. [2024-11-20 09:36:07,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5230 conditions, 687 events. 366/687 cut-off events. For 12586/12586 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3127 event pairs, 136 based on Foata normal form. 10/697 useless extension candidates. Maximal degree in co-relation 5131. Up to 583 conditions per place. [2024-11-20 09:36:07,674 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 111 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-11-20 09:36:07,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 138 transitions, 1931 flow [2024-11-20 09:36:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:36:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:36:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-11-20 09:36:07,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-20 09:36:07,678 INFO L175 Difference]: Start difference. First operand has 148 places, 117 transitions, 1325 flow. Second operand 12 states and 88 transitions. [2024-11-20 09:36:07,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 138 transitions, 1931 flow [2024-11-20 09:36:07,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 138 transitions, 1885 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:07,718 INFO L231 Difference]: Finished difference. Result has 148 places, 121 transitions, 1430 flow [2024-11-20 09:36:07,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1430, PETRI_PLACES=148, PETRI_TRANSITIONS=121} [2024-11-20 09:36:07,719 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-11-20 09:36:07,719 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 121 transitions, 1430 flow [2024-11-20 09:36:07,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:07,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:07,719 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:07,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-20 09:36:07,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:07,920 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:07,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1337665969, now seen corresponding path program 24 times [2024-11-20 09:36:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:07,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017862660] [2024-11-20 09:36:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:07,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017862660] [2024-11-20 09:36:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017862660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995289503] [2024-11-20 09:36:08,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:08,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:08,302 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:08,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-20 09:36:08,426 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:36:08,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:08,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 09:36:08,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:08,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:08,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:36:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:08,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:08,732 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:08,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:08,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995289503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:08,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-11-20 09:36:08,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546515359] [2024-11-20 09:36:08,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:08,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:36:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:36:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:36:08,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:08,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 121 transitions, 1430 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:08,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:08,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:08,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:09,173 INFO L124 PetriNetUnfolderBase]: 360/665 cut-off events. [2024-11-20 09:36:09,173 INFO L125 PetriNetUnfolderBase]: For 13192/13192 co-relation queries the response was YES. [2024-11-20 09:36:09,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 665 events. 360/665 cut-off events. For 13192/13192 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2959 event pairs, 131 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 5106. Up to 568 conditions per place. [2024-11-20 09:36:09,178 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 106 selfloop transitions, 24 changer transitions 2/133 dead transitions. [2024-11-20 09:36:09,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 133 transitions, 1796 flow [2024-11-20 09:36:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:36:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:36:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2024-11-20 09:36:09,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-11-20 09:36:09,179 INFO L175 Difference]: Start difference. First operand has 148 places, 121 transitions, 1430 flow. Second operand 10 states and 72 transitions. [2024-11-20 09:36:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 133 transitions, 1796 flow [2024-11-20 09:36:09,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 133 transitions, 1672 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:09,201 INFO L231 Difference]: Finished difference. Result has 148 places, 119 transitions, 1338 flow [2024-11-20 09:36:09,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1338, PETRI_PLACES=148, PETRI_TRANSITIONS=119} [2024-11-20 09:36:09,202 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-11-20 09:36:09,202 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 119 transitions, 1338 flow [2024-11-20 09:36:09,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:09,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:09,202 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:09,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:09,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:09,403 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:09,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -86307746, now seen corresponding path program 25 times [2024-11-20 09:36:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344261480] [2024-11-20 09:36:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:09,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:09,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344261480] [2024-11-20 09:36:09,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344261480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:09,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444173655] [2024-11-20 09:36:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:36:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:09,766 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:09,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-20 09:36:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:09,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:36:09,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:09,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:10,043 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:10,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:10,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444173655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:10,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:10,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:36:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851555771] [2024-11-20 09:36:10,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:10,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:10,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 119 transitions, 1338 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:36:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:10,326 INFO L124 PetriNetUnfolderBase]: 356/659 cut-off events. [2024-11-20 09:36:10,326 INFO L125 PetriNetUnfolderBase]: For 12912/12912 co-relation queries the response was YES. [2024-11-20 09:36:10,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 659 events. 356/659 cut-off events. For 12912/12912 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2937 event pairs, 130 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 4987. Up to 561 conditions per place. [2024-11-20 09:36:10,334 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 20 changer transitions 8/133 dead transitions. [2024-11-20 09:36:10,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1687 flow [2024-11-20 09:36:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2024-11-20 09:36:10,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-20 09:36:10,334 INFO L175 Difference]: Start difference. First operand has 148 places, 119 transitions, 1338 flow. Second operand 9 states and 66 transitions. [2024-11-20 09:36:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1687 flow [2024-11-20 09:36:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 133 transitions, 1634 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:10,356 INFO L231 Difference]: Finished difference. Result has 147 places, 119 transitions, 1332 flow [2024-11-20 09:36:10,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1332, PETRI_PLACES=147, PETRI_TRANSITIONS=119} [2024-11-20 09:36:10,357 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-11-20 09:36:10,357 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 119 transitions, 1332 flow [2024-11-20 09:36:10,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:36:10,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:10,358 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:10,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-20 09:36:10,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:10,558 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:10,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:10,559 INFO L85 PathProgramCache]: Analyzing trace with hash -580702024, now seen corresponding path program 26 times [2024-11-20 09:36:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:10,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069748804] [2024-11-20 09:36:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069748804] [2024-11-20 09:36:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069748804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230663389] [2024-11-20 09:36:10,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:36:10,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:10,885 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:10,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-20 09:36:11,015 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:11,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:11,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-20 09:36:11,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:11,140 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 09:36:11,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:36:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:11,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:11,232 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:36:11,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:36:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230663389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:11,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-20 09:36:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439597070] [2024-11-20 09:36:11,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:11,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:11,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 119 transitions, 1332 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:11,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:11,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:11,515 INFO L124 PetriNetUnfolderBase]: 363/664 cut-off events. [2024-11-20 09:36:11,515 INFO L125 PetriNetUnfolderBase]: For 13824/13824 co-relation queries the response was YES. [2024-11-20 09:36:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 664 events. 