./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC --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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:29:50,213 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:29:50,352 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:29:50,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:29:50,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:29:50,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:29:50,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:29:50,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:29:50,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:29:50,396 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:29:50,396 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:29:50,397 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:29:50,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:29:50,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:29:50,398 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:29:50,398 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:29:50,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:29:50,398 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:29:50,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:29:50,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:29:50,399 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:29:50,402 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:29:50,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:29:50,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:29:50,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:29:50,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:29:50,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:29:50,404 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:29:50,404 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:29:50,404 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:29:50,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:29:50,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:29:50,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:29:50,405 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:29:50,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:29:50,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:29:50,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:29:50,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:29:50,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:29:50,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:29:50,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:29:50,407 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC 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 -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-24 01:29:50,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:29:50,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:29:50,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:29:50,881 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:29:50,881 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:29:50,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-24 01:29:54,356 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/data/ad4f6e162/4473ac716a484a03b13c70fd789e727e/FLAG3daf74a3e [2024-11-24 01:29:54,726 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:29:54,727 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-24 01:29:54,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/data/ad4f6e162/4473ac716a484a03b13c70fd789e727e/FLAG3daf74a3e [2024-11-24 01:29:54,751 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/data/ad4f6e162/4473ac716a484a03b13c70fd789e727e [2024-11-24 01:29:54,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:29:54,757 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:29:54,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:29:54,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:29:54,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:29:54,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:29:54" (1/1) ... [2024-11-24 01:29:54,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c03fdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:54, skipping insertion in model container [2024-11-24 01:29:54,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:29:54" (1/1) ... [2024-11-24 01:29:54,783 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:29:55,009 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-24 01:29:55,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:29:55,041 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:29:55,080 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-24 01:29:55,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:29:55,116 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:29:55,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55 WrapperNode [2024-11-24 01:29:55,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:29:55,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:29:55,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:29:55,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:29:55,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,164 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 86 [2024-11-24 01:29:55,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:29:55,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:29:55,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:29:55,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:29:55,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,180 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,198 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-24 01:29:55,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,206 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:29:55,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:29:55,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:29:55,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:29:55,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (1/1) ... [2024-11-24 01:29:55,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:29:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:29:55,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:29:55,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:29:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:29:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:29:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:29:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:29:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 01:29:55,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:29:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:29:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:29:55,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:29:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:29:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:29:55,334 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:29:55,500 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:29:55,505 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:29:55,837 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:29:55,838 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:29:56,216 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:29:56,217 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 01:29:56,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:29:56 BoogieIcfgContainer [2024-11-24 01:29:56,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:29:56,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:29:56,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:29:56,227 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:29:56,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:29:54" (1/3) ... [2024-11-24 01:29:56,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:29:56, skipping insertion in model container [2024-11-24 01:29:56,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:29:55" (2/3) ... [2024-11-24 01:29:56,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:29:56, skipping insertion in model container [2024-11-24 01:29:56,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:29:56" (3/3) ... [2024-11-24 01:29:56,231 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-24 01:29:56,252 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:29:56,254 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sum-array-hom.wvr.c that has 4 procedures, 24 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-24 01:29:56,255 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:29:56,323 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 01:29:56,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-11-24 01:29:56,443 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-24 01:29:56,446 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:29:56,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-24 01:29:56,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-11-24 01:29:56,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-11-24 01:29:56,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:29:56,490 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;@12b1c1b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:29:56,490 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-24 01:29:56,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:29:56,510 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-11-24 01:29:56,510 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:29:56,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:29:56,525 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:29:56,526 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:29:56,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:29:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1932174216, now seen corresponding path program 1 times [2024-11-24 01:29:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:29:56,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813454062] [2024-11-24 01:29:56,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:29:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:29:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:29:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:29:57,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:29:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813454062] [2024-11-24 01:29:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813454062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:29:57,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:29:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:29:57,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096500597] [2024-11-24 01:29:57,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:29:57,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:29:57,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:29:57,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:29:57,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:29:57,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:29:57,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:57,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:29:57,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:29:57,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:29:58,102 INFO L124 PetriNetUnfolderBase]: 387/567 cut-off events. [2024-11-24 01:29:58,104 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-24 01:29:58,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 567 events. 387/567 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1792 event pairs, 124 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-24 01:29:58,118 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2024-11-24 01:29:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 191 flow [2024-11-24 01:29:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:29:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:29:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-24 01:29:58,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-11-24 01:29:58,145 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-11-24 01:29:58,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 191 flow [2024-11-24 01:29:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:29:58,167 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2024-11-24 01:29:58,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-11-24 01:29:58,175 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-11-24 01:29:58,176 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2024-11-24 01:29:58,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:58,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:29:58,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:29:58,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:29:58,177 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:29:58,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:29:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 900276298, now seen corresponding path program 1 times [2024-11-24 01:29:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:29:58,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48964819] [2024-11-24 01:29:58,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:29:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:29:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:29:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:29:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:29:58,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48964819] [2024-11-24 01:29:58,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48964819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:29:58,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:29:58,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:29:58,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931810216] [2024-11-24 01:29:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:29:58,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:29:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:29:58,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:29:58,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:29:58,473 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:29:58,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:58,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:29:58,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:29:58,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:29:58,913 INFO L124 PetriNetUnfolderBase]: 703/1050 cut-off events. [2024-11-24 01:29:58,913 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-24 01:29:58,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1050 events. 703/1050 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3876 event pairs, 401 based on Foata normal form. 46/1094 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2024-11-24 01:29:58,930 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-24 01:29:58,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 61 transitions, 298 flow [2024-11-24 01:29:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:29:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:29:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-24 01:29:58,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-11-24 01:29:58,934 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 5 states and 74 transitions. [2024-11-24 01:29:58,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 61 transitions, 298 flow [2024-11-24 01:29:58,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:29:58,939 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 112 flow [2024-11-24 01:29:58,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-24 01:29:58,940 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-24 01:29:58,940 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 112 flow [2024-11-24 01:29:58,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:58,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:29:58,942 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:29:58,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:29:58,944 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:29:58,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:29:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1079554071, now seen corresponding path program 1 times [2024-11-24 01:29:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:29:58,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398838590] [2024-11-24 01:29:58,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:29:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:29:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:29:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:29:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:29:59,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398838590] [2024-11-24 01:29:59,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398838590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:29:59,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:29:59,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:29:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629304049] [2024-11-24 01:29:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:29:59,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:29:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:29:59,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:29:59,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:29:59,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:29:59,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:59,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:29:59,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:29:59,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:29:59,693 INFO L124 PetriNetUnfolderBase]: 611/931 cut-off events. [2024-11-24 01:29:59,693 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2024-11-24 01:29:59,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 931 events. 611/931 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3425 event pairs, 372 based on Foata normal form. 41/971 useless extension candidates. Maximal degree in co-relation 1457. Up to 567 conditions per place. [2024-11-24 01:29:59,704 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-11-24 01:29:59,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 300 flow [2024-11-24 01:29:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:29:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:29:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-11-24 01:29:59,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-11-24 01:29:59,708 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 112 flow. Second operand 5 states and 71 transitions. [2024-11-24 01:29:59,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 300 flow [2024-11-24 01:29:59,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 01:29:59,714 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 135 flow [2024-11-24 01:29:59,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-24 01:29:59,717 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-11-24 01:29:59,718 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 135 flow [2024-11-24 01:29:59,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:59,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:29:59,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:29:59,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 01:29:59,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:29:59,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:29:59,722 INFO L85 PathProgramCache]: Analyzing trace with hash 491593892, now seen corresponding path program 1 times [2024-11-24 01:29:59,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:29:59,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046816911] [2024-11-24 01:29:59,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:29:59,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:29:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:29:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:29:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:29:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046816911] [2024-11-24 01:29:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046816911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:29:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:29:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:29:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927575081] [2024-11-24 01:29:59,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:29:59,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:29:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:29:59,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:29:59,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:29:59,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:29:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:29:59,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:29:59,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:29:59,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:00,289 INFO L124 PetriNetUnfolderBase]: 511/784 cut-off events. [2024-11-24 01:30:00,290 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2024-11-24 01:30:00,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 784 events. 511/784 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2698 event pairs, 333 based on Foata normal form. 22/805 useless extension candidates. Maximal degree in co-relation 1615. Up to 567 conditions per place. [2024-11-24 01:30:00,297 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 2 changer transitions 23/50 dead transitions. [2024-11-24 01:30:00,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 293 flow [2024-11-24 01:30:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:30:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:30:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-11-24 01:30:00,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-24 01:30:00,302 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 135 flow. Second operand 5 states and 67 transitions. [2024-11-24 01:30:00,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 293 flow [2024-11-24 01:30:00,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:30:00,307 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 108 flow [2024-11-24 01:30:00,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2024-11-24 01:30:00,308 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-11-24 01:30:00,308 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 108 flow [2024-11-24 01:30:00,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:00,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:00,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:00,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 01:30:00,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:00,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1200633171, now seen corresponding path program 1 times [2024-11-24 01:30:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:00,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286940768] [2024-11-24 01:30:00,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:00,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:00,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286940768] [2024-11-24 01:30:00,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286940768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661336670] [2024-11-24 01:30:00,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:00,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:30:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:00,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:30:00,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:00,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661336670] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:01,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-24 01:30:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774534154] [2024-11-24 01:30:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:01,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:30:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:01,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:30:01,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:30:01,111 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:01,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:01,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:01,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:01,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:01,548 INFO L124 PetriNetUnfolderBase]: 517/764 cut-off events. [2024-11-24 01:30:01,548 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-11-24 01:30:01,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 764 events. 517/764 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2649 event pairs, 150 based on Foata normal form. 14/777 useless extension candidates. Maximal degree in co-relation 2321. Up to 379 conditions per place. [2024-11-24 01:30:01,556 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-11-24 01:30:01,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 390 flow [2024-11-24 01:30:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:30:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:30:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-11-24 01:30:01,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-24 01:30:01,563 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 108 flow. Second operand 7 states and 84 transitions. [2024-11-24 01:30:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 390 flow [2024-11-24 01:30:01,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 322 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-24 01:30:01,576 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 139 flow [2024-11-24 01:30:01,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-24 01:30:01,577 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-11-24 01:30:01,577 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 139 flow [2024-11-24 01:30:01,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:01,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:01,578 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:01,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:30:01,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:01,782 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:01,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash -535459175, now seen corresponding path program 2 times [2024-11-24 01:30:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:01,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710305215] [2024-11-24 01:30:01,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:01,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:01,824 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710305215] [2024-11-24 01:30:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710305215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096446678] [2024-11-24 01:30:02,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:02,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:02,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:30:02,216 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:02,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:02,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:30:02,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:02,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096446678] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-24 01:30:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353084725] [2024-11-24 01:30:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:02,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:30:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:02,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:30:02,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:30:02,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:02,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:02,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:02,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:02,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:02,919 INFO L124 PetriNetUnfolderBase]: 678/1005 cut-off events. [2024-11-24 01:30:02,919 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-11-24 01:30:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1005 events. 