363/664 cut-off events. For 13824/13824 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2907 event pairs, 24 based on Foata normal form. 4/668 useless extension candidates. Maximal degree in co-relation 5195. Up to 287 conditions per place. [2024-11-20 09:36:11,520 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 98 selfloop transitions, 45 changer transitions 1/145 dead transitions. [2024-11-20 09:36:11,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 145 transitions, 2009 flow [2024-11-20 09:36:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:36:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:36:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 78 transitions. [2024-11-20 09:36:11,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-11-20 09:36:11,521 INFO L175 Difference]: Start difference. First operand has 147 places, 119 transitions, 1332 flow. Second operand 10 states and 78 transitions. [2024-11-20 09:36:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 145 transitions, 2009 flow [2024-11-20 09:36:11,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 145 transitions, 1957 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:11,547 INFO L231 Difference]: Finished difference. Result has 149 places, 121 transitions, 1420 flow [2024-11-20 09:36:11,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1420, PETRI_PLACES=149, PETRI_TRANSITIONS=121} [2024-11-20 09:36:11,548 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-11-20 09:36:11,548 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 121 transitions, 1420 flow [2024-11-20 09:36:11,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:11,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:11,548 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:11,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-20 09:36:11,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-20 09:36:11,749 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:11,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1624769889, now seen corresponding path program 27 times [2024-11-20 09:36:11,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:11,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388808005] [2024-11-20 09:36:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388808005] [2024-11-20 09:36:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388808005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948869225] [2024-11-20 09:36:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:36:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:12,133 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:12,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-20 09:36:12,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:36:12,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:12,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:36:12,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:12,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:12,494 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-20 09:36:12,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-20 09:36:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948869225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:12,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:12,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:36:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433475881] [2024-11-20 09:36:12,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:12,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:36:12,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:36:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:36:12,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:12,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 121 transitions, 1420 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:12,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:12,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:12,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:12,903 INFO L124 PetriNetUnfolderBase]: 361/662 cut-off events. [2024-11-20 09:36:12,903 INFO L125 PetriNetUnfolderBase]: For 14468/14468 co-relation queries the response was YES. [2024-11-20 09:36:12,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5361 conditions, 662 events. 361/662 cut-off events. For 14468/14468 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2910 event pairs, 73 based on Foata normal form. 2/664 useless extension candidates. Maximal degree in co-relation 5258. Up to 353 conditions per place. [2024-11-20 09:36:12,909 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 94 selfloop transitions, 44 changer transitions 8/147 dead transitions. [2024-11-20 09:36:12,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 2000 flow [2024-11-20 09:36:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-11-20 09:36:12,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:36:12,910 INFO L175 Difference]: Start difference. First operand has 149 places, 121 transitions, 1420 flow. Second operand 9 states and 72 transitions. [2024-11-20 09:36:12,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 2000 flow [2024-11-20 09:36:12,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 1874 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:12,936 INFO L231 Difference]: Finished difference. Result has 153 places, 122 transitions, 1472 flow [2024-11-20 09:36:12,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1472, PETRI_PLACES=153, PETRI_TRANSITIONS=122} [2024-11-20 09:36:12,936 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2024-11-20 09:36:12,937 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 122 transitions, 1472 flow [2024-11-20 09:36:12,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:12,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:12,937 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:12,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-20 09:36:13,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-20 09:36:13,138 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:13,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash 753889306, now seen corresponding path program 28 times [2024-11-20 09:36:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:13,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773068466] [2024-11-20 09:36:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773068466] [2024-11-20 09:36:13,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773068466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246893571] [2024-11-20 09:36:13,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:36:13,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:13,495 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:13,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-20 09:36:13,642 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:36:13,642 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:13,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:36:13,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:13,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:13,842 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:36:13,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:36:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246893571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:13,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:13,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:36:13,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320028214] [2024-11-20 09:36:13,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:13,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:13,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:13,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 122 transitions, 1472 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:36:13,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:13,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:13,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:14,171 INFO L124 PetriNetUnfolderBase]: 382/691 cut-off events. [2024-11-20 09:36:14,171 INFO L125 PetriNetUnfolderBase]: For 16336/16336 co-relation queries the response was YES. [2024-11-20 09:36:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5892 conditions, 691 events. 382/691 cut-off events. For 16336/16336 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3027 event pairs, 24 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 5788. Up to 303 conditions per place. [2024-11-20 09:36:14,176 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 100 selfloop transitions, 51 changer transitions 1/153 dead transitions. [2024-11-20 09:36:14,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 153 transitions, 2240 flow [2024-11-20 09:36:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:36:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:36:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2024-11-20 09:36:14,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3446969696969697 [2024-11-20 09:36:14,177 INFO L175 Difference]: Start difference. First operand has 153 places, 122 transitions, 1472 flow. Second operand 12 states and 91 transitions. [2024-11-20 09:36:14,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 153 transitions, 2240 flow [2024-11-20 09:36:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 153 transitions, 2099 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-11-20 09:36:14,207 INFO L231 Difference]: Finished difference. Result has 159 places, 127 transitions, 1603 flow [2024-11-20 09:36:14,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1603, PETRI_PLACES=159, PETRI_TRANSITIONS=127} [2024-11-20 09:36:14,207 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 137 predicate places. [2024-11-20 09:36:14,207 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 127 transitions, 1603 flow [2024-11-20 09:36:14,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-20 09:36:14,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:14,207 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:14,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:14,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:14,409 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:14,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash 679894773, now seen corresponding path program 29 times [2024-11-20 09:36:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232664779] [2024-11-20 09:36:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232664779] [2024-11-20 09:36:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232664779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072904975] [2024-11-20 09:36:14,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:14,864 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-20 09:36:15,034 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:36:15,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:15,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 09:36:15,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:15,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:15,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-20 09:36:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:15,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:15,289 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-20 09:36:15,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-20 09:36:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072904975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:15,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:15,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-20 09:36:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652632877] [2024-11-20 09:36:15,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:15,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:36:15,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:36:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:36:15,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:15,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 127 transitions, 1603 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:15,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:15,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:15,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:15,756 INFO L124 PetriNetUnfolderBase]: 391/713 cut-off events. [2024-11-20 09:36:15,756 INFO L125 PetriNetUnfolderBase]: For 13621/13621 co-relation queries the response was YES. [2024-11-20 09:36:15,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5772 conditions, 713 events. 391/713 cut-off events. For 13621/13621 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3191 event pairs, 90 based on Foata normal form. 5/718 useless extension candidates. Maximal degree in co-relation 5666. Up to 398 conditions per place. [2024-11-20 09:36:15,761 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 46 changer transitions 1/149 dead transitions. [2024-11-20 09:36:15,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 149 transitions, 2084 flow [2024-11-20 09:36:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-11-20 09:36:15,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-11-20 09:36:15,765 INFO L175 Difference]: Start difference. First operand has 159 places, 127 transitions, 1603 flow. Second operand 9 states and 78 transitions. [2024-11-20 09:36:15,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 149 transitions, 2084 flow [2024-11-20 09:36:15,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 149 transitions, 1993 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:15,794 INFO L231 Difference]: Finished difference. Result has 161 places, 128 transitions, 1644 flow [2024-11-20 09:36:15,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1644, PETRI_PLACES=161, PETRI_TRANSITIONS=128} [2024-11-20 09:36:15,794 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-11-20 09:36:15,794 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 128 transitions, 1644 flow [2024-11-20 09:36:15,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:15,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:15,795 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:15,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:15,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-20 09:36:15,995 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:15,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1123615104, now seen corresponding path program 30 times [2024-11-20 09:36:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:15,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334905090] [2024-11-20 09:36:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334905090] [2024-11-20 09:36:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334905090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943589999] [2024-11-20 09:36:16,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:16,387 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:16,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-20 09:36:16,529 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-20 09:36:16,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:16,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:36:16,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:16,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:16,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:36:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:16,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:16,748 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:16,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943589999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:16,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:36:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593832169] [2024-11-20 09:36:16,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:16,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:36:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:36:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:36:16,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 128 transitions, 1644 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-20 09:36:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:16,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:17,121 INFO L124 PetriNetUnfolderBase]: 401/736 cut-off events. [2024-11-20 09:36:17,121 INFO L125 PetriNetUnfolderBase]: For 13826/13826 co-relation queries the response was YES. [2024-11-20 09:36:17,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6068 conditions, 736 events. 