678/1005 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3649 event pairs, 240 based on Foata normal form. 12/1016 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-11-24 01:30:02,932 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-11-24 01:30:02,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 435 flow [2024-11-24 01:30:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:30:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:30:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-11-24 01:30:02,936 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-11-24 01:30:02,936 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 139 flow. Second operand 7 states and 80 transitions. [2024-11-24 01:30:02,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 435 flow [2024-11-24 01:30:02,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 400 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-24 01:30:02,945 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 196 flow [2024-11-24 01:30:02,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-24 01:30:02,949 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-24 01:30:02,949 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 196 flow [2024-11-24 01:30:02,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:02,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:02,949 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:02,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:03,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:03,154 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:03,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1643404945, now seen corresponding path program 3 times [2024-11-24 01:30:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:03,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031980637] [2024-11-24 01:30:03,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:03,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:03,192 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:03,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:03,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031980637] [2024-11-24 01:30:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031980637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614941761] [2024-11-24 01:30:03,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:03,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:03,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:03,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:03,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:30:03,545 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:03,545 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:03,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:30:03,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:03,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:03,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614941761] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:03,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-24 01:30:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300249342] [2024-11-24 01:30:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:03,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:30:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:03,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:30:03,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:30:03,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:03,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:03,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:03,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:04,327 INFO L124 PetriNetUnfolderBase]: 784/1167 cut-off events. [2024-11-24 01:30:04,327 INFO L125 PetriNetUnfolderBase]: For 1992/1992 co-relation queries the response was YES. [2024-11-24 01:30:04,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1167 events. 784/1167 cut-off events. For 1992/1992 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4406 event pairs, 319 based on Foata normal form. 14/1180 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-11-24 01:30:04,341 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-11-24 01:30:04,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 519 flow [2024-11-24 01:30:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:30:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:30:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-11-24 01:30:04,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-11-24 01:30:04,344 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 196 flow. Second operand 7 states and 82 transitions. [2024-11-24 01:30:04,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 519 flow [2024-11-24 01:30:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 478 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-24 01:30:04,358 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 293 flow [2024-11-24 01:30:04,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-24 01:30:04,361 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-11-24 01:30:04,362 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 293 flow [2024-11-24 01:30:04,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:04,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:04,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:04,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:04,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:04,567 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:04,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1843607445, now seen corresponding path program 4 times [2024-11-24 01:30:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505968986] [2024-11-24 01:30:04,569 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:04,588 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:04,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:04,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:04,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505968986] [2024-11-24 01:30:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505968986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:04,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778403575] [2024-11-24 01:30:04,705 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:04,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:04,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:04,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:30:04,814 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:04,814 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:04,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:30:04,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:04,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778403575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:05,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-24 01:30:05,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073760828] [2024-11-24 01:30:05,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:05,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:30:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:05,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:30:05,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:30:05,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:05,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 293 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:05,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:05,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:05,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:06,053 INFO L124 PetriNetUnfolderBase]: 1176/1759 cut-off events. [2024-11-24 01:30:06,053 INFO L125 PetriNetUnfolderBase]: For 5262/5262 co-relation queries the response was YES. [2024-11-24 01:30:06,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 1759 events. 1176/1759 cut-off events. For 5262/5262 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7613 event pairs, 250 based on Foata normal form. 6/1764 useless extension candidates. Maximal degree in co-relation 6705. Up to 615 conditions per place. [2024-11-24 01:30:06,072 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 156 selfloop transitions, 47 changer transitions 0/204 dead transitions. [2024-11-24 01:30:06,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 204 transitions, 1745 flow [2024-11-24 01:30:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:30:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:30:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 199 transitions. [2024-11-24 01:30:06,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2024-11-24 01:30:06,075 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 293 flow. Second operand 17 states and 199 transitions. [2024-11-24 01:30:06,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 204 transitions, 1745 flow [2024-11-24 01:30:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 204 transitions, 1587 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-11-24 01:30:06,097 INFO L231 Difference]: Finished difference. Result has 73 places, 92 transitions, 870 flow [2024-11-24 01:30:06,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=870, PETRI_PLACES=73, PETRI_TRANSITIONS=92} [2024-11-24 01:30:06,098 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-11-24 01:30:06,098 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 92 transitions, 870 flow [2024-11-24 01:30:06,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:06,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:06,099 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:06,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:30:06,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:06,300 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:06,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2074330033, now seen corresponding path program 1 times [2024-11-24 01:30:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:06,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947387451] [2024-11-24 01:30:06,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:06,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:06,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947387451] [2024-11-24 01:30:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947387451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:06,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339603240] [2024-11-24 01:30:06,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:06,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:06,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:06,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:30:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:06,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:30:06,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:06,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:06,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339603240] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:06,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:06,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-24 01:30:06,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707119656] [2024-11-24 01:30:06,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:06,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:30:06,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:06,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:30:06,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:30:06,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:06,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 92 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:06,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:06,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:06,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:07,146 INFO L124 PetriNetUnfolderBase]: 934/1388 cut-off events. [2024-11-24 01:30:07,146 INFO L125 PetriNetUnfolderBase]: For 9031/9031 co-relation queries the response was YES. [2024-11-24 01:30:07,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 1388 events. 934/1388 cut-off events. For 9031/9031 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5570 event pairs, 366 based on Foata normal form. 74/1461 useless extension candidates. Maximal degree in co-relation 6732. Up to 1134 conditions per place. [2024-11-24 01:30:07,165 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 110 selfloop transitions, 5 changer transitions 0/116 dead transitions. [2024-11-24 01:30:07,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 116 transitions, 1305 flow [2024-11-24 01:30:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:30:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:30:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-24 01:30:07,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-11-24 01:30:07,167 INFO L175 Difference]: Start difference. First operand has 73 places, 92 transitions, 870 flow. Second operand 5 states and 56 transitions. [2024-11-24 01:30:07,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 116 transitions, 1305 flow [2024-11-24 01:30:07,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 1245 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-11-24 01:30:07,207 INFO L231 Difference]: Finished difference. Result has 77 places, 91 transitions, 815 flow [2024-11-24 01:30:07,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=77, PETRI_TRANSITIONS=91} [2024-11-24 01:30:07,209 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-11-24 01:30:07,210 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 91 transitions, 815 flow [2024-11-24 01:30:07,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:07,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:07,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:07,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:30:07,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:07,415 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:07,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1204117753, now seen corresponding path program 5 times [2024-11-24 01:30:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136313379] [2024-11-24 01:30:07,416 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:30:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:07,444 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:07,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:07,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136313379] [2024-11-24 01:30:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136313379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116656563] [2024-11-24 01:30:07,608 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:30:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:07,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:07,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:30:07,721 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:07,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:07,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:30:07,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:07,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:08,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116656563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:08,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:08,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-24 01:30:08,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324216256] [2024-11-24 01:30:08,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:08,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:30:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:08,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:30:08,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:30:08,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:08,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 91 transitions, 815 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 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) [2024-11-24 01:30:08,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:08,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:08,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:09,275 INFO L124 PetriNetUnfolderBase]: 1168/1756 cut-off events. [2024-11-24 01:30:09,275 INFO L125 PetriNetUnfolderBase]: For 12421/12421 co-relation queries the response was YES. [2024-11-24 01:30:09,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8657 conditions, 1756 events. 1168/1756 cut-off events. For 12421/12421 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7410 event pairs, 237 based on Foata normal form. 14/1769 useless extension candidates. Maximal degree in co-relation 8615. Up to 754 conditions per place. [2024-11-24 01:30:09,298 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 115 selfloop transitions, 122 changer transitions 0/238 dead transitions. [2024-11-24 01:30:09,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 238 transitions, 2407 flow [2024-11-24 01:30:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 01:30:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-24 01:30:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 196 transitions. [2024-11-24 01:30:09,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40329218106995884 [2024-11-24 01:30:09,301 INFO L175 Difference]: Start difference. First operand has 77 places, 91 transitions, 815 flow. Second operand 18 states and 196 transitions. [2024-11-24 01:30:09,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 238 transitions, 2407 flow [2024-11-24 01:30:09,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 238 transitions, 2357 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:30:09,344 INFO L231 Difference]: Finished difference. Result has 94 places, 156 transitions, 1885 flow [2024-11-24 01:30:09,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=94, PETRI_TRANSITIONS=156} [2024-11-24 01:30:09,346 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-11-24 01:30:09,346 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 156 transitions, 1885 flow [2024-11-24 01:30:09,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 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) [2024-11-24 01:30:09,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:09,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:09,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:30:09,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:09,551 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:09,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2048539087, now seen corresponding path program 6 times [2024-11-24 01:30:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:09,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23037623] [2024-11-24 01:30:09,553 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:30:09,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:09,583 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:30:09,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23037623] [2024-11-24 01:30:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23037623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310658841] [2024-11-24 01:30:09,825 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:30:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:09,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:09,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:30:09,937 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:30:09,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:09,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:30:09,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:10,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310658841] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:10,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:10,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-24 01:30:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494017492] [2024-11-24 01:30:10,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:10,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:30:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:10,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:30:10,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:30:10,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:10,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 156 transitions, 1885 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:10,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:10,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:10,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:10,741 INFO L124 PetriNetUnfolderBase]: 1144/1696 cut-off events. [2024-11-24 01:30:10,741 INFO L125 PetriNetUnfolderBase]: For 14208/14208 co-relation queries the response was YES. [2024-11-24 01:30:10,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9550 conditions, 1696 events. 1144/1696 cut-off events. For 14208/14208 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7023 event pairs, 332 based on Foata normal form. 20/1716 useless extension candidates. Maximal degree in co-relation 9503. Up to 1282 conditions per place. [2024-11-24 01:30:10,763 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 130 selfloop transitions, 66 changer transitions 0/197 dead transitions. [2024-11-24 01:30:10,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 197 transitions, 2578 flow [2024-11-24 01:30:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:30:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:30:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-11-24 01:30:10,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-24 01:30:10,765 INFO L175 Difference]: Start difference. First operand has 94 places, 156 transitions, 1885 flow. Second operand 8 states and 90 transitions. [2024-11-24 01:30:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 197 transitions, 2578 flow [2024-11-24 01:30:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 197 transitions, 2149 flow, removed 148 selfloop flow, removed 7 redundant places. [2024-11-24 01:30:10,871 INFO L231 Difference]: Finished difference. Result has 95 places, 162 transitions, 1705 flow [2024-11-24 01:30:10,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=95, PETRI_TRANSITIONS=162} [2024-11-24 01:30:10,872 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-11-24 01:30:10,872 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 162 transitions, 1705 flow [2024-11-24 01:30:10,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:10,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:10,873 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:10,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:11,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:11,074 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:11,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1231065147, now seen corresponding path program 7 times [2024-11-24 01:30:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:11,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072304220] [2024-11-24 01:30:11,075 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:30:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:11,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:11,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072304220] [2024-11-24 01:30:11,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072304220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:11,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025210148] [2024-11-24 01:30:11,306 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:30:11,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:11,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:11,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:30:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:11,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:30:11,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:11,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025210148] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:11,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:30:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-24 01:30:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070438509] [2024-11-24 01:30:11,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:30:11,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:30:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:11,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:30:11,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:30:11,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:11,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 162 transitions, 1705 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:11,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:11,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:11,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:12,195 INFO L124 PetriNetUnfolderBase]: 1120/1636 cut-off events. [2024-11-24 01:30:12,195 INFO L125 PetriNetUnfolderBase]: For 7801/7801 co-relation queries the response was YES. [2024-11-24 01:30:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8286 conditions, 1636 events. 