401/736 cut-off events. For 13826/13826 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3375 event pairs, 143 based on Foata normal form. 4/740 useless extension candidates. Maximal degree in co-relation 5962. Up to 612 conditions per place. [2024-11-20 09:36:17,127 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 25 changer transitions 2/145 dead transitions. [2024-11-20 09:36:17,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 145 transitions, 2110 flow [2024-11-20 09:36:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-11-20 09:36:17,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:36:17,128 INFO L175 Difference]: Start difference. First operand has 161 places, 128 transitions, 1644 flow. Second operand 9 states and 72 transitions. [2024-11-20 09:36:17,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 145 transitions, 2110 flow [2024-11-20 09:36:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 145 transitions, 1994 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:17,157 INFO L231 Difference]: Finished difference. Result has 163 places, 129 transitions, 1612 flow [2024-11-20 09:36:17,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1612, PETRI_PLACES=163, PETRI_TRANSITIONS=129} [2024-11-20 09:36:17,158 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2024-11-20 09:36:17,158 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 129 transitions, 1612 flow [2024-11-20 09:36:17,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-20 09:36:17,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:17,158 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:17,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-20 09:36:17,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-20 09:36:17,359 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:17,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1394907230, now seen corresponding path program 31 times [2024-11-20 09:36:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:17,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683578507] [2024-11-20 09:36:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683578507] [2024-11-20 09:36:17,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683578507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388445539] [2024-11-20 09:36:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:36:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:17,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:17,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-20 09:36:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:17,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:36:17,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:17,966 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 09:36:17,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:36:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:17,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:18,074 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:18,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388445539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:18,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-20 09:36:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400980028] [2024-11-20 09:36:18,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:18,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:36:18,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:36:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:36:18,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:18,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 129 transitions, 1612 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:18,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:18,355 INFO L124 PetriNetUnfolderBase]: 407/746 cut-off events. [2024-11-20 09:36:18,355 INFO L125 PetriNetUnfolderBase]: For 13635/13635 co-relation queries the response was YES. [2024-11-20 09:36:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 746 events. 407/746 cut-off events. For 13635/13635 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3417 event pairs, 150 based on Foata normal form. 4/750 useless extension candidates. Maximal degree in co-relation 5965. Up to 637 conditions per place. [2024-11-20 09:36:18,360 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 119 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-11-20 09:36:18,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 143 transitions, 2110 flow [2024-11-20 09:36:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2024-11-20 09:36:18,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-20 09:36:18,361 INFO L175 Difference]: Start difference. First operand has 163 places, 129 transitions, 1612 flow. Second operand 9 states and 67 transitions. [2024-11-20 09:36:18,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 143 transitions, 2110 flow [2024-11-20 09:36:18,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 143 transitions, 2049 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:18,391 INFO L231 Difference]: Finished difference. Result has 165 places, 130 transitions, 1632 flow [2024-11-20 09:36:18,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1632, PETRI_PLACES=165, PETRI_TRANSITIONS=130} [2024-11-20 09:36:18,392 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 143 predicate places. [2024-11-20 09:36:18,392 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 130 transitions, 1632 flow [2024-11-20 09:36:18,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:18,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:18,392 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:18,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:18,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-20 09:36:18,593 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:18,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1712242296, now seen corresponding path program 32 times [2024-11-20 09:36:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79786165] [2024-11-20 09:36:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:18,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:18,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79786165] [2024-11-20 09:36:18,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79786165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:18,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699286425] [2024-11-20 09:36:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:36:18,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:18,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:18,998 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-20 09:36:19,153 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:19,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:19,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:36:19,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:19,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:19,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:36:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:19,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:19,496 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:36:19,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:36:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699286425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:19,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:36:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133393875] [2024-11-20 09:36:19,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:19,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:36:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:36:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:36:19,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:19,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 130 transitions, 1632 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:19,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:19,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:19,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:19,957 INFO L124 PetriNetUnfolderBase]: 415/767 cut-off events. [2024-11-20 09:36:19,957 INFO L125 PetriNetUnfolderBase]: For 14521/14521 co-relation queries the response was YES. [2024-11-20 09:36:19,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6309 conditions, 767 events. 415/767 cut-off events. For 14521/14521 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3578 event pairs, 21 based on Foata normal form. 6/773 useless extension candidates. Maximal degree in co-relation 6201. Up to 329 conditions per place. [2024-11-20 09:36:19,963 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 103 selfloop transitions, 56 changer transitions 6/166 dead transitions. [2024-11-20 09:36:19,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 166 transitions, 2399 flow [2024-11-20 09:36:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:36:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:36:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 109 transitions. [2024-11-20 09:36:19,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3538961038961039 [2024-11-20 09:36:19,964 INFO L175 Difference]: Start difference. First operand has 165 places, 130 transitions, 1632 flow. Second operand 14 states and 109 transitions. [2024-11-20 09:36:19,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 166 transitions, 2399 flow [2024-11-20 09:36:19,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 166 transitions, 2321 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:19,999 INFO L231 Difference]: Finished difference. Result has 173 places, 132 transitions, 1752 flow [2024-11-20 09:36:20,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1752, PETRI_PLACES=173, PETRI_TRANSITIONS=132} [2024-11-20 09:36:20,000 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2024-11-20 09:36:20,000 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 132 transitions, 1752 flow [2024-11-20 09:36:20,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:20,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:20,000 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:20,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-20 09:36:20,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:20,201 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:20,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash 690841853, now seen corresponding path program 33 times [2024-11-20 09:36:20,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:20,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881872008] [2024-11-20 09:36:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881872008] [2024-11-20 09:36:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881872008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355927997] [2024-11-20 09:36:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:36:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:20,549 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-20 09:36:20,697 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:36:20,697 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:20,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-20 09:36:20,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:20,839 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 09:36:20,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-20 09:36:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:20,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:20,932 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:20,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355927997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:20,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-11-20 09:36:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819526735] [2024-11-20 09:36:20,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:20,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:36:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:36:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:36:20,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:20,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 132 transitions, 1752 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:20,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:20,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:20,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:21,279 INFO L124 PetriNetUnfolderBase]: 417/767 cut-off events. [2024-11-20 09:36:21,279 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-11-20 09:36:21,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 767 events. 