1120/1636 cut-off events. For 7801/7801 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6469 event pairs, 256 based on Foata normal form. 20/1656 useless extension candidates. Maximal degree in co-relation 8240. Up to 756 conditions per place. [2024-11-24 01:30:12,212 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 88 selfloop transitions, 90 changer transitions 0/179 dead transitions. [2024-11-24 01:30:12,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 179 transitions, 2100 flow [2024-11-24 01:30:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:30:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:30:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-24 01:30:12,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-24 01:30:12,214 INFO L175 Difference]: Start difference. First operand has 95 places, 162 transitions, 1705 flow. Second operand 7 states and 81 transitions. [2024-11-24 01:30:12,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 179 transitions, 2100 flow [2024-11-24 01:30:12,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 179 transitions, 1958 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-24 01:30:12,254 INFO L231 Difference]: Finished difference. Result has 91 places, 155 transitions, 1649 flow [2024-11-24 01:30:12,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1649, PETRI_PLACES=91, PETRI_TRANSITIONS=155} [2024-11-24 01:30:12,255 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-11-24 01:30:12,255 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 155 transitions, 1649 flow [2024-11-24 01:30:12,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:12,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:12,256 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:12,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:12,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:12,460 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:12,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1745369133, now seen corresponding path program 1 times [2024-11-24 01:30:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:12,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056101382] [2024-11-24 01:30:12,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056101382] [2024-11-24 01:30:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056101382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893687175] [2024-11-24 01:30:13,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:13,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:13,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:13,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:13,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:30:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:13,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:30:13,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:14,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:30:14,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:14,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:15,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-24 01:30:15,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:15,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-24 01:30:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:16,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893687175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:16,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:16,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-24 01:30:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494523130] [2024-11-24 01:30:16,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:16,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:30:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:16,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:30:16,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:30:16,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:16,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 155 transitions, 1649 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:30:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:19,450 INFO L124 PetriNetUnfolderBase]: 1806/2644 cut-off events. [2024-11-24 01:30:19,450 INFO L125 PetriNetUnfolderBase]: For 11721/11721 co-relation queries the response was YES. [2024-11-24 01:30:19,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13473 conditions, 2644 events. 1806/2644 cut-off events. For 11721/11721 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11821 event pairs, 161 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 12991. Up to 1796 conditions per place. [2024-11-24 01:30:19,485 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 259 selfloop transitions, 128 changer transitions 3/391 dead transitions. [2024-11-24 01:30:19,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 391 transitions, 4716 flow [2024-11-24 01:30:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:30:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-24 01:30:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 168 transitions. [2024-11-24 01:30:19,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-24 01:30:19,487 INFO L175 Difference]: Start difference. First operand has 91 places, 155 transitions, 1649 flow. Second operand 12 states and 168 transitions. [2024-11-24 01:30:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 391 transitions, 4716 flow [2024-11-24 01:30:19,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 391 transitions, 4300 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-24 01:30:19,575 INFO L231 Difference]: Finished difference. Result has 103 places, 261 transitions, 2967 flow [2024-11-24 01:30:19,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2967, PETRI_PLACES=103, PETRI_TRANSITIONS=261} [2024-11-24 01:30:19,576 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2024-11-24 01:30:19,576 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 261 transitions, 2967 flow [2024-11-24 01:30:19,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:30:19,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:19,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:19,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:30:19,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 01:30:19,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:19,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1376276702, now seen corresponding path program 1 times [2024-11-24 01:30:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314405243] [2024-11-24 01:30:19,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314405243] [2024-11-24 01:30:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314405243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727397063] [2024-11-24 01:30:20,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:30:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:20,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:20,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:30:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:30:20,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:30:20,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:20,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:20,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:20,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:20,933 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 28 treesize of output 21 [2024-11-24 01:30:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:21,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727397063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:21,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:21,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-11-24 01:30:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141207321] [2024-11-24 01:30:21,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:21,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:30:21,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:21,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:30:21,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:30:21,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:21,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 261 transitions, 2967 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:21,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:21,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:22,399 INFO L124 PetriNetUnfolderBase]: 2340/3406 cut-off events. [2024-11-24 01:30:22,399 INFO L125 PetriNetUnfolderBase]: For 16273/16273 co-relation queries the response was YES. [2024-11-24 01:30:22,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 3406 events. 2340/3406 cut-off events. For 16273/16273 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15727 event pairs, 283 based on Foata normal form. 4/3410 useless extension candidates. Maximal degree in co-relation 18358. Up to 2577 conditions per place. [2024-11-24 01:30:22,433 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 267 selfloop transitions, 139 changer transitions 1/408 dead transitions. [2024-11-24 01:30:22,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 408 transitions, 5254 flow [2024-11-24 01:30:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:30:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:30:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-11-24 01:30:22,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-24 01:30:22,435 INFO L175 Difference]: Start difference. First operand has 103 places, 261 transitions, 2967 flow. Second operand 9 states and 114 transitions. [2024-11-24 01:30:22,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 408 transitions, 5254 flow [2024-11-24 01:30:22,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 408 transitions, 5027 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-11-24 01:30:22,563 INFO L231 Difference]: Finished difference. Result has 113 places, 341 transitions, 4155 flow [2024-11-24 01:30:22,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4155, PETRI_PLACES=113, PETRI_TRANSITIONS=341} [2024-11-24 01:30:22,564 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2024-11-24 01:30:22,564 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 341 transitions, 4155 flow [2024-11-24 01:30:22,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:22,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:22,565 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:22,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:30:22,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 01:30:22,769 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:22,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1423860499, now seen corresponding path program 2 times [2024-11-24 01:30:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:22,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877580048] [2024-11-24 01:30:22,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:22,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:22,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:22,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:23,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877580048] [2024-11-24 01:30:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877580048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088658432] [2024-11-24 01:30:23,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:23,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:23,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:23,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:30:23,725 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:23,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:23,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:30:23,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:23,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:30:24,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:24,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088658432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:24,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:24,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-24 01:30:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206735170] [2024-11-24 01:30:24,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:24,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:30:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:24,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:30:24,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:30:24,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:24,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 341 transitions, 4155 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:24,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:24,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:24,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:26,958 INFO L124 PetriNetUnfolderBase]: 2617/3816 cut-off events. [2024-11-24 01:30:26,958 INFO L125 PetriNetUnfolderBase]: For 20849/20849 co-relation queries the response was YES. [2024-11-24 01:30:26,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 3816 events. 2617/3816 cut-off events. For 20849/20849 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18193 event pairs, 267 based on Foata normal form. 2/3818 useless extension candidates. Maximal degree in co-relation 22161. Up to 3116 conditions per place. [2024-11-24 01:30:27,009 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 352 selfloop transitions, 178 changer transitions 2/533 dead transitions. [2024-11-24 01:30:27,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 533 transitions, 6995 flow [2024-11-24 01:30:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 01:30:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-24 01:30:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 262 transitions. [2024-11-24 01:30:27,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4219001610305958 [2024-11-24 01:30:27,013 INFO L175 Difference]: Start difference. First operand has 113 places, 341 transitions, 4155 flow. Second operand 23 states and 262 transitions. [2024-11-24 01:30:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 533 transitions, 6995 flow [2024-11-24 01:30:27,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 533 transitions, 6872 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-11-24 01:30:27,223 INFO L231 Difference]: Finished difference. Result has 147 places, 425 transitions, 5709 flow [2024-11-24 01:30:27,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5709, PETRI_PLACES=147, PETRI_TRANSITIONS=425} [2024-11-24 01:30:27,224 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2024-11-24 01:30:27,225 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 425 transitions, 5709 flow [2024-11-24 01:30:27,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:27,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:27,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:27,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:30:27,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 01:30:27,427 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:27,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 317267006, now seen corresponding path program 2 times [2024-11-24 01:30:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235627701] [2024-11-24 01:30:27,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:27,469 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:27,469 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:28,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:28,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235627701] [2024-11-24 01:30:28,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235627701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:28,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061346397] [2024-11-24 01:30:28,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:30:28,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:28,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:28,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:30:28,140 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:30:28,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:28,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 01:30:28,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:28,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:28,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:28,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:28,596 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 24 treesize of output 21 [2024-11-24 01:30:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061346397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:28,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-24 01:30:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992353586] [2024-11-24 01:30:28,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:28,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:30:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:28,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:30:28,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:30:28,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 425 transitions, 5709 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:30,182 INFO L124 PetriNetUnfolderBase]: 3409/4970 cut-off events. [2024-11-24 01:30:30,182 INFO L125 PetriNetUnfolderBase]: For 32266/32266 co-relation queries the response was YES. [2024-11-24 01:30:30,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31424 conditions, 4970 events. 3409/4970 cut-off events. For 32266/32266 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 24866 event pairs, 197 based on Foata normal form. 4/4974 useless extension candidates. Maximal degree in co-relation 31090. Up to 3108 conditions per place. [2024-11-24 01:30:30,236 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 324 selfloop transitions, 313 changer transitions 1/639 dead transitions. [2024-11-24 01:30:30,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 639 transitions, 9473 flow [2024-11-24 01:30:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:30:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:30:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-11-24 01:30:30,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-11-24 01:30:30,238 INFO L175 Difference]: Start difference. First operand has 147 places, 425 transitions, 5709 flow. Second operand 9 states and 123 transitions. [2024-11-24 01:30:30,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 639 transitions, 9473 flow [2024-11-24 01:30:30,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 639 transitions, 9212 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-11-24 01:30:30,598 INFO L231 Difference]: Finished difference. Result has 152 places, 529 transitions, 7842 flow [2024-11-24 01:30:30,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7842, PETRI_PLACES=152, PETRI_TRANSITIONS=529} [2024-11-24 01:30:30,601 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2024-11-24 01:30:30,602 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 529 transitions, 7842 flow [2024-11-24 01:30:30,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:30,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:30,602 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:30,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:30:30,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:30:30,806 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:30,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash -91333571, now seen corresponding path program 3 times [2024-11-24 01:30:30,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:30,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852288122] [2024-11-24 01:30:30,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:30,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:30,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:30,833 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852288122] [2024-11-24 01:30:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852288122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993501995] [2024-11-24 01:30:31,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:31,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:31,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:31,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:31,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:30:31,759 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:31,760 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:31,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:30:31,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:31,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:30:32,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:32,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993501995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:32,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:32,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-24 01:30:32,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159481827] [2024-11-24 01:30:32,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:32,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:30:32,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:32,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:30:32,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:30:32,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:32,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 529 transitions, 7842 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:32,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:32,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:32,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:35,026 INFO L124 PetriNetUnfolderBase]: 3511/5123 cut-off events. [2024-11-24 01:30:35,028 INFO L125 PetriNetUnfolderBase]: For 39707/39707 co-relation queries the response was YES. [2024-11-24 01:30:35,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35138 conditions, 5123 events. 3511/5123 cut-off events. For 39707/39707 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25846 event pairs, 389 based on Foata normal form. 1/5124 useless extension candidates. Maximal degree in co-relation 34784. Up to 4536 conditions per place. [2024-11-24 01:30:35,076 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 451 selfloop transitions, 185 changer transitions 1/638 dead transitions. [2024-11-24 01:30:35,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 638 transitions, 10072 flow [2024-11-24 01:30:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 01:30:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-24 01:30:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 259 transitions. [2024-11-24 01:30:35,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39969135802469136 [2024-11-24 01:30:35,078 INFO L175 Difference]: Start difference. First operand has 152 places, 529 transitions, 7842 flow. Second operand 24 states and 259 transitions. [2024-11-24 01:30:35,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 638 transitions, 10072 flow [2024-11-24 01:30:35,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 638 transitions, 9661 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-11-24 01:30:35,514 INFO L231 Difference]: Finished difference. Result has 176 places, 561 transitions, 8352 flow [2024-11-24 01:30:35,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8352, PETRI_PLACES=176, PETRI_TRANSITIONS=561} [2024-11-24 01:30:35,515 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2024-11-24 01:30:35,515 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 561 transitions, 8352 flow [2024-11-24 01:30:35,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:35,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:35,516 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:35,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:35,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-24 01:30:35,716 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:35,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1077402396, now seen corresponding path program 3 times [2024-11-24 01:30:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:35,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896576050] [2024-11-24 01:30:35,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:35,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:35,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:35,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:36,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896576050] [2024-11-24 01:30:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896576050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146990848] [2024-11-24 01:30:36,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:30:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:36,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:36,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:30:36,272 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:30:36,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:36,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 01:30:36,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:36,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:36,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:36,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:36,593 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 28 treesize of output 21 [2024-11-24 01:30:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:37,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146990848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:37,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:37,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-24 01:30:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896236347] [2024-11-24 01:30:37,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:37,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:30:37,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:37,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:30:37,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:30:37,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:37,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 561 transitions, 8352 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:37,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:37,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:37,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:38,169 INFO L124 PetriNetUnfolderBase]: 3762/5487 cut-off events. [2024-11-24 01:30:38,170 INFO L125 PetriNetUnfolderBase]: For 41584/41584 co-relation queries the response was YES. [2024-11-24 01:30:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 5487 events. 3762/5487 cut-off events. For 41584/41584 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28030 event pairs, 428 based on Foata normal form. 4/5491 useless extension candidates. Maximal degree in co-relation 36982. Up to 4835 conditions per place. [2024-11-24 01:30:38,229 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 473 selfloop transitions, 157 changer transitions 1/632 dead transitions. [2024-11-24 01:30:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 632 transitions, 10345 flow [2024-11-24 01:30:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:30:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:30:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-11-24 01:30:38,231 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2024-11-24 01:30:38,231 INFO L175 Difference]: Start difference. First operand has 176 places, 561 transitions, 8352 flow. Second operand 9 states and 115 transitions. [2024-11-24 01:30:38,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 632 transitions, 10345 flow [2024-11-24 01:30:38,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 632 transitions, 10116 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-11-24 01:30:38,662 INFO L231 Difference]: Finished difference. Result has 180 places, 574 transitions, 8685 flow [2024-11-24 01:30:38,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8123, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8685, PETRI_PLACES=180, PETRI_TRANSITIONS=574} [2024-11-24 01:30:38,663 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-11-24 01:30:38,663 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 574 transitions, 8685 flow [2024-11-24 01:30:38,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:30:38,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:38,663 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:38,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 01:30:38,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:30:38,864 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:38,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1726069988, now seen corresponding path program 4 times [2024-11-24 01:30:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044478650] [2024-11-24 01:30:38,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:38,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:38,878 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:38,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:39,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044478650] [2024-11-24 01:30:39,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044478650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781036881] [2024-11-24 01:30:39,083 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:39,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:39,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:30:39,173 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:39,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:39,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:30:39,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:39,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:39,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:39,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:39,478 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 28 treesize of output 21 [2024-11-24 01:30:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781036881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:39,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2024-11-24 01:30:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467132649] [2024-11-24 01:30:39,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:39,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:30:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:39,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:30:39,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:30:39,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:39,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 574 transitions, 8685 flow. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 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) [2024-11-24 01:30:39,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:39,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:39,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:30:40,977 INFO L124 PetriNetUnfolderBase]: 3965/5786 cut-off events. [2024-11-24 01:30:40,977 INFO L125 PetriNetUnfolderBase]: For 46259/46259 co-relation queries the response was YES. [2024-11-24 01:30:40,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39979 conditions, 5786 events. 3965/5786 cut-off events. For 46259/46259 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29844 event pairs, 479 based on Foata normal form. 4/5790 useless extension candidates. Maximal degree in co-relation 39604. Up to 4913 conditions per place. [2024-11-24 01:30:41,009 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 473 selfloop transitions, 191 changer transitions 1/666 dead transitions. [2024-11-24 01:30:41,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 666 transitions, 11037 flow [2024-11-24 01:30:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:30:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:30:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-11-24 01:30:41,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-24 01:30:41,011 INFO L175 Difference]: Start difference. First operand has 180 places, 574 transitions, 8685 flow. Second operand 7 states and 108 transitions. [2024-11-24 01:30:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 666 transitions, 11037 flow [2024-11-24 01:30:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 666 transitions, 10766 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-11-24 01:30:41,385 INFO L231 Difference]: Finished difference. Result has 183 places, 591 transitions, 9177 flow [2024-11-24 01:30:41,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8414, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9177, PETRI_PLACES=183, PETRI_TRANSITIONS=591} [2024-11-24 01:30:41,386 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2024-11-24 01:30:41,386 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 591 transitions, 9177 flow [2024-11-24 01:30:41,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 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) [2024-11-24 01:30:41,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:30:41,386 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:30:41,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:30:41,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:41,587 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:30:41,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:30:41,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1513491251, now seen corresponding path program 4 times [2024-11-24 01:30:41,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:30:41,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778464810] [2024-11-24 01:30:41,588 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:41,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:30:41,620 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:41,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:30:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:30:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778464810] [2024-11-24 01:30:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778464810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:30:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639605560] [2024-11-24 01:30:42,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:30:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:30:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:30:42,024 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:30:42,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:30:42,117 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:30:42,117 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:30:42,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-24 01:30:42,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:30:42,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:30:42,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:30:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:42,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:30:42,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-24 01:30:42,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:30:42,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-24 01:30:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:30:59,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639605560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:30:59,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:30:59,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-24 01:30:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421013496] [2024-11-24 01:30:59,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:30:59,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:30:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:30:59,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:30:59,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:30:59,390 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:30:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 591 transitions, 9177 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:30:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:30:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:30:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:02,172 INFO L124 PetriNetUnfolderBase]: 4626/6722 cut-off events. [2024-11-24 01:31:02,172 INFO L125 PetriNetUnfolderBase]: For 59370/59370 co-relation queries the response was YES. [2024-11-24 01:31:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 6722 events. 4626/6722 cut-off events. For 59370/59370 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35183 event pairs, 509 based on Foata normal form. 4/6726 useless extension candidates. Maximal degree in co-relation 46652. Up to 5372 conditions per place. [2024-11-24 01:31:02,215 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 503 selfloop transitions, 296 changer transitions 5/805 dead transitions. [2024-11-24 01:31:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 805 transitions, 13212 flow [2024-11-24 01:31:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 01:31:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-24 01:31:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 317 transitions. [2024-11-24 01:31:02,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4515669515669516 [2024-11-24 01:31:02,217 INFO L175 Difference]: Start difference. First operand has 183 places, 591 transitions, 9177 flow. Second operand 26 states and 317 transitions. [2024-11-24 01:31:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 805 transitions, 13212 flow [2024-11-24 01:31:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 805 transitions, 12674 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-11-24 01:31:02,778 INFO L231 Difference]: Finished difference. Result has 217 places, 704 transitions, 11168 flow [2024-11-24 01:31:02,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8696, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11168, PETRI_PLACES=217, PETRI_TRANSITIONS=704} [2024-11-24 01:31:02,778 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-11-24 01:31:02,778 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 704 transitions, 11168 flow [2024-11-24 01:31:02,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:31:02,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:02,779 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:02,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 01:31:02,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:02,979 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:02,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -424512978, now seen corresponding path program 5 times [2024-11-24 01:31:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:02,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673198679] [2024-11-24 01:31:02,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:02,998 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:02,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:03,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673198679] [2024-11-24 01:31:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673198679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384648062] [2024-11-24 01:31:03,269 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:03,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:03,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:03,272 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:03,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:31:03,357 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:03,357 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:03,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-24 01:31:03,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:03,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:31:03,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:31:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:03,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384648062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:03,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:03,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-11-24 01:31:03,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013018195] [2024-11-24 01:31:03,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:03,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:31:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:03,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:31:03,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:31:03,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:03,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 704 transitions, 11168 flow. Second operand has 17 states, 17 states have (on average 7.705882352941177) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:03,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:03,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:05,715 INFO L124 PetriNetUnfolderBase]: 4845/7046 cut-off events. [2024-11-24 01:31:05,715 INFO L125 PetriNetUnfolderBase]: For 71903/71903 co-relation queries the response was YES. [2024-11-24 01:31:05,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51670 conditions, 7046 events. 4845/7046 cut-off events. For 71903/71903 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37276 event pairs, 614 based on Foata normal form. 4/7050 useless extension candidates. Maximal degree in co-relation 51232. Up to 6418 conditions per place. [2024-11-24 01:31:05,779 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 575 selfloop transitions, 179 changer transitions 1/756 dead transitions. [2024-11-24 01:31:05,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 756 transitions, 13222 flow [2024-11-24 01:31:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:31:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:31:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-11-24 01:31:05,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-24 01:31:05,781 INFO L175 Difference]: Start difference. First operand has 217 places, 704 transitions, 11168 flow. Second operand 8 states and 108 transitions. [2024-11-24 01:31:05,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 756 transitions, 13222 flow [2024-11-24 01:31:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 756 transitions, 12597 flow, removed 309 selfloop flow, removed 3 redundant places. [2024-11-24 01:31:06,769 INFO L231 Difference]: Finished difference. Result has 223 places, 715 transitions, 11179 flow [2024-11-24 01:31:06,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10555, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11179, PETRI_PLACES=223, PETRI_TRANSITIONS=715} [2024-11-24 01:31:06,769 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2024-11-24 01:31:06,770 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 715 transitions, 11179 flow [2024-11-24 01:31:06,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.705882352941177) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:06,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:06,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 01:31:06,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-24 01:31:06,971 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:06,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1075853062, now seen corresponding path program 6 times [2024-11-24 01:31:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896684011] [2024-11-24 01:31:06,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:06,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:06,992 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:06,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:07,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:07,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896684011] [2024-11-24 01:31:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896684011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:07,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036479475] [2024-11-24 01:31:07,547 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:07,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:07,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:07,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:07,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:31:07,649 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:07,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:07,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 01:31:07,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:07,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:31:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:07,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:08,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:31:08,109 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 24 treesize of output 21 [2024-11-24 01:31:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036479475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:08,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:08,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-24 01:31:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818201731] [2024-11-24 01:31:08,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:08,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:31:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:08,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:31:08,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:31:08,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:08,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 715 transitions, 11179 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:08,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:08,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:08,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:10,537 INFO L124 PetriNetUnfolderBase]: 5116/7442 cut-off events. [2024-11-24 01:31:10,537 INFO L125 PetriNetUnfolderBase]: For 75345/75345 co-relation queries the response was YES. [2024-11-24 01:31:10,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53368 conditions, 7442 events. 5116/7442 cut-off events. For 75345/75345 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39785 event pairs, 559 based on Foata normal form. 4/7446 useless extension candidates. Maximal degree in co-relation 52921. Up to 6624 conditions per place. [2024-11-24 01:31:10,653 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 582 selfloop transitions, 190 changer transitions 1/774 dead transitions. [2024-11-24 01:31:10,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 774 transitions, 13369 flow [2024-11-24 01:31:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:31:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:31:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-11-24 01:31:10,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-11-24 01:31:10,654 INFO L175 Difference]: Start difference. First operand has 223 places, 715 transitions, 11179 flow. Second operand 9 states and 113 transitions. [2024-11-24 01:31:10,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 774 transitions, 13369 flow [2024-11-24 01:31:11,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 774 transitions, 13111 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-11-24 01:31:11,486 INFO L231 Difference]: Finished difference. Result has 231 places, 732 transitions, 11722 flow [2024-11-24 01:31:11,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11722, PETRI_PLACES=231, PETRI_TRANSITIONS=732} [2024-11-24 01:31:11,488 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2024-11-24 01:31:11,488 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 732 transitions, 11722 flow [2024-11-24 01:31:11,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:11,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:11,488 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:11,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 01:31:11,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-24 01:31:11,689 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:11,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1651563195, now seen corresponding path program 5 times [2024-11-24 01:31:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463107026] [2024-11-24 01:31:11,690 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:11,729 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:11,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:12,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:12,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463107026] [2024-11-24 01:31:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463107026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017666717] [2024-11-24 01:31:12,095 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:12,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:12,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:12,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:31:12,200 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:12,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:12,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-24 01:31:12,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:12,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:31:12,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:31:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:12,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:12,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-24 01:31:12,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:31:12,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-24 01:31:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:13,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017666717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:13,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:13,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-24 01:31:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300325187] [2024-11-24 01:31:13,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:13,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:31:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:13,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:31:13,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:31:13,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:13,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 732 transitions, 11722 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:31:13,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:13,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:13,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:15,744 INFO L124 PetriNetUnfolderBase]: 5283/7689 cut-off events. [2024-11-24 01:31:15,744 INFO L125 PetriNetUnfolderBase]: For 81466/81466 co-relation queries the response was YES. [2024-11-24 01:31:15,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55406 conditions, 7689 events. 5283/7689 cut-off events. For 81466/81466 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 41438 event pairs, 740 based on Foata normal form. 2/7691 useless extension candidates. Maximal degree in co-relation 54949. Up to 6892 conditions per place. [2024-11-24 01:31:15,806 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 608 selfloop transitions, 191 changer transitions 2/802 dead transitions. [2024-11-24 01:31:15,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 802 transitions, 14021 flow [2024-11-24 01:31:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 01:31:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-24 01:31:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-11-24 01:31:15,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-11-24 01:31:15,808 INFO L175 Difference]: Start difference. First operand has 231 places, 732 transitions, 11722 flow. Second operand 14 states and 172 transitions. [2024-11-24 01:31:15,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 802 transitions, 14021 flow [2024-11-24 01:31:16,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 802 transitions, 13645 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-11-24 01:31:16,518 INFO L231 Difference]: Finished difference. Result has 244 places, 755 transitions, 12189 flow [2024-11-24 01:31:16,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12189, PETRI_PLACES=244, PETRI_TRANSITIONS=755} [2024-11-24 01:31:16,518 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2024-11-24 01:31:16,519 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 755 transitions, 12189 flow [2024-11-24 01:31:16,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 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) [2024-11-24 01:31:16,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:16,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:16,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 01:31:16,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:16,719 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:16,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1543743351, now seen corresponding path program 6 times [2024-11-24 01:31:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224941063] [2024-11-24 01:31:16,720 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:16,735 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:16,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224941063] [2024-11-24 01:31:17,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224941063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194957205] [2024-11-24 01:31:17,266 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:17,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:17,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 01:31:17,361 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:17,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:17,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:31:17,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:17,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:31:17,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:31:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:31:17,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:18,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194957205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:18,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:18,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-24 01:31:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243768350] [2024-11-24 01:31:18,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:18,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:31:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:18,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:31:18,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:31:18,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:18,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 755 transitions, 12189 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:20,971 INFO L124 PetriNetUnfolderBase]: 5520/8024 cut-off events. [2024-11-24 01:31:20,971 INFO L125 PetriNetUnfolderBase]: For 83462/83462 co-relation queries the response was YES. [2024-11-24 01:31:21,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58186 conditions, 8024 events. 5520/8024 cut-off events. For 83462/83462 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 43243 event pairs, 682 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 57712. Up to 7272 conditions per place. [2024-11-24 01:31:21,078 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 616 selfloop transitions, 232 changer transitions 2/851 dead transitions. [2024-11-24 01:31:21,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 851 transitions, 14724 flow [2024-11-24 01:31:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 01:31:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-24 01:31:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 318 transitions. [2024-11-24 01:31:21,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-11-24 01:31:21,081 INFO L175 Difference]: Start difference. First operand has 244 places, 755 transitions, 12189 flow. Second operand 30 states and 318 transitions. [2024-11-24 01:31:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 851 transitions, 14724 flow [2024-11-24 01:31:22,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 851 transitions, 14397 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-11-24 01:31:22,188 INFO L231 Difference]: Finished difference. Result has 275 places, 775 transitions, 12753 flow [2024-11-24 01:31:22,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11919, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12753, PETRI_PLACES=275, PETRI_TRANSITIONS=775} [2024-11-24 01:31:22,189 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 246 predicate places. [2024-11-24 01:31:22,189 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 775 transitions, 12753 flow [2024-11-24 01:31:22,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:22,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:22,190 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:22,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-24 01:31:22,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:22,394 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:22,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1135025986, now seen corresponding path program 7 times [2024-11-24 01:31:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:22,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127477316] [2024-11-24 01:31:22,395 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:31:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127477316] [2024-11-24 01:31:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127477316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929332733] [2024-11-24 01:31:22,536 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:31:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:22,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:22,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:22,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 01:31:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:22,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:31:22,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:22,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929332733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:22,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-24 01:31:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099241073] [2024-11-24 01:31:22,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:22,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:31:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:22,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:31:22,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:31:22,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:22,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 775 transitions, 12753 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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) [2024-11-24 01:31:22,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:22,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:25,895 INFO L124 PetriNetUnfolderBase]: 6884/9935 cut-off events. [2024-11-24 01:31:25,896 INFO L125 PetriNetUnfolderBase]: For 125474/125474 co-relation queries the response was YES. [2024-11-24 01:31:26,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72598 conditions, 9935 events. 6884/9935 cut-off events. For 125474/125474 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 54585 event pairs, 1849 based on Foata normal form. 362/10297 useless extension candidates. Maximal degree in co-relation 72242. Up to 6572 conditions per place. [2024-11-24 01:31:26,079 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 917 selfloop transitions, 67 changer transitions 0/985 dead transitions. [2024-11-24 01:31:26,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 985 transitions, 17461 flow [2024-11-24 01:31:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:31:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:31:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-11-24 01:31:26,081 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-11-24 01:31:26,081 INFO L175 Difference]: Start difference. First operand has 275 places, 775 transitions, 12753 flow. Second operand 8 states and 101 transitions. [2024-11-24 01:31:26,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 985 transitions, 17461 flow [2024-11-24 01:31:27,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 985 transitions, 17054 flow, removed 97 selfloop flow, removed 14 redundant places. [2024-11-24 01:31:27,433 INFO L231 Difference]: Finished difference. Result has 269 places, 751 transitions, 12261 flow [2024-11-24 01:31:27,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11708, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12261, PETRI_PLACES=269, PETRI_TRANSITIONS=751} [2024-11-24 01:31:27,434 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2024-11-24 01:31:27,434 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 751 transitions, 12261 flow [2024-11-24 01:31:27,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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) [2024-11-24 01:31:27,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:27,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:27,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 01:31:27,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:27,639 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:27,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2103439519, now seen corresponding path program 8 times [2024-11-24 01:31:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:27,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651992535] [2024-11-24 01:31:27,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:31:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:27,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:27,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:27,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651992535] [2024-11-24 01:31:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651992535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181599579] [2024-11-24 01:31:27,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:31:27,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:27,735 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:27,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 01:31:27,822 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:27,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:27,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:31:27,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:27,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181599579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:27,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-24 01:31:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90087389] [2024-11-24 01:31:27,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:28,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:31:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:28,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:31:28,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:31:28,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:28,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 751 transitions, 12261 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 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) [2024-11-24 01:31:28,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:28,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:28,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:30,254 INFO L124 PetriNetUnfolderBase]: 5980/8841 cut-off events. [2024-11-24 01:31:30,255 INFO L125 PetriNetUnfolderBase]: For 123370/123370 co-relation queries the response was YES. [2024-11-24 01:31:30,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65756 conditions, 8841 events. 5980/8841 cut-off events. For 123370/123370 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 50341 event pairs, 1443 based on Foata normal form. 498/9339 useless extension candidates. Maximal degree in co-relation 65171. Up to 3351 conditions per place. [2024-11-24 01:31:30,383 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 859 selfloop transitions, 72 changer transitions 0/932 dead transitions. [2024-11-24 01:31:30,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 932 transitions, 16437 flow [2024-11-24 01:31:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:31:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:31:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-11-24 01:31:30,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-11-24 01:31:30,385 INFO L175 Difference]: Start difference. First operand has 269 places, 751 transitions, 12261 flow. Second operand 7 states and 95 transitions. [2024-11-24 01:31:30,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 932 transitions, 16437 flow [2024-11-24 01:31:31,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 16358 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-24 01:31:31,609 INFO L231 Difference]: Finished difference. Result has 271 places, 721 transitions, 12085 flow [2024-11-24 01:31:31,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11716, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12085, PETRI_PLACES=271, PETRI_TRANSITIONS=721} [2024-11-24 01:31:31,610 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 242 predicate places. [2024-11-24 01:31:31,610 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 721 transitions, 12085 flow [2024-11-24 01:31:31,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 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) [2024-11-24 01:31:31,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:31,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:31,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-24 01:31:31,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-24 01:31:31,811 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:31,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1537999053, now seen corresponding path program 7 times [2024-11-24 01:31:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:31,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799676462] [2024-11-24 01:31:31,812 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:31:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799676462] [2024-11-24 01:31:31,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799676462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76844912] [2024-11-24 01:31:31,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:31:31,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:31,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:31,920 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:31,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 01:31:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:32,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:32,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:32,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:32,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76844912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:32,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:32,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-24 01:31:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573306551] [2024-11-24 01:31:32,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:32,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:31:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:32,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:31:32,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:31:32,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:32,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 721 transitions, 12085 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:34,184 INFO L124 PetriNetUnfolderBase]: 5359/8061 cut-off events. [2024-11-24 01:31:34,185 INFO L125 PetriNetUnfolderBase]: For 110414/110414 co-relation queries the response was YES. [2024-11-24 01:31:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61552 conditions, 8061 events. 5359/8061 cut-off events. For 110414/110414 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 46861 event pairs, 1389 based on Foata normal form. 300/8361 useless extension candidates. Maximal degree in co-relation 61035. Up to 3351 conditions per place. [2024-11-24 01:31:34,284 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 746 selfloop transitions, 105 changer transitions 84/936 dead transitions. [2024-11-24 01:31:34,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 936 transitions, 16664 flow [2024-11-24 01:31:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:31:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:31:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-24 01:31:34,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-11-24 01:31:34,285 INFO L175 Difference]: Start difference. First operand has 271 places, 721 transitions, 12085 flow. Second operand 7 states and 94 transitions. [2024-11-24 01:31:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 936 transitions, 16664 flow [2024-11-24 01:31:35,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 936 transitions, 16455 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-11-24 01:31:35,550 INFO L231 Difference]: Finished difference. Result has 274 places, 675 transitions, 11620 flow [2024-11-24 01:31:35,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11898, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11620, PETRI_PLACES=274, PETRI_TRANSITIONS=675} [2024-11-24 01:31:35,551 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 245 predicate places. [2024-11-24 01:31:35,551 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 675 transitions, 11620 flow [2024-11-24 01:31:35,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:35,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:35,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:35,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-24 01:31:35,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-24 01:31:35,752 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:35,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash 723300132, now seen corresponding path program 1 times [2024-11-24 01:31:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767502025] [2024-11-24 01:31:35,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:31:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767502025] [2024-11-24 01:31:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767502025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971693302] [2024-11-24 01:31:35,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:31:35,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:35,858 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:35,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 01:31:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:31:35,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:35,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:36,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971693302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:36,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:36,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-24 01:31:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47267237] [2024-11-24 01:31:36,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:36,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:31:36,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:36,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:31:36,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:31:36,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:36,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 675 transitions, 11620 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 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) [2024-11-24 01:31:36,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:36,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:36,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:38,204 INFO L124 PetriNetUnfolderBase]: 5155/7707 cut-off events. [2024-11-24 01:31:38,204 INFO L125 PetriNetUnfolderBase]: For 112936/112936 co-relation queries the response was YES. [2024-11-24 01:31:38,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60634 conditions, 7707 events. 5155/7707 cut-off events. For 112936/112936 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44015 event pairs, 1178 based on Foata normal form. 123/7830 useless extension candidates. Maximal degree in co-relation 60100. Up to 3351 conditions per place. [2024-11-24 01:31:38,307 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 732 selfloop transitions, 99 changer transitions 60/892 dead transitions. [2024-11-24 01:31:38,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 892 transitions, 15997 flow [2024-11-24 01:31:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:31:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:31:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-11-24 01:31:38,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-24 01:31:38,308 INFO L175 Difference]: Start difference. First operand has 274 places, 675 transitions, 11620 flow. Second operand 10 states and 134 transitions. [2024-11-24 01:31:38,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 892 transitions, 15997 flow [2024-11-24 01:31:39,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 892 transitions, 15882 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-11-24 01:31:39,566 INFO L231 Difference]: Finished difference. Result has 284 places, 665 transitions, 11677 flow [2024-11-24 01:31:39,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11677, PETRI_PLACES=284, PETRI_TRANSITIONS=665} [2024-11-24 01:31:39,572 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 255 predicate places. [2024-11-24 01:31:39,572 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 665 transitions, 11677 flow [2024-11-24 01:31:39,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 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) [2024-11-24 01:31:39,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:39,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:39,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 01:31:39,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 01:31:39,773 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:39,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1259770954, now seen corresponding path program 2 times [2024-11-24 01:31:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:39,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183508625] [2024-11-24 01:31:39,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:31:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:39,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:39,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183508625] [2024-11-24 01:31:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183508625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815911741] [2024-11-24 01:31:39,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:31:39,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:39,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 01:31:39,951 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:39,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:39,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:39,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:40,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815911741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:40,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-24 01:31:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666008801] [2024-11-24 01:31:40,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:40,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:31:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:40,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:31:40,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:31:40,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:40,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 665 transitions, 11677 flow. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:40,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:40,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:40,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:42,362 INFO L124 PetriNetUnfolderBase]: 5193/7621 cut-off events. [2024-11-24 01:31:42,362 INFO L125 PetriNetUnfolderBase]: For 131209/131209 co-relation queries the response was YES. [2024-11-24 01:31:42,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62894 conditions, 7621 events. 5193/7621 cut-off events. For 131209/131209 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41837 event pairs, 1217 based on Foata normal form. 135/7756 useless extension candidates. Maximal degree in co-relation 62320. Up to 3351 conditions per place. [2024-11-24 01:31:42,484 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 740 selfloop transitions, 133 changer transitions 45/919 dead transitions. [2024-11-24 01:31:42,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 919 transitions, 16750 flow [2024-11-24 01:31:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:31:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:31:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-11-24 01:31:42,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4703703703703704 [2024-11-24 01:31:42,485 INFO L175 Difference]: Start difference. First operand has 284 places, 665 transitions, 11677 flow. Second operand 10 states and 127 transitions. [2024-11-24 01:31:42,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 919 transitions, 16750 flow [2024-11-24 01:31:44,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 919 transitions, 16214 flow, removed 99 selfloop flow, removed 10 redundant places. [2024-11-24 01:31:44,255 INFO L231 Difference]: Finished difference. Result has 284 places, 691 transitions, 12043 flow [2024-11-24 01:31:44,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11269, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12043, PETRI_PLACES=284, PETRI_TRANSITIONS=691} [2024-11-24 01:31:44,257 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 255 predicate places. [2024-11-24 01:31:44,259 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 691 transitions, 12043 flow [2024-11-24 01:31:44,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:44,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:44,260 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:44,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-24 01:31:44,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 01:31:44,460 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:44,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash -250325760, now seen corresponding path program 3 times [2024-11-24 01:31:44,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:44,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421861935] [2024-11-24 01:31:44,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:31:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:44,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:31:44,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:44,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421861935] [2024-11-24 01:31:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421861935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357574760] [2024-11-24 01:31:44,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:31:44,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:44,592 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 01:31:44,677 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:31:44,677 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:44,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:44,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:44,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:44,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357574760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:44,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:44,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-24 01:31:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248941253] [2024-11-24 01:31:44,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:44,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:31:44,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:44,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:31:44,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:31:44,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:44,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 691 transitions, 12043 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2024-11-24 01:31:44,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:44,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:47,649 INFO L124 PetriNetUnfolderBase]: 4935/7291 cut-off events. [2024-11-24 01:31:47,649 INFO L125 PetriNetUnfolderBase]: For 131290/131290 co-relation queries the response was YES. [2024-11-24 01:31:47,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61184 conditions, 7291 events. 4935/7291 cut-off events. For 131290/131290 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 40421 event pairs, 1209 based on Foata normal form. 187/7478 useless extension candidates. Maximal degree in co-relation 60559. Up to 3351 conditions per place. [2024-11-24 01:31:47,706 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 722 selfloop transitions, 110 changer transitions 31/864 dead transitions. [2024-11-24 01:31:47,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 864 transitions, 15695 flow [2024-11-24 01:31:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:31:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:31:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-11-24 01:31:47,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-24 01:31:47,708 INFO L175 Difference]: Start difference. First operand has 284 places, 691 transitions, 12043 flow. Second operand 10 states and 125 transitions. [2024-11-24 01:31:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 864 transitions, 15695 flow [2024-11-24 01:31:48,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 864 transitions, 15291 flow, removed 112 selfloop flow, removed 8 redundant places. [2024-11-24 01:31:48,897 INFO L231 Difference]: Finished difference. Result has 283 places, 654 transitions, 11337 flow [2024-11-24 01:31:48,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11337, PETRI_PLACES=283, PETRI_TRANSITIONS=654} [2024-11-24 01:31:48,898 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 254 predicate places. [2024-11-24 01:31:48,898 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 654 transitions, 11337 flow [2024-11-24 01:31:48,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2024-11-24 01:31:48,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:48,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:48,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-24 01:31:49,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:49,099 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:49,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash -194491450, now seen corresponding path program 4 times [2024-11-24 01:31:49,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:49,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661555774] [2024-11-24 01:31:49,100 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:31:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:49,110 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:31:49,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:49,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661555774] [2024-11-24 01:31:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661555774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403687467] [2024-11-24 01:31:49,165 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:31:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:49,167 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:49,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 01:31:49,251 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:31:49,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:49,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:31:49,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:49,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403687467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:49,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-24 01:31:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187961073] [2024-11-24 01:31:49,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:49,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:31:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:49,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:31:49,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:31:49,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:49,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 654 transitions, 11337 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:49,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:49,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:49,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:51,214 INFO L124 PetriNetUnfolderBase]: 5337/7930 cut-off events. [2024-11-24 01:31:51,215 INFO L125 PetriNetUnfolderBase]: For 136475/136475 co-relation queries the response was YES. [2024-11-24 01:31:51,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65111 conditions, 7930 events. 