417/767 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3549 event pairs, 159 based on Foata normal form. 5/772 useless extension candidates. Maximal degree in co-relation 6392. Up to 669 conditions per place. [2024-11-20 09:36:21,285 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 125 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-11-20 09:36:21,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 147 transitions, 2177 flow [2024-11-20 09:36:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-11-20 09:36:21,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-11-20 09:36:21,286 INFO L175 Difference]: Start difference. First operand has 173 places, 132 transitions, 1752 flow. Second operand 9 states and 68 transitions. [2024-11-20 09:36:21,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 147 transitions, 2177 flow [2024-11-20 09:36:21,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 147 transitions, 1982 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-11-20 09:36:21,322 INFO L231 Difference]: Finished difference. Result has 170 places, 133 transitions, 1641 flow [2024-11-20 09:36:21,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1641, PETRI_PLACES=170, PETRI_TRANSITIONS=133} [2024-11-20 09:36:21,322 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2024-11-20 09:36:21,323 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 133 transitions, 1641 flow [2024-11-20 09:36:21,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:21,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:21,323 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:21,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:21,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:21,523 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:21,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1110492390, now seen corresponding path program 34 times [2024-11-20 09:36:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137627157] [2024-11-20 09:36:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:21,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137627157] [2024-11-20 09:36:21,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137627157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604373423] [2024-11-20 09:36:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:36:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:21,878 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-20 09:36:22,021 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:36:22,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:22,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:36:22,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:22,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:22,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-20 09:36:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:22,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:22,192 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:22,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:22,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604373423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:22,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:36:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254638570] [2024-11-20 09:36:22,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:22,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:22,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:22,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:22,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 133 transitions, 1641 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:36:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:22,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:22,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:22,572 INFO L124 PetriNetUnfolderBase]: 415/760 cut-off events. [2024-11-20 09:36:22,572 INFO L125 PetriNetUnfolderBase]: For 14311/14311 co-relation queries the response was YES. [2024-11-20 09:36:22,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6105 conditions, 760 events. 415/760 cut-off events. For 14311/14311 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3502 event pairs, 142 based on Foata normal form. 4/764 useless extension candidates. Maximal degree in co-relation 5994. Up to 631 conditions per place. [2024-11-20 09:36:22,578 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 28 changer transitions 1/152 dead transitions. [2024-11-20 09:36:22,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 152 transitions, 2234 flow [2024-11-20 09:36:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:36:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:36:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 80 transitions. [2024-11-20 09:36:22,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2024-11-20 09:36:22,579 INFO L175 Difference]: Start difference. First operand has 170 places, 133 transitions, 1641 flow. Second operand 11 states and 80 transitions. [2024-11-20 09:36:22,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 152 transitions, 2234 flow [2024-11-20 09:36:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 152 transitions, 2139 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-11-20 09:36:22,616 INFO L231 Difference]: Finished difference. Result has 174 places, 135 transitions, 1652 flow [2024-11-20 09:36:22,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1652, PETRI_PLACES=174, PETRI_TRANSITIONS=135} [2024-11-20 09:36:22,616 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 152 predicate places. [2024-11-20 09:36:22,616 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 135 transitions, 1652 flow [2024-11-20 09:36:22,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:36:22,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:22,616 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:22,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-20 09:36:22,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-20 09:36:22,817 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:22,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1552018653, now seen corresponding path program 35 times [2024-11-20 09:36:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838929866] [2024-11-20 09:36:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:23,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:23,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838929866] [2024-11-20 09:36:23,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838929866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:23,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252229885] [2024-11-20 09:36:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:23,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:23,233 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:23,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-20 09:36:23,431 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:36:23,431 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:23,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-20 09:36:23,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:23,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:23,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-20 09:36:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:23,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:23,792 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:23,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252229885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:23,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:23,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 25 [2024-11-20 09:36:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584878337] [2024-11-20 09:36:23,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:23,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:36:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:36:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:36:23,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:23,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 135 transitions, 1652 flow. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:23,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:23,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:23,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:24,325 INFO L124 PetriNetUnfolderBase]: 440/819 cut-off events. [2024-11-20 09:36:24,326 INFO L125 PetriNetUnfolderBase]: For 16885/16885 co-relation queries the response was YES. [2024-11-20 09:36:24,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6584 conditions, 819 events. 440/819 cut-off events. For 16885/16885 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3922 event pairs, 96 based on Foata normal form. 10/829 useless extension candidates. Maximal degree in co-relation 6494. Up to 660 conditions per place. [2024-11-20 09:36:24,332 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 136 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-11-20 09:36:24,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 171 transitions, 2410 flow [2024-11-20 09:36:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:36:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:36:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 113 transitions. [2024-11-20 09:36:24,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-11-20 09:36:24,332 INFO L175 Difference]: Start difference. First operand has 174 places, 135 transitions, 1652 flow. Second operand 15 states and 113 transitions. [2024-11-20 09:36:24,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 171 transitions, 2410 flow [2024-11-20 09:36:24,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 171 transitions, 2298 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-11-20 09:36:24,363 INFO L231 Difference]: Finished difference. Result has 179 places, 144 transitions, 1859 flow [2024-11-20 09:36:24,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1859, PETRI_PLACES=179, PETRI_TRANSITIONS=144} [2024-11-20 09:36:24,364 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2024-11-20 09:36:24,364 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 144 transitions, 1859 flow [2024-11-20 09:36:24,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:24,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:24,364 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:24,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:24,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-20 09:36:24,565 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:24,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash -179574403, now seen corresponding path program 36 times [2024-11-20 09:36:24,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:24,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670683960] [2024-11-20 09:36:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:24,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:24,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670683960] [2024-11-20 09:36:24,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670683960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719568937] [2024-11-20 09:36:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:24,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:24,985 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:24,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-20 09:36:25,137 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:36:25,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:25,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 09:36:25,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:25,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:25,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:36:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:25,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:25,425 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-20 09:36:25,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-20 09:36:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719568937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:36:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153128196] [2024-11-20 09:36:25,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:25,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:36:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:36:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:36:25,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:25,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 144 transitions, 1859 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:25,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:25,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:25,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:25,966 INFO L124 PetriNetUnfolderBase]: 436/807 cut-off events. [2024-11-20 09:36:25,967 INFO L125 PetriNetUnfolderBase]: For 16265/16265 co-relation queries the response was YES. [2024-11-20 09:36:25,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6664 conditions, 807 events. 436/807 cut-off events. For 16265/16265 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3829 event pairs, 102 based on Foata normal form. 2/809 useless extension candidates. Maximal degree in co-relation 6552. Up to 473 conditions per place. [2024-11-20 09:36:25,973 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 108 selfloop transitions, 49 changer transitions 2/160 dead transitions. [2024-11-20 09:36:25,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 160 transitions, 2288 flow [2024-11-20 09:36:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:36:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:36:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-11-20 09:36:25,974 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-20 09:36:25,974 INFO L175 Difference]: Start difference. First operand has 179 places, 144 transitions, 1859 flow. Second operand 10 states and 77 transitions. [2024-11-20 09:36:25,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 160 transitions, 2288 flow [2024-11-20 09:36:26,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 160 transitions, 2110 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-11-20 09:36:26,010 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1760 flow [2024-11-20 09:36:26,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1760, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-11-20 09:36:26,010 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 159 predicate places. [2024-11-20 09:36:26,010 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1760 flow [2024-11-20 09:36:26,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:26,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:26,011 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:26,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-20 09:36:26,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-20 09:36:26,211 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:26,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 591958039, now seen corresponding path program 37 times [2024-11-20 09:36:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485376780] [2024-11-20 09:36:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:26,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:26,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485376780] [2024-11-20 09:36:26,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485376780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:26,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222046243] [2024-11-20 09:36:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:36:26,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:26,590 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:26,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-20 09:36:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:26,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:36:26,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:26,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:26,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-20 09:36:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:26,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:26,922 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:26,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222046243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:26,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:26,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-20 09:36:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553364895] [2024-11-20 09:36:26,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:26,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:36:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:36:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:36:26,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:26,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1760 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:26,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:26,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:26,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:27,328 INFO L124 PetriNetUnfolderBase]: 437/811 cut-off events. [2024-11-20 09:36:27,328 INFO L125 PetriNetUnfolderBase]: For 15480/15480 co-relation queries the response was YES. [2024-11-20 09:36:27,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6506 conditions, 811 events. 437/811 cut-off events. For 15480/15480 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3864 event pairs, 149 based on Foata normal form. 5/816 useless extension candidates. Maximal degree in co-relation 6394. Up to 669 conditions per place. [2024-11-20 09:36:27,335 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 141 selfloop transitions, 29 changer transitions 3/174 dead transitions. [2024-11-20 09:36:27,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 174 transitions, 2403 flow [2024-11-20 09:36:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:36:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:36:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2024-11-20 09:36:27,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3531468531468531 [2024-11-20 09:36:27,336 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1760 flow. Second operand 13 states and 101 transitions. [2024-11-20 09:36:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 174 transitions, 2403 flow [2024-11-20 09:36:27,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 174 transitions, 2299 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:27,375 INFO L231 Difference]: Finished difference. Result has 185 places, 145 transitions, 1798 flow [2024-11-20 09:36:27,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1798, PETRI_PLACES=185, PETRI_TRANSITIONS=145} [2024-11-20 09:36:27,375 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 163 predicate places. [2024-11-20 09:36:27,375 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 145 transitions, 1798 flow [2024-11-20 09:36:27,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:27,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:27,376 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:27,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:27,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-20 09:36:27,576 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:27,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1453603132, now seen corresponding path program 38 times [2024-11-20 09:36:27,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:27,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806051846] [2024-11-20 09:36:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806051846] [2024-11-20 09:36:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806051846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895417280] [2024-11-20 09:36:28,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:36:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:28,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:28,012 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:28,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-20 09:36:28,180 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:28,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:28,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 09:36:28,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:28,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:28,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-20 09:36:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:28,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:28,481 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:28,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:28,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895417280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:28,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-20 09:36:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596708000] [2024-11-20 09:36:28,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:28,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:36:28,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:36:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:36:28,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:28,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 145 transitions, 1798 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-20 09:36:28,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:28,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:28,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:28,969 INFO L124 PetriNetUnfolderBase]: 428/789 cut-off events. [2024-11-20 09:36:28,970 INFO L125 PetriNetUnfolderBase]: For 13263/13263 co-relation queries the response was YES. [2024-11-20 09:36:28,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6272 conditions, 789 events. 428/789 cut-off events. For 13263/13263 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3684 event pairs, 152 based on Foata normal form. 3/792 useless extension candidates. Maximal degree in co-relation 6158. Up to 685 conditions per place. [2024-11-20 09:36:28,976 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 128 selfloop transitions, 24 changer transitions 3/156 dead transitions. [2024-11-20 09:36:28,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 156 transitions, 2196 flow [2024-11-20 09:36:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:36:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:36:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2024-11-20 09:36:28,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-11-20 09:36:28,976 INFO L175 Difference]: Start difference. First operand has 185 places, 145 transitions, 1798 flow. Second operand 10 states and 72 transitions. [2024-11-20 09:36:28,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 156 transitions, 2196 flow [2024-11-20 09:36:29,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 156 transitions, 2112 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:29,010 INFO L231 Difference]: Finished difference. Result has 185 places, 143 transitions, 1732 flow [2024-11-20 09:36:29,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1732, PETRI_PLACES=185, PETRI_TRANSITIONS=143} [2024-11-20 09:36:29,011 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 163 predicate places. [2024-11-20 09:36:29,011 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 143 transitions, 1732 flow [2024-11-20 09:36:29,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-20 09:36:29,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:29,011 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:29,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-20 09:36:29,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:29,211 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:29,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash -952561480, now seen corresponding path program 39 times [2024-11-20 09:36:29,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:29,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495274621] [2024-11-20 09:36:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:29,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:29,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:29,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495274621] [2024-11-20 09:36:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495274621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:29,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277862385] [2024-11-20 09:36:29,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:36:29,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:29,581 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:29,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-20 09:36:29,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:36:29,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:29,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 09:36:29,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:29,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:29,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-20 09:36:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:29,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:30,069 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 09:36:30,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 09:36:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277862385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:30,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 21 [2024-11-20 09:36:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358054934] [2024-11-20 09:36:30,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:30,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:36:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:36:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:36:30,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:30,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 143 transitions, 1732 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:30,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:30,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:30,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:30,895 INFO L124 PetriNetUnfolderBase]: 459/853 cut-off events. [2024-11-20 09:36:30,896 INFO L125 PetriNetUnfolderBase]: For 12807/12807 co-relation queries the response was YES. [2024-11-20 09:36:30,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 853 events. 