5337/7930 cut-off events. For 136475/136475 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44867 event pairs, 787 based on Foata normal form. 39/7969 useless extension candidates. Maximal degree in co-relation 64488. Up to 3572 conditions per place. [2024-11-24 01:31:51,329 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 642 selfloop transitions, 267 changer transitions 2/912 dead transitions. [2024-11-24 01:31:51,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 912 transitions, 17011 flow [2024-11-24 01:31:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:31:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-24 01:31:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-11-24 01:31:51,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-24 01:31:51,331 INFO L175 Difference]: Start difference. First operand has 283 places, 654 transitions, 11337 flow. Second operand 12 states and 152 transitions. [2024-11-24 01:31:51,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 912 transitions, 17011 flow [2024-11-24 01:31:52,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 912 transitions, 16577 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-11-24 01:31:52,788 INFO L231 Difference]: Finished difference. Result has 295 places, 719 transitions, 13267 flow [2024-11-24 01:31:52,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13267, PETRI_PLACES=295, PETRI_TRANSITIONS=719} [2024-11-24 01:31:52,789 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 266 predicate places. [2024-11-24 01:31:52,789 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 719 transitions, 13267 flow [2024-11-24 01:31:52,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:52,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:52,790 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:52,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 01:31:52,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:52,990 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:52,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1496454694, now seen corresponding path program 5 times [2024-11-24 01:31:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967628688] [2024-11-24 01:31:52,991 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:52,999 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:53,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:53,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967628688] [2024-11-24 01:31:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967628688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794278951] [2024-11-24 01:31:53,079 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:31:53,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:53,083 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:53,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 01:31:53,166 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:31:53,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:53,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:53,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:53,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794278951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:53,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:53,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-24 01:31:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758891133] [2024-11-24 01:31:53,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:53,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:31:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:53,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:31:53,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:31:53,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:53,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 719 transitions, 13267 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:53,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:53,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:53,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:31:55,514 INFO L124 PetriNetUnfolderBase]: 5805/8617 cut-off events. [2024-11-24 01:31:55,514 INFO L125 PetriNetUnfolderBase]: For 173429/173429 co-relation queries the response was YES. [2024-11-24 01:31:55,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74495 conditions, 8617 events. 5805/8617 cut-off events. For 173429/173429 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 49575 event pairs, 984 based on Foata normal form. 219/8836 useless extension candidates. Maximal degree in co-relation 73864. Up to 3491 conditions per place. [2024-11-24 01:31:55,689 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 696 selfloop transitions, 146 changer transitions 34/877 dead transitions. [2024-11-24 01:31:55,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 877 transitions, 17143 flow [2024-11-24 01:31:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:31:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:31:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-11-24 01:31:55,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-11-24 01:31:55,690 INFO L175 Difference]: Start difference. First operand has 295 places, 719 transitions, 13267 flow. Second operand 10 states and 129 transitions. [2024-11-24 01:31:55,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 877 transitions, 17143 flow [2024-11-24 01:31:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 877 transitions, 16921 flow, removed 111 selfloop flow, removed 0 redundant places. [2024-11-24 01:31:57,835 INFO L231 Difference]: Finished difference. Result has 307 places, 745 transitions, 14080 flow [2024-11-24 01:31:57,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13127, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14080, PETRI_PLACES=307, PETRI_TRANSITIONS=745} [2024-11-24 01:31:57,837 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 278 predicate places. [2024-11-24 01:31:57,837 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 745 transitions, 14080 flow [2024-11-24 01:31:57,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:57,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:31:57,837 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:57,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-24 01:31:58,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:58,037 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:31:58,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2028686480, now seen corresponding path program 6 times [2024-11-24 01:31:58,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:58,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190841830] [2024-11-24 01:31:58,038 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:58,047 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:58,048 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:58,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:58,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190841830] [2024-11-24 01:31:58,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190841830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:31:58,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126432478] [2024-11-24 01:31:58,162 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:31:58,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:58,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:58,165 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:58,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 01:31:58,294 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:31:58,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:58,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:31:58,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:58,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:31:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126432478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:31:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-24 01:31:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620351908] [2024-11-24 01:31:58,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:58,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:31:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:58,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:31:58,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:31:58,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:31:58,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 745 transitions, 14080 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:31:58,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:31:58,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:31:58,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:00,926 INFO L124 PetriNetUnfolderBase]: 5433/8145 cut-off events. [2024-11-24 01:32:00,927 INFO L125 PetriNetUnfolderBase]: For 176605/176605 co-relation queries the response was YES. [2024-11-24 01:32:00,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72391 conditions, 8145 events. 5433/8145 cut-off events. For 176605/176605 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 47327 event pairs, 1185 based on Foata normal form. 171/8316 useless extension candidates. Maximal degree in co-relation 71756. Up to 3491 conditions per place. [2024-11-24 01:32:01,010 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 707 selfloop transitions, 98 changer transitions 42/848 dead transitions. [2024-11-24 01:32:01,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 848 transitions, 17214 flow [2024-11-24 01:32:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:32:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:32:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-11-24 01:32:01,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-11-24 01:32:01,012 INFO L175 Difference]: Start difference. First operand has 307 places, 745 transitions, 14080 flow. Second operand 9 states and 113 transitions. [2024-11-24 01:32:01,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 848 transitions, 17214 flow [2024-11-24 01:32:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 848 transitions, 17133 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-11-24 01:32:02,862 INFO L231 Difference]: Finished difference. Result has 316 places, 723 transitions, 13949 flow [2024-11-24 01:32:02,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13595, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13949, PETRI_PLACES=316, PETRI_TRANSITIONS=723} [2024-11-24 01:32:02,863 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2024-11-24 01:32:02,863 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 723 transitions, 13949 flow [2024-11-24 01:32:02,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:02,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:02,864 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:02,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-24 01:32:03,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:03,064 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:03,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1545337226, now seen corresponding path program 7 times [2024-11-24 01:32:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:03,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286016365] [2024-11-24 01:32:03,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:03,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286016365] [2024-11-24 01:32:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286016365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107590419] [2024-11-24 01:32:03,164 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:03,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:03,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:03,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 01:32:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:03,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:32:03,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:03,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107590419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:03,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:03,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-24 01:32:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627534769] [2024-11-24 01:32:03,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:03,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:32:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:03,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:32:03,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:32:03,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:03,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 723 transitions, 13949 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2024-11-24 01:32:03,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:03,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:03,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:06,141 INFO L124 PetriNetUnfolderBase]: 5208/7917 cut-off events. [2024-11-24 01:32:06,142 INFO L125 PetriNetUnfolderBase]: For 179241/179241 co-relation queries the response was YES. [2024-11-24 01:32:06,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70736 conditions, 7917 events. 5208/7917 cut-off events. For 179241/179241 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 46756 event pairs, 1069 based on Foata normal form. 219/8136 useless extension candidates. Maximal degree in co-relation 70278. Up to 3491 conditions per place. [2024-11-24 01:32:06,225 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 677 selfloop transitions, 103 changer transitions 35/816 dead transitions. [2024-11-24 01:32:06,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 816 transitions, 16360 flow [2024-11-24 01:32:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:32:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:32:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-11-24 01:32:06,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-11-24 01:32:06,227 INFO L175 Difference]: Start difference. First operand has 316 places, 723 transitions, 13949 flow. Second operand 10 states and 123 transitions. [2024-11-24 01:32:06,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 816 transitions, 16360 flow [2024-11-24 01:32:07,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 816 transitions, 16147 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-11-24 01:32:07,721 INFO L231 Difference]: Finished difference. Result has 316 places, 683 transitions, 13066 flow [2024-11-24 01:32:07,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12602, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13066, PETRI_PLACES=316, PETRI_TRANSITIONS=683} [2024-11-24 01:32:07,721 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2024-11-24 01:32:07,721 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 683 transitions, 13066 flow [2024-11-24 01:32:07,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2024-11-24 01:32:07,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:07,722 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:07,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-24 01:32:07,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-24 01:32:07,922 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:07,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash -94528403, now seen corresponding path program 9 times [2024-11-24 01:32:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:07,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004571210] [2024-11-24 01:32:07,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:07,932 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:07,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004571210] [2024-11-24 01:32:08,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004571210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390226750] [2024-11-24 01:32:08,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:08,025 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:08,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-24 01:32:08,128 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:08,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:08,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:32:08,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:08,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:32:08,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390226750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:08,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:08,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-24 01:32:08,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843361013] [2024-11-24 01:32:08,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:08,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:32:08,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:08,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:32:08,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:32:08,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:08,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 683 transitions, 13066 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 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) [2024-11-24 01:32:08,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:08,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:08,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:09,823 INFO L124 PetriNetUnfolderBase]: 3173/4820 cut-off events. [2024-11-24 01:32:09,823 INFO L125 PetriNetUnfolderBase]: For 95070/95070 co-relation queries the response was YES. [2024-11-24 01:32:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43674 conditions, 4820 events. 3173/4820 cut-off events. For 95070/95070 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25903 event pairs, 904 based on Foata normal form. 263/5083 useless extension candidates. Maximal degree in co-relation 43552. Up to 3491 conditions per place. [2024-11-24 01:32:09,879 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 425 selfloop transitions, 3 changer transitions 203/632 dead transitions. [2024-11-24 01:32:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 632 transitions, 13434 flow [2024-11-24 01:32:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:32:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:32:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-11-24 01:32:09,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-11-24 01:32:09,880 INFO L175 Difference]: Start difference. First operand has 316 places, 683 transitions, 13066 flow. Second operand 7 states and 87 transitions. [2024-11-24 01:32:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 632 transitions, 13434 flow [2024-11-24 01:32:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 632 transitions, 13028 flow, removed 37 selfloop flow, removed 23 redundant places. [2024-11-24 01:32:10,749 INFO L231 Difference]: Finished difference. Result has 286 places, 429 transitions, 7451 flow [2024-11-24 01:32:10,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11710, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7451, PETRI_PLACES=286, PETRI_TRANSITIONS=429} [2024-11-24 01:32:10,750 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2024-11-24 01:32:10,750 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 429 transitions, 7451 flow [2024-11-24 01:32:10,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 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) [2024-11-24 01:32:10,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:10,750 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:10,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-24 01:32:10,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-24 01:32:10,954 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:10,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1659579774, now seen corresponding path program 10 times [2024-11-24 01:32:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:10,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048737246] [2024-11-24 01:32:10,955 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:32:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:10,962 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:32:10,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048737246] [2024-11-24 01:32:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048737246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385361789] [2024-11-24 01:32:11,025 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:32:11,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:11,027 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:11,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-24 01:32:11,109 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:32:11,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:11,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:32:11,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:11,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:11,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385361789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:11,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-24 01:32:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330381685] [2024-11-24 01:32:11,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:11,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:32:11,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:11,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:32:11,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:32:11,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:11,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 429 transitions, 7451 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:11,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:11,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:12,788 INFO L124 PetriNetUnfolderBase]: 2733/3913 cut-off events. [2024-11-24 01:32:12,788 INFO L125 PetriNetUnfolderBase]: For 72274/72274 co-relation queries the response was YES. [2024-11-24 01:32:12,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 3913 events. 2733/3913 cut-off events. For 72274/72274 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18159 event pairs, 256 based on Foata normal form. 6/3919 useless extension candidates. Maximal degree in co-relation 33919. Up to 1905 conditions per place. [2024-11-24 01:32:12,825 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 447 selfloop transitions, 139 changer transitions 0/587 dead transitions. [2024-11-24 01:32:12,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 587 transitions, 10736 flow [2024-11-24 01:32:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:32:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-24 01:32:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-11-24 01:32:12,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-11-24 01:32:12,826 INFO L175 Difference]: Start difference. First operand has 286 places, 429 transitions, 7451 flow. Second operand 12 states and 147 transitions. [2024-11-24 01:32:12,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 587 transitions, 10736 flow [2024-11-24 01:32:13,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 587 transitions, 9805 flow, removed 313 selfloop flow, removed 24 redundant places. [2024-11-24 01:32:13,227 INFO L231 Difference]: Finished difference. Result has 216 places, 475 transitions, 7930 flow [2024-11-24 01:32:13,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7930, PETRI_PLACES=216, PETRI_TRANSITIONS=475} [2024-11-24 01:32:13,228 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-11-24 01:32:13,228 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 475 transitions, 7930 flow [2024-11-24 01:32:13,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:13,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:13,229 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:13,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-24 01:32:13,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-24 01:32:13,429 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:13,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:13,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1525003783, now seen corresponding path program 8 times [2024-11-24 01:32:13,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:13,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803197305] [2024-11-24 01:32:13,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:32:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:13,439 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:13,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:13,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:13,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803197305] [2024-11-24 01:32:13,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803197305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:13,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533283849] [2024-11-24 01:32:13,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:32:13,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:13,576 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:13,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-24 01:32:13,665 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:13,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:13,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:13,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:13,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533283849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:13,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-24 01:32:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927412859] [2024-11-24 01:32:13,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:13,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:32:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:13,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:32:13,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:32:13,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 475 transitions, 7930 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 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) [2024-11-24 01:32:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:13,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:15,080 INFO L124 PetriNetUnfolderBase]: 3188/4592 cut-off events. [2024-11-24 01:32:15,081 INFO L125 PetriNetUnfolderBase]: For 84746/84746 co-relation queries the response was YES. [2024-11-24 01:32:15,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38690 conditions, 4592 events. 