459/853 cut-off events. For 12807/12807 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4096 event pairs, 14 based on Foata normal form. 8/861 useless extension candidates. Maximal degree in co-relation 6612. Up to 369 conditions per place. [2024-11-20 09:36:30,902 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 129 selfloop transitions, 80 changer transitions 0/210 dead transitions. [2024-11-20 09:36:30,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 210 transitions, 2838 flow [2024-11-20 09:36:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 09:36:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-20 09:36:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 168 transitions. [2024-11-20 09:36:30,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33201581027667987 [2024-11-20 09:36:30,903 INFO L175 Difference]: Start difference. First operand has 185 places, 143 transitions, 1732 flow. Second operand 23 states and 168 transitions. [2024-11-20 09:36:30,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 210 transitions, 2838 flow [2024-11-20 09:36:30,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 210 transitions, 2712 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-11-20 09:36:30,945 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2097 flow [2024-11-20 09:36:30,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2097, PETRI_PLACES=197, PETRI_TRANSITIONS=158} [2024-11-20 09:36:30,945 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2024-11-20 09:36:30,945 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2097 flow [2024-11-20 09:36:30,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:30,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:30,945 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:30,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:31,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-20 09:36:31,146 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:31,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1092855677, now seen corresponding path program 40 times [2024-11-20 09:36:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995746665] [2024-11-20 09:36:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:31,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995746665] [2024-11-20 09:36:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995746665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473251550] [2024-11-20 09:36:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:36:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:31,513 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:31,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-20 09:36:31,675 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:36:31,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:31,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:36:31,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:31,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:31,814 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:31,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-20 09:36:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:31,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473251550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:31,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:31,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-20 09:36:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365362733] [2024-11-20 09:36:31,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:31,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:36:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:36:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:36:31,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:31,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 158 transitions, 2097 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:36:31,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:31,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:31,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:32,136 INFO L124 PetriNetUnfolderBase]: 453/831 cut-off events. [2024-11-20 09:36:32,136 INFO L125 PetriNetUnfolderBase]: For 14702/14702 co-relation queries the response was YES. [2024-11-20 09:36:32,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7086 conditions, 831 events. 453/831 cut-off events. For 14702/14702 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3899 event pairs, 160 based on Foata normal form. 2/833 useless extension candidates. Maximal degree in co-relation 6968. Up to 736 conditions per place. [2024-11-20 09:36:32,143 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 138 selfloop transitions, 21 changer transitions 5/165 dead transitions. [2024-11-20 09:36:32,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 165 transitions, 2516 flow [2024-11-20 09:36:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:36:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:36:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 62 transitions. [2024-11-20 09:36:32,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31313131313131315 [2024-11-20 09:36:32,144 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2097 flow. Second operand 9 states and 62 transitions. [2024-11-20 09:36:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 165 transitions, 2516 flow [2024-11-20 09:36:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 165 transitions, 2208 flow, removed 84 selfloop flow, removed 13 redundant places. [2024-11-20 09:36:32,188 INFO L231 Difference]: Finished difference. Result has 191 places, 154 transitions, 1757 flow [2024-11-20 09:36:32,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=191, PETRI_TRANSITIONS=154} [2024-11-20 09:36:32,188 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 169 predicate places. [2024-11-20 09:36:32,188 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 154 transitions, 1757 flow [2024-11-20 09:36:32,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2024-11-20 09:36:32,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:32,188 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:32,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:32,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-20 09:36:32,389 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:32,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash -267511137, now seen corresponding path program 41 times [2024-11-20 09:36:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:32,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470923269] [2024-11-20 09:36:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:32,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470923269] [2024-11-20 09:36:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470923269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215782067] [2024-11-20 09:36:32,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:32,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:32,727 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:32,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-20 09:36:32,934 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:36:32,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:32,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:36:32,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:33,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:33,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-20 09:36:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:33,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:33,169 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-20 09:36:33,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-20 09:36:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:33,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215782067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:33,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:33,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-20 09:36:33,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787022972] [2024-11-20 09:36:33,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:33,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:36:33,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:36:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:36:33,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:33,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 154 transitions, 1757 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:33,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:33,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:33,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:33,488 INFO L124 PetriNetUnfolderBase]: 444/800 cut-off events. [2024-11-20 09:36:33,488 INFO L125 PetriNetUnfolderBase]: For 12772/12772 co-relation queries the response was YES. [2024-11-20 09:36:33,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6481 conditions, 800 events. 444/800 cut-off events. For 12772/12772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3656 event pairs, 148 based on Foata normal form. 2/802 useless extension candidates. Maximal degree in co-relation 6365. Up to 682 conditions per place. [2024-11-20 09:36:33,495 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 139 selfloop transitions, 25 changer transitions 2/167 dead transitions. [2024-11-20 09:36:33,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 167 transitions, 2214 flow [2024-11-20 09:36:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:36:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:36:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-11-20 09:36:33,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-11-20 09:36:33,496 INFO L175 Difference]: Start difference. First operand has 191 places, 154 transitions, 1757 flow. Second operand 11 states and 79 transitions. [2024-11-20 09:36:33,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 167 transitions, 2214 flow [2024-11-20 09:36:33,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 167 transitions, 2131 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-11-20 09:36:33,532 INFO L231 Difference]: Finished difference. Result has 182 places, 150 transitions, 1703 flow [2024-11-20 09:36:33,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1703, PETRI_PLACES=182, PETRI_TRANSITIONS=150} [2024-11-20 09:36:33,532 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2024-11-20 09:36:33,532 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 150 transitions, 1703 flow [2024-11-20 09:36:33,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:33,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:33,533 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:33,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:33,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-20 09:36:33,733 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:33,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash -653163177, now seen corresponding path program 42 times [2024-11-20 09:36:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409212842] [2024-11-20 09:36:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:34,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409212842] [2024-11-20 09:36:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409212842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095361919] [2024-11-20 09:36:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:34,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:34,422 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-20 09:36:34,602 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:36:34,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:34,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 09:36:34,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:34,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:34,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:36:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:34,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:35,006 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-20 09:36:35,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-11-20 09:36:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:35,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095361919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:35,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 30 [2024-11-20 09:36:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241450077] [2024-11-20 09:36:35,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:35,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-20 09:36:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-20 09:36:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2024-11-20 09:36:35,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:35,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 150 transitions, 1703 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:35,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:35,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:35,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:35,828 INFO L124 PetriNetUnfolderBase]: 559/1001 cut-off events. [2024-11-20 09:36:35,829 INFO L125 PetriNetUnfolderBase]: For 15463/15463 co-relation queries the response was YES. [2024-11-20 09:36:35,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 1001 events. 559/1001 cut-off events. For 15463/15463 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4895 event pairs, 45 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 7902. Up to 363 conditions per place. [2024-11-20 09:36:35,837 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 120 selfloop transitions, 82 changer transitions 3/206 dead transitions. [2024-11-20 09:36:35,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 206 transitions, 2792 flow [2024-11-20 09:36:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:36:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:36:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 141 transitions. [2024-11-20 09:36:35,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32045454545454544 [2024-11-20 09:36:35,838 INFO L175 Difference]: Start difference. First operand has 182 places, 150 transitions, 1703 flow. Second operand 20 states and 141 transitions. [2024-11-20 09:36:35,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 206 transitions, 2792 flow [2024-11-20 09:36:35,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 206 transitions, 2728 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-20 09:36:35,874 INFO L231 Difference]: Finished difference. Result has 193 places, 163 transitions, 2117 flow [2024-11-20 09:36:35,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2117, PETRI_PLACES=193, PETRI_TRANSITIONS=163} [2024-11-20 09:36:35,874 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 171 predicate places. [2024-11-20 09:36:35,875 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 163 transitions, 2117 flow [2024-11-20 09:36:35,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:35,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:35,875 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:35,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-20 09:36:36,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:36,076 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:36,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 201268159, now seen corresponding path program 43 times [2024-11-20 09:36:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534800121] [2024-11-20 09:36:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:36,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:36,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534800121] [2024-11-20 09:36:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534800121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763250773] [2024-11-20 09:36:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:36:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:36,773 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:36,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-20 09:36:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:36,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 09:36:36,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:37,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:37,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-20 09:36:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:37,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:37,336 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:36:37,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:36:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763250773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:37,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 31 [2024-11-20 09:36:37,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764345869] [2024-11-20 09:36:37,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:37,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-20 09:36:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-20 09:36:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2024-11-20 09:36:37,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:37,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 163 transitions, 2117 flow. Second operand has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:37,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:37,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:37,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:38,251 INFO L124 PetriNetUnfolderBase]: 622/1118 cut-off events. [2024-11-20 09:36:38,251 INFO L125 PetriNetUnfolderBase]: For 21685/21685 co-relation queries the response was YES. [2024-11-20 09:36:38,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9631 conditions, 1118 events. 622/1118 cut-off events. For 21685/21685 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5625 event pairs, 58 based on Foata normal form. 2/1120 useless extension candidates. Maximal degree in co-relation 9508. Up to 722 conditions per place. [2024-11-20 09:36:38,259 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 127 selfloop transitions, 91 changer transitions 2/221 dead transitions. [2024-11-20 09:36:38,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 221 transitions, 3341 flow [2024-11-20 09:36:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 09:36:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-20 09:36:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 178 transitions. [2024-11-20 09:36:38,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3236363636363636 [2024-11-20 09:36:38,260 INFO L175 Difference]: Start difference. First operand has 193 places, 163 transitions, 2117 flow. Second operand 25 states and 178 transitions. [2024-11-20 09:36:38,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 221 transitions, 3341 flow [2024-11-20 09:36:38,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 221 transitions, 3097 flow, removed 55 selfloop flow, removed 13 redundant places. [2024-11-20 09:36:38,308 INFO L231 Difference]: Finished difference. Result has 207 places, 181 transitions, 2577 flow [2024-11-20 09:36:38,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2577, PETRI_PLACES=207, PETRI_TRANSITIONS=181} [2024-11-20 09:36:38,308 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 185 predicate places. [2024-11-20 09:36:38,308 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 181 transitions, 2577 flow [2024-11-20 09:36:38,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:38,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:38,309 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:38,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-20 09:36:38,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:38,509 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:38,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1060737335, now seen corresponding path program 44 times [2024-11-20 09:36:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241746075] [2024-11-20 09:36:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:39,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241746075] [2024-11-20 09:36:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241746075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048890775] [2024-11-20 09:36:39,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:36:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:39,201 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:39,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-20 09:36:39,377 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:36:39,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:39,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 09:36:39,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:39,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:39,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:36:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 09:36:39,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:39,779 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:36:39,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:36:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:39,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048890775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:39,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:39,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 33 [2024-11-20 09:36:39,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092440784] [2024-11-20 09:36:39,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:39,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 09:36:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 09:36:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 09:36:39,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:39,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 181 transitions, 2577 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:39,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:39,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:39,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:41,060 INFO L124 PetriNetUnfolderBase]: 626/1134 cut-off events. [2024-11-20 09:36:41,060 INFO L125 PetriNetUnfolderBase]: For 22993/22993 co-relation queries the response was YES. [2024-11-20 09:36:41,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9838 conditions, 1134 events. 626/1134 cut-off events. For 22993/22993 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5777 event pairs, 64 based on Foata normal form. 2/1136 useless extension candidates. Maximal degree in co-relation 9714. Up to 716 conditions per place. [2024-11-20 09:36:41,071 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 92 changer transitions 5/227 dead transitions. [2024-11-20 09:36:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 227 transitions, 3425 flow [2024-11-20 09:36:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 09:36:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 09:36:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 186 transitions. [2024-11-20 09:36:41,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2024-11-20 09:36:41,072 INFO L175 Difference]: Start difference. First operand has 207 places, 181 transitions, 2577 flow. Second operand 26 states and 186 transitions. [2024-11-20 09:36:41,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 227 transitions, 3425 flow [2024-11-20 09:36:41,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 227 transitions, 3090 flow, removed 124 selfloop flow, removed 17 redundant places. [2024-11-20 09:36:41,135 INFO L231 Difference]: Finished difference. Result has 217 places, 183 transitions, 2485 flow [2024-11-20 09:36:41,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2485, PETRI_PLACES=217, PETRI_TRANSITIONS=183} [2024-11-20 09:36:41,136 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2024-11-20 09:36:41,136 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 183 transitions, 2485 flow [2024-11-20 09:36:41,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:41,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:41,136 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:41,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-20 09:36:41,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:41,337 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:41,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1509867643, now seen corresponding path program 45 times [2024-11-20 09:36:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268112870] [2024-11-20 09:36:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:41,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268112870] [2024-11-20 09:36:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268112870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554866438] [2024-11-20 09:36:41,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:36:41,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:41,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:41,960 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:41,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-20 09:36:42,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:36:42,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:42,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 09:36:42,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:42,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:42,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:36:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:42,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:42,530 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-20 09:36:42,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-20 09:36:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:42,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554866438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:42,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 30 [2024-11-20 09:36:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672373524] [2024-11-20 09:36:42,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:42,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-20 09:36:42,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-20 09:36:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2024-11-20 09:36:42,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:42,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 183 transitions, 2485 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:42,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:42,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:42,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:43,336 INFO L124 PetriNetUnfolderBase]: 642/1164 cut-off events. [2024-11-20 09:36:43,336 INFO L125 PetriNetUnfolderBase]: For 19349/19349 co-relation queries the response was YES. [2024-11-20 09:36:43,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9671 conditions, 1164 events. 642/1164 cut-off events. For 19349/19349 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5975 event pairs, 74 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 9545. Up to 833 conditions per place. [2024-11-20 09:36:43,344 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 131 selfloop transitions, 80 changer transitions 2/214 dead transitions. [2024-11-20 09:36:43,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 214 transitions, 3252 flow [2024-11-20 09:36:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:36:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:36:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 130 transitions. [2024-11-20 09:36:43,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31100478468899523 [2024-11-20 09:36:43,345 INFO L175 Difference]: Start difference. First operand has 217 places, 183 transitions, 2485 flow. Second operand 19 states and 130 transitions. [2024-11-20 09:36:43,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 214 transitions, 3252 flow [2024-11-20 09:36:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 214 transitions, 3097 flow, removed 10 selfloop flow, removed 22 redundant places. [2024-11-20 09:36:43,395 INFO L231 Difference]: Finished difference. Result has 217 places, 194 transitions, 2751 flow [2024-11-20 09:36:43,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2751, PETRI_PLACES=217, PETRI_TRANSITIONS=194} [2024-11-20 09:36:43,396 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2024-11-20 09:36:43,396 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 194 transitions, 2751 flow [2024-11-20 09:36:43,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:43,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:43,396 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:43,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-20 09:36:43,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-20 09:36:43,597 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:43,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:43,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1159621149, now seen corresponding path program 46 times [2024-11-20 09:36:43,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:43,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767399903] [2024-11-20 09:36:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:44,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767399903] [2024-11-20 09:36:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767399903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945584605] [2024-11-20 