3188/4592 cut-off events. For 84746/84746 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22037 event pairs, 308 based on Foata normal form. 44/4636 useless extension candidates. Maximal degree in co-relation 38589. Up to 1549 conditions per place. [2024-11-24 01:32:15,134 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 513 selfloop transitions, 193 changer transitions 0/707 dead transitions. [2024-11-24 01:32:15,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 707 transitions, 12899 flow [2024-11-24 01:32:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:32:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:32:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-24 01:32:15,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-11-24 01:32:15,135 INFO L175 Difference]: Start difference. First operand has 216 places, 475 transitions, 7930 flow. Second operand 10 states and 109 transitions. [2024-11-24 01:32:15,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 707 transitions, 12899 flow [2024-11-24 01:32:15,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 707 transitions, 12412 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-11-24 01:32:15,742 INFO L231 Difference]: Finished difference. Result has 224 places, 502 transitions, 8708 flow [2024-11-24 01:32:15,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7562, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8708, PETRI_PLACES=224, PETRI_TRANSITIONS=502} [2024-11-24 01:32:15,743 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 195 predicate places. [2024-11-24 01:32:15,743 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 502 transitions, 8708 flow [2024-11-24 01:32:15,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 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) [2024-11-24 01:32:15,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:15,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:15,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-24 01:32:15,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 01:32:15,945 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:15,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2038150419, now seen corresponding path program 9 times [2024-11-24 01:32:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:15,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-24 01:32:15,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:15,963 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:15,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:16,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:16,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-24 01:32:16,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276890280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:16,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850202865] [2024-11-24 01:32:16,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:16,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:16,148 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:16,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-24 01:32:16,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:16,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:16,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:16,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:16,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850202865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:16,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-24 01:32:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134438500] [2024-11-24 01:32:16,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:16,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:32:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:16,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:32:16,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:32:16,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:16,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 502 transitions, 8708 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 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) [2024-11-24 01:32:16,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:16,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:18,412 INFO L124 PetriNetUnfolderBase]: 3575/5209 cut-off events. [2024-11-24 01:32:18,412 INFO L125 PetriNetUnfolderBase]: For 97736/97736 co-relation queries the response was YES. [2024-11-24 01:32:18,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44540 conditions, 5209 events. 3575/5209 cut-off events. For 97736/97736 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26136 event pairs, 566 based on Foata normal form. 67/5276 useless extension candidates. Maximal degree in co-relation 44437. Up to 2937 conditions per place. [2024-11-24 01:32:18,454 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 538 selfloop transitions, 295 changer transitions 0/834 dead transitions. [2024-11-24 01:32:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 834 transitions, 15338 flow [2024-11-24 01:32:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:32:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 01:32:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 175 transitions. [2024-11-24 01:32:18,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4050925925925926 [2024-11-24 01:32:18,455 INFO L175 Difference]: Start difference. First operand has 224 places, 502 transitions, 8708 flow. Second operand 16 states and 175 transitions. [2024-11-24 01:32:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 834 transitions, 15338 flow [2024-11-24 01:32:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 834 transitions, 14939 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-11-24 01:32:19,207 INFO L231 Difference]: Finished difference. Result has 237 places, 597 transitions, 10835 flow [2024-11-24 01:32:19,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8429, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10835, PETRI_PLACES=237, PETRI_TRANSITIONS=597} [2024-11-24 01:32:19,208 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 208 predicate places. [2024-11-24 01:32:19,208 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 597 transitions, 10835 flow [2024-11-24 01:32:19,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 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) [2024-11-24 01:32:19,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:19,209 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:19,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-24 01:32:19,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-24 01:32:19,410 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:19,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash -708920431, now seen corresponding path program 10 times [2024-11-24 01:32:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603859464] [2024-11-24 01:32:19,411 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:32:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:19,418 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:32:19,418 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603859464] [2024-11-24 01:32:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603859464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111723913] [2024-11-24 01:32:19,480 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:32:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:19,482 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:19,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-24 01:32:19,576 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:32:19,576 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:19,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:32:19,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:19,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:19,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111723913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:19,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:19,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-24 01:32:19,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839278660] [2024-11-24 01:32:19,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:19,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:32:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:19,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:32:19,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:32:19,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:19,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 597 transitions, 10835 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:19,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:19,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:19,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:21,781 INFO L124 PetriNetUnfolderBase]: 3966/5826 cut-off events. [2024-11-24 01:32:21,781 INFO L125 PetriNetUnfolderBase]: For 115785/115785 co-relation queries the response was YES. [2024-11-24 01:32:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51894 conditions, 5826 events. 3966/5826 cut-off events. For 115785/115785 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30160 event pairs, 162 based on Foata normal form. 8/5834 useless extension candidates. Maximal degree in co-relation 51787. Up to 1736 conditions per place. [2024-11-24 01:32:21,854 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 640 selfloop transitions, 191 changer transitions 0/832 dead transitions. [2024-11-24 01:32:21,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 832 transitions, 16270 flow [2024-11-24 01:32:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 01:32:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-24 01:32:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 170 transitions. [2024-11-24 01:32:21,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-11-24 01:32:21,856 INFO L175 Difference]: Start difference. First operand has 237 places, 597 transitions, 10835 flow. Second operand 14 states and 170 transitions. [2024-11-24 01:32:21,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 832 transitions, 16270 flow [2024-11-24 01:32:22,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 832 transitions, 15111 flow, removed 356 selfloop flow, removed 8 redundant places. [2024-11-24 01:32:22,861 INFO L231 Difference]: Finished difference. Result has 250 places, 650 transitions, 11495 flow [2024-11-24 01:32:22,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10085, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11495, PETRI_PLACES=250, PETRI_TRANSITIONS=650} [2024-11-24 01:32:22,861 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2024-11-24 01:32:22,861 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 650 transitions, 11495 flow [2024-11-24 01:32:22,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:22,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:22,862 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:22,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-24 01:32:23,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-24 01:32:23,062 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:23,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 821495179, now seen corresponding path program 11 times [2024-11-24 01:32:23,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:23,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005163883] [2024-11-24 01:32:23,063 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:23,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:23,073 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:23,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:23,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005163883] [2024-11-24 01:32:23,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005163883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:23,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925580108] [2024-11-24 01:32:23,174 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:23,176 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-24 01:32:23,271 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:23,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:23,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:32:23,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:23,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925580108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:23,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-11-24 01:32:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295933377] [2024-11-24 01:32:23,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:23,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:32:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:23,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:32:23,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:32:23,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:23,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 650 transitions, 11495 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 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) [2024-11-24 01:32:23,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:23,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:23,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:25,687 INFO L124 PetriNetUnfolderBase]: 3909/5705 cut-off events. [2024-11-24 01:32:25,688 INFO L125 PetriNetUnfolderBase]: For 115936/115936 co-relation queries the response was YES. [2024-11-24 01:32:25,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51700 conditions, 5705 events. 3909/5705 cut-off events. For 115936/115936 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29181 event pairs, 252 based on Foata normal form. 88/5793 useless extension candidates. Maximal degree in co-relation 51585. Up to 1744 conditions per place. [2024-11-24 01:32:25,746 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 436 selfloop transitions, 533 changer transitions 0/970 dead transitions. [2024-11-24 01:32:25,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 970 transitions, 18064 flow [2024-11-24 01:32:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 01:32:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-24 01:32:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 357 transitions. [2024-11-24 01:32:25,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-11-24 01:32:25,748 INFO L175 Difference]: Start difference. First operand has 250 places, 650 transitions, 11495 flow. Second operand 35 states and 357 transitions. [2024-11-24 01:32:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 970 transitions, 18064 flow [2024-11-24 01:32:26,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 970 transitions, 17518 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-24 01:32:26,520 INFO L231 Difference]: Finished difference. Result has 278 places, 771 transitions, 14301 flow [2024-11-24 01:32:26,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14301, PETRI_PLACES=278, PETRI_TRANSITIONS=771} [2024-11-24 01:32:26,521 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2024-11-24 01:32:26,521 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 771 transitions, 14301 flow [2024-11-24 01:32:26,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 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) [2024-11-24 01:32:26,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:26,521 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:26,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-24 01:32:26,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-24 01:32:26,721 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:26,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1387167631, now seen corresponding path program 12 times [2024-11-24 01:32:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330769999] [2024-11-24 01:32:26,722 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:32:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:26,732 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:32:26,732 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330769999] [2024-11-24 01:32:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330769999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415788225] [2024-11-24 01:32:26,869 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:32:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:26,871 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:26,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-24 01:32:26,966 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:32:26,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:26,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:26,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:27,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415788225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:27,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:27,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-24 01:32:27,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179615328] [2024-11-24 01:32:27,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:27,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 01:32:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:27,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 01:32:27,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:32:27,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:27,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 771 transitions, 14301 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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) [2024-11-24 01:32:27,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:27,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:27,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:28,775 INFO L124 PetriNetUnfolderBase]: 3969/5811 cut-off events. [2024-11-24 01:32:28,775 INFO L125 PetriNetUnfolderBase]: For 118493/118493 co-relation queries the response was YES. [2024-11-24 01:32:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53730 conditions, 5811 events. 3969/5811 cut-off events. For 118493/118493 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29775 event pairs, 513 based on Foata normal form. 46/5857 useless extension candidates. Maximal degree in co-relation 53616. Up to 2617 conditions per place. [2024-11-24 01:32:28,836 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 522 selfloop transitions, 393 changer transitions 0/916 dead transitions. [2024-11-24 01:32:28,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 916 transitions, 18106 flow [2024-11-24 01:32:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:32:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:32:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-11-24 01:32:28,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3789173789173789 [2024-11-24 01:32:28,837 INFO L175 Difference]: Start difference. First operand has 278 places, 771 transitions, 14301 flow. Second operand 13 states and 133 transitions. [2024-11-24 01:32:28,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 916 transitions, 18106 flow [2024-11-24 01:32:30,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 916 transitions, 16845 flow, removed 316 selfloop flow, removed 13 redundant places. [2024-11-24 01:32:30,288 INFO L231 Difference]: Finished difference. Result has 278 places, 783 transitions, 14115 flow [2024-11-24 01:32:30,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13138, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14115, PETRI_PLACES=278, PETRI_TRANSITIONS=783} [2024-11-24 01:32:30,289 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2024-11-24 01:32:30,289 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 783 transitions, 14115 flow [2024-11-24 01:32:30,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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) [2024-11-24 01:32:30,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:30,289 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:30,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-24 01:32:30,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-24 01:32:30,490 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:30,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -988541388, now seen corresponding path program 11 times [2024-11-24 01:32:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203741185] [2024-11-24 01:32:30,491 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:30,501 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:30,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203741185] [2024-11-24 01:32:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203741185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826941750] [2024-11-24 01:32:30,625 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:30,628 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-24 01:32:30,734 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:30,734 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:30,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:32:30,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:30,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:31,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826941750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:31,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:31,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-24 01:32:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856284536] [2024-11-24 01:32:31,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:31,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:32:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:31,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:32:31,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:32:31,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:31,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 783 transitions, 14115 flow. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:31,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:31,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:31,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:34,753 INFO L124 PetriNetUnfolderBase]: 5196/7643 cut-off events. [2024-11-24 01:32:34,753 INFO L125 PetriNetUnfolderBase]: For 150791/150791 co-relation queries the response was YES. [2024-11-24 01:32:34,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69710 conditions, 7643 events. 5196/7643 cut-off events. For 150791/150791 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41519 event pairs, 170 based on Foata normal form. 71/7714 useless extension candidates. Maximal degree in co-relation 69599. Up to 2489 conditions per place. [2024-11-24 01:32:34,943 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 448 selfloop transitions, 819 changer transitions 0/1268 dead transitions. [2024-11-24 01:32:34,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1268 transitions, 23818 flow [2024-11-24 01:32:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 01:32:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-24 01:32:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 457 transitions. [2024-11-24 01:32:34,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3846801346801347 [2024-11-24 01:32:34,945 INFO L175 Difference]: Start difference. First operand has 278 places, 783 transitions, 14115 flow. Second operand 44 states and 457 transitions. [2024-11-24 01:32:34,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1268 transitions, 23818 flow [2024-11-24 01:32:36,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1268 transitions, 23045 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-11-24 01:32:36,540 INFO L231 Difference]: Finished difference. Result has 322 places, 1023 transitions, 19795 flow [2024-11-24 01:32:36,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13393, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19795, PETRI_PLACES=322, PETRI_TRANSITIONS=1023} [2024-11-24 01:32:36,541 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 293 predicate places. [2024-11-24 01:32:36,541 INFO L471 AbstractCegarLoop]: Abstraction has has 322 places, 1023 transitions, 19795 flow [2024-11-24 01:32:36,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:36,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:36,542 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:36,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-24 01:32:36,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-24 01:32:36,742 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:36,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash -282358198, now seen corresponding path program 12 times [2024-11-24 01:32:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681942786] [2024-11-24 01:32:36,743 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:32:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:36,752 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:32:36,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:36,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681942786] [2024-11-24 01:32:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681942786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214348278] [2024-11-24 01:32:36,835 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:32:36,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:36,837 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:36,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-24 01:32:36,926 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:32:36,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:36,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:36,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:37,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:32:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214348278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:37,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:37,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-24 01:32:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452997288] [2024-11-24 01:32:37,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:37,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:32:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:37,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:32:37,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:32:37,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:37,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1023 transitions, 19795 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:37,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:37,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:37,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:39,474 INFO L124 PetriNetUnfolderBase]: 5223/7688 cut-off events. [2024-11-24 01:32:39,474 INFO L125 PetriNetUnfolderBase]: For 163495/163495 co-relation queries the response was YES. [2024-11-24 01:32:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74194 conditions, 7688 events. 5223/7688 cut-off events. For 163495/163495 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41947 event pairs, 995 based on Foata normal form. 38/7726 useless extension candidates. Maximal degree in co-relation 74072. Up to 5103 conditions per place. [2024-11-24 01:32:39,645 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 888 selfloop transitions, 227 changer transitions 0/1116 dead transitions. [2024-11-24 01:32:39,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1116 transitions, 23648 flow [2024-11-24 01:32:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:32:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:32:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-11-24 01:32:39,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-24 01:32:39,646 INFO L175 Difference]: Start difference. First operand has 322 places, 1023 transitions, 19795 flow. Second operand 10 states and 104 transitions. [2024-11-24 01:32:39,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1116 transitions, 23648 flow [2024-11-24 01:32:42,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1116 transitions, 20453 flow, removed 956 selfloop flow, removed 13 redundant places. [2024-11-24 01:32:42,040 INFO L231 Difference]: Finished difference. Result has 319 places, 1023 transitions, 17527 flow [2024-11-24 01:32:42,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=16978, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17527, PETRI_PLACES=319, PETRI_TRANSITIONS=1023} [2024-11-24 01:32:42,041 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2024-11-24 01:32:42,041 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 1023 transitions, 17527 flow [2024-11-24 01:32:42,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:42,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:42,041 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:42,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-24 01:32:42,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-24 01:32:42,241 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:42,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 85865881, now seen corresponding path program 13 times [2024-11-24 01:32:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:42,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629536749] [2024-11-24 01:32:42,242 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:42,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:42,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:42,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629536749] [2024-11-24 01:32:42,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629536749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:42,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908595234] [2024-11-24 01:32:42,360 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:42,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:42,364 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:42,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-24 01:32:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:42,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:42,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:42,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908595234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:42,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:42,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-24 01:32:42,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698588970] [2024-11-24 01:32:42,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:42,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:32:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:42,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:32:42,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:32:42,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:42,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1023 transitions, 17527 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:42,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:42,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:42,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:45,182 INFO L124 PetriNetUnfolderBase]: 5315/7778 cut-off events. [2024-11-24 01:32:45,182 INFO L125 PetriNetUnfolderBase]: For 126584/126584 co-relation queries the response was YES. [2024-11-24 01:32:45,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65687 conditions, 7778 events. 5315/7778 cut-off events. For 126584/126584 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 41959 event pairs, 802 based on Foata normal form. 92/7870 useless extension candidates. Maximal degree in co-relation 65572. Up to 4370 conditions per place. [2024-11-24 01:32:45,315 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 702 selfloop transitions, 520 changer transitions 0/1223 dead transitions. [2024-11-24 01:32:45,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1223 transitions, 22451 flow [2024-11-24 01:32:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:32:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 01:32:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2024-11-24 01:32:45,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-11-24 01:32:45,316 INFO L175 Difference]: Start difference. First operand has 319 places, 1023 transitions, 17527 flow. Second operand 16 states and 174 transitions. [2024-11-24 01:32:45,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1223 transitions, 22451 flow [2024-11-24 01:32:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1223 transitions, 21873 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-11-24 01:32:46,859 INFO L231 Difference]: Finished difference. Result has 330 places, 1086 transitions, 19102 flow [2024-11-24 01:32:46,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=16857, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19102, PETRI_PLACES=330, PETRI_TRANSITIONS=1086} [2024-11-24 01:32:46,859 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2024-11-24 01:32:46,860 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1086 transitions, 19102 flow [2024-11-24 01:32:46,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:46,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:46,860 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:46,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-24 01:32:47,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-24 01:32:47,060 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:47,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1741335208, now seen corresponding path program 13 times [2024-11-24 01:32:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:47,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840370296] [2024-11-24 01:32:47,061 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:47,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840370296] [2024-11-24 01:32:47,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840370296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:47,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457648602] [2024-11-24 01:32:47,182 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:32:47,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:47,183 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-24 01:32:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:32:47,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:47,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:47,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457648602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:47,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-24 01:32:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396794081] [2024-11-24 01:32:47,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:47,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:32:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:47,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:32:47,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:32:47,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:47,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1086 transitions, 19102 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:47,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:47,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:47,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:50,038 INFO L124 PetriNetUnfolderBase]: 5357/7848 cut-off events. [2024-11-24 01:32:50,038 INFO L125 PetriNetUnfolderBase]: For 131635/131635 co-relation queries the response was YES. [2024-11-24 01:32:50,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67319 conditions, 7848 events. 5357/7848 cut-off events. For 131635/131635 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42742 event pairs, 1209 based on Foata normal form. 28/7876 useless extension candidates. Maximal degree in co-relation 67200. Up to 6419 conditions per place. [2024-11-24 01:32:50,180 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 888 selfloop transitions, 257 changer transitions 0/1146 dead transitions. [2024-11-24 01:32:50,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1146 transitions, 22146 flow [2024-11-24 01:32:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:32:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-24 01:32:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-11-24 01:32:50,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-11-24 01:32:50,181 INFO L175 Difference]: Start difference. First operand has 330 places, 1086 transitions, 19102 flow. Second operand 11 states and 110 transitions. [2024-11-24 01:32:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1146 transitions, 22146 flow [2024-11-24 01:32:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1146 transitions, 21571 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-11-24 01:32:52,066 INFO L231 Difference]: Finished difference. Result has 333 places, 1090 transitions, 19130 flow [2024-11-24 01:32:52,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18527, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19130, PETRI_PLACES=333, PETRI_TRANSITIONS=1090} [2024-11-24 01:32:52,067 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 304 predicate places. [2024-11-24 01:32:52,067 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1090 transitions, 19130 flow [2024-11-24 01:32:52,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:52,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:52,067 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:52,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-24 01:32:52,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:52,268 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:52,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1957158488, now seen corresponding path program 14 times [2024-11-24 01:32:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:52,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518806854] [2024-11-24 01:32:52,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:32:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:52,277 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:52,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:52,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:52,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518806854] [2024-11-24 01:32:52,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518806854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:52,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870888375] [2024-11-24 01:32:52,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:32:52,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:52,380 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-24 01:32:52,480 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:32:52,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:52,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:52,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:52,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870888375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:52,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:52,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-24 01:32:52,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484552781] [2024-11-24 01:32:52,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:52,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:32:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:52,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:32:52,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:32:52,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:52,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1090 transitions, 19130 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:52,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:52,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:52,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:32:55,493 INFO L124 PetriNetUnfolderBase]: 5407/7930 cut-off events. [2024-11-24 01:32:55,493 INFO L125 PetriNetUnfolderBase]: For 133415/133415 co-relation queries the response was YES. [2024-11-24 01:32:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68272 conditions, 7930 events. 5407/7930 cut-off events. For 133415/133415 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43090 event pairs, 509 based on Foata normal form. 23/7953 useless extension candidates. Maximal degree in co-relation 68152. Up to 2644 conditions per place. [2024-11-24 01:32:55,605 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 702 selfloop transitions, 460 changer transitions 0/1163 dead transitions. [2024-11-24 01:32:55,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1163 transitions, 22446 flow [2024-11-24 01:32:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:32:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:32:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-11-24 01:32:55,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-24 01:32:55,606 INFO L175 Difference]: Start difference. First operand has 333 places, 1090 transitions, 19130 flow. Second operand 10 states and 104 transitions. [2024-11-24 01:32:55,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1163 transitions, 22446 flow [2024-11-24 01:32:57,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1163 transitions, 21919 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-24 01:32:57,303 INFO L231 Difference]: Finished difference. Result has 334 places, 1084 transitions, 19474 flow [2024-11-24 01:32:57,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18508, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19474, PETRI_PLACES=334, PETRI_TRANSITIONS=1084} [2024-11-24 01:32:57,305 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 305 predicate places. [2024-11-24 01:32:57,305 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 1084 transitions, 19474 flow [2024-11-24 01:32:57,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:57,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:32:57,305 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:32:57,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-24 01:32:57,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-24 01:32:57,506 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:32:57,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -799614478, now seen corresponding path program 15 times [2024-11-24 01:32:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534405302] [2024-11-24 01:32:57,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:57,519 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:57,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:57,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534405302] [2024-11-24 01:32:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534405302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:32:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505224801] [2024-11-24 01:32:57,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:32:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:57,633 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:57,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-24 01:32:57,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:32:57,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:57,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:32:57,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:57,843 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:32:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505224801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:32:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-24 01:32:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132802957] [2024-11-24 01:32:57,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:57,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 01:32:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:57,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 01:32:57,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:32:57,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:32:57,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1084 transitions, 19474 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:32:57,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:32:57,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:32:57,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:00,415 INFO L124 PetriNetUnfolderBase]: 5362/7849 cut-off events. [2024-11-24 01:33:00,415 INFO L125 PetriNetUnfolderBase]: For 134453/134453 co-relation queries the response was YES. [2024-11-24 01:33:00,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68738 conditions, 7849 events. 5362/7849 cut-off events. For 134453/134453 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42414 event pairs, 398 based on Foata normal form. 30/7879 useless extension candidates. Maximal degree in co-relation 68617. Up to 2630 conditions per place. [2024-11-24 01:33:00,528 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 646 selfloop transitions, 582 changer transitions 0/1229 dead transitions. [2024-11-24 01:33:00,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1229 transitions, 23817 flow [2024-11-24 01:33:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 01:33:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-24 01:33:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 204 transitions. [2024-11-24 01:33:00,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-11-24 01:33:00,530 INFO L175 Difference]: Start difference. First operand has 334 places, 1084 transitions, 19474 flow. Second operand 18 states and 204 transitions. [2024-11-24 01:33:00,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1229 transitions, 23817 flow [2024-11-24 01:33:02,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1229 transitions, 23045 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-24 01:33:02,437 INFO L231 Difference]: Finished difference. Result has 343 places, 1073 transitions, 19712 flow [2024-11-24 01:33:02,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18548, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19712, PETRI_PLACES=343, PETRI_TRANSITIONS=1073} [2024-11-24 01:33:02,438 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 314 predicate places. [2024-11-24 01:33:02,438 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 1073 transitions, 19712 flow [2024-11-24 01:33:02,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:02,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:02,439 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:02,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-24 01:33:02,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:02,639 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:33:02,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1394272188, now seen corresponding path program 16 times [2024-11-24 01:33:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993470486] [2024-11-24 01:33:02,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:33:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:02,647 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:33:02,647 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:33:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993470486] [2024-11-24 01:33:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993470486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755815606] [2024-11-24 01:33:02,705 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:33:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:02,707 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:02,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-24 01:33:02,791 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:33:02,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:02,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:33:02,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:33:02,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:33:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755815606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:02,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-24 01:33:02,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906354323] [2024-11-24 01:33:02,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:02,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:33:02,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:02,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:33:02,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:33:02,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:33:02,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1073 transitions, 19712 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:02,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:02,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:33:02,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:05,419 INFO L124 PetriNetUnfolderBase]: 5378/7877 cut-off events. [2024-11-24 01:33:05,419 INFO L125 PetriNetUnfolderBase]: For 134622/134622 co-relation queries the response was YES. [2024-11-24 01:33:05,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70167 conditions, 7877 events. 5378/7877 cut-off events. For 134622/134622 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42707 event pairs, 338 based on Foata normal form. 12/7889 useless extension candidates. Maximal degree in co-relation 70046. Up to 2646 conditions per place. [2024-11-24 01:33:05,549 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 891 selfloop transitions, 386 changer transitions 0/1278 dead transitions. [2024-11-24 01:33:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1278 transitions, 25186 flow [2024-11-24 01:33:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 01:33:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-24 01:33:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 208 transitions. [2024-11-24 01:33:05,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4279835390946502 [2024-11-24 01:33:05,551 INFO L175 Difference]: Start difference. First operand has 343 places, 1073 transitions, 19712 flow. Second operand 18 states and 208 transitions. [2024-11-24 01:33:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1278 transitions, 25186 flow [2024-11-24 01:33:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1278 transitions, 23816 flow, removed 0 selfloop flow, removed 17 redundant places. [2024-11-24 01:33:07,282 INFO L231 Difference]: Finished difference. Result has 351 places, 1086 transitions, 19680 flow [2024-11-24 01:33:07,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18516, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19680, PETRI_PLACES=351, PETRI_TRANSITIONS=1086} [2024-11-24 01:33:07,284 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 322 predicate places. [2024-11-24 01:33:07,284 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 1086 transitions, 19680 flow [2024-11-24 01:33:07,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:07,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:07,284 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:07,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-24 01:33:07,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-24 01:33:07,485 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:33:07,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1184019091, now seen corresponding path program 14 times [2024-11-24 01:33:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869543299] [2024-11-24 01:33:07,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:07,493 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:07,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:33:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869543299] [2024-11-24 01:33:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869543299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032614391] [2024-11-24 01:33:07,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:07,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:07,619 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:07,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-24 01:33:07,731 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:07,732 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:07,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:33:07,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:33:07,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:33:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032614391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:08,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:08,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-24 01:33:08,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162081108] [2024-11-24 01:33:08,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:08,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:33:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:08,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:33:08,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:33:08,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:33:08,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1086 transitions, 19680 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:08,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:33:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:10,319 INFO L124 PetriNetUnfolderBase]: 5327/7772 cut-off events. [2024-11-24 01:33:10,319 INFO L125 PetriNetUnfolderBase]: For 137516/137516 co-relation queries the response was YES. [2024-11-24 01:33:10,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69259 conditions, 7772 events. 5327/7772 cut-off events. For 137516/137516 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 41595 event pairs, 914 based on Foata normal form. 38/7810 useless extension candidates. Maximal degree in co-relation 69130. Up to 4675 conditions per place. [2024-11-24 01:33:10,462 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 744 selfloop transitions, 390 changer transitions 0/1135 