09:36:44,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:36:44,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:44,199 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-20 09:36:44,385 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:36:44,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:44,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 09:36:44,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:44,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:44,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-20 09:36:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:44,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:44,808 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:36:44,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:36:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:44,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945584605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:44,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:44,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-11-20 09:36:44,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673645975] [2024-11-20 09:36:44,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:44,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-20 09:36:44,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-20 09:36:44,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2024-11-20 09:36:44,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:44,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 194 transitions, 2751 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:44,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:44,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:44,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:45,863 INFO L124 PetriNetUnfolderBase]: 698/1266 cut-off events. [2024-11-20 09:36:45,863 INFO L125 PetriNetUnfolderBase]: For 24467/24467 co-relation queries the response was YES. [2024-11-20 09:36:45,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11123 conditions, 1266 events. 698/1266 cut-off events. For 24467/24467 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6562 event pairs, 66 based on Foata normal form. 3/1269 useless extension candidates. Maximal degree in co-relation 10993. Up to 846 conditions per place. [2024-11-20 09:36:45,875 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 155 selfloop transitions, 88 changer transitions 3/247 dead transitions. [2024-11-20 09:36:45,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 247 transitions, 3902 flow [2024-11-20 09:36:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 09:36:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-20 09:36:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 183 transitions. [2024-11-20 09:36:45,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3327272727272727 [2024-11-20 09:36:45,876 INFO L175 Difference]: Start difference. First operand has 217 places, 194 transitions, 2751 flow. Second operand 25 states and 183 transitions. [2024-11-20 09:36:45,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 247 transitions, 3902 flow [2024-11-20 09:36:45,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 247 transitions, 3621 flow, removed 91 selfloop flow, removed 13 redundant places. [2024-11-20 09:36:45,937 INFO L231 Difference]: Finished difference. Result has 231 places, 203 transitions, 2895 flow [2024-11-20 09:36:45,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2895, PETRI_PLACES=231, PETRI_TRANSITIONS=203} [2024-11-20 09:36:45,938 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 209 predicate places. [2024-11-20 09:36:45,938 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 203 transitions, 2895 flow [2024-11-20 09:36:45,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:45,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:45,939 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:45,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-20 09:36:46,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-20 09:36:46,140 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:46,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 472560285, now seen corresponding path program 47 times [2024-11-20 09:36:46,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:46,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896857057] [2024-11-20 09:36:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896857057] [2024-11-20 09:36:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896857057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348603298] [2024-11-20 09:36:46,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:36:46,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:46,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:46,933 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:46,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-20 09:36:47,188 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:36:47,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:47,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 09:36:47,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:47,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:47,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-11-20 09:36:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:47,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:47,654 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-20 09:36:47,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-20 09:36:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:47,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348603298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:47,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:47,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 36 [2024-11-20 09:36:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457040156] [2024-11-20 09:36:47,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:47,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-20 09:36:47,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-20 09:36:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 09:36:47,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:47,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 203 transitions, 2895 flow. Second operand has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:47,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:47,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:47,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:48,738 INFO L124 PetriNetUnfolderBase]: 706/1288 cut-off events. [2024-11-20 09:36:48,738 INFO L125 PetriNetUnfolderBase]: For 26011/26011 co-relation queries the response was YES. [2024-11-20 09:36:48,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11491 conditions, 1288 events. 706/1288 cut-off events. For 26011/26011 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6754 event pairs, 93 based on Foata normal form. 2/1290 useless extension candidates. Maximal degree in co-relation 11358. Up to 929 conditions per place. [2024-11-20 09:36:48,754 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 142 selfloop transitions, 81 changer transitions 5/229 dead transitions. [2024-11-20 09:36:48,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 229 transitions, 3613 flow [2024-11-20 09:36:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:36:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:36:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 135 transitions. [2024-11-20 09:36:48,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-11-20 09:36:48,756 INFO L175 Difference]: Start difference. First operand has 231 places, 203 transitions, 2895 flow. Second operand 20 states and 135 transitions. [2024-11-20 09:36:48,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 229 transitions, 3613 flow [2024-11-20 09:36:48,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 229 transitions, 3393 flow, removed 51 selfloop flow, removed 19 redundant places. [2024-11-20 09:36:48,855 INFO L231 Difference]: Finished difference. Result has 234 places, 205 transitions, 2929 flow [2024-11-20 09:36:48,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2929, PETRI_PLACES=234, PETRI_TRANSITIONS=205} [2024-11-20 09:36:48,855 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 212 predicate places. [2024-11-20 09:36:48,855 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 205 transitions, 2929 flow [2024-11-20 09:36:48,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:48,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:48,856 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:48,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-20 09:36:49,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-20 09:36:49,056 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:49,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1435307709, now seen corresponding path program 48 times [2024-11-20 09:36:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:49,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133988007] [2024-11-20 09:36:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:36:49,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133988007] [2024-11-20 09:36:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133988007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:36:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773912780] [2024-11-20 09:36:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:36:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:36:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:49,732 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:36:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-20 09:36:49,919 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-20 09:36:49,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:36:49,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 09:36:49,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:36:50,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:36:50,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-20 09:36:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 09:36:50,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:36:50,363 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-20 09:36:50,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-20 09:36:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 09:36:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773912780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:36:50,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:36:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 36 [2024-11-20 09:36:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838845626] [2024-11-20 09:36:50,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:36:50,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-20 09:36:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-20 09:36:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 09:36:50,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:50,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 205 transitions, 2929 flow. Second operand has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:50,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:50,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:50,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:51,679 INFO L124 PetriNetUnfolderBase]: 776/1423 cut-off events. [2024-11-20 09:36:51,679 INFO L125 PetriNetUnfolderBase]: For 30617/30617 co-relation queries the response was YES. [2024-11-20 09:36:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 1423 events. 776/1423 cut-off events. For 30617/30617 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7635 event pairs, 102 based on Foata normal form. 4/1427 useless extension candidates. Maximal degree in co-relation 12859. Up to 1205 conditions per place. [2024-11-20 09:36:51,693 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 199 selfloop transitions, 52 changer transitions 6/258 dead transitions. [2024-11-20 09:36:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 258 transitions, 4237 flow [2024-11-20 09:36:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 09:36:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-20 09:36:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 172 transitions. [2024-11-20 09:36:51,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32575757575757575 [2024-11-20 09:36:51,694 INFO L175 Difference]: Start difference. First operand has 234 places, 205 transitions, 2929 flow. Second operand 24 states and 172 transitions. [2024-11-20 09:36:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 258 transitions, 4237 flow [2024-11-20 09:36:51,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 258 transitions, 4095 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-11-20 09:36:51,769 INFO L231 Difference]: Finished difference. Result has 245 places, 217 transitions, 3276 flow [2024-11-20 09:36:51,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3276, PETRI_PLACES=245, PETRI_TRANSITIONS=217} [2024-11-20 09:36:51,769 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 223 predicate places. [2024-11-20 09:36:51,769 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 217 transitions, 3276 flow [2024-11-20 09:36:51,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:51,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:51,769 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:51,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-20 09:36:51,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-20 09:36:51,970 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:51,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1691008065, now seen corresponding path program 49 times [2024-11-20 09:36:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240268398] [2024-11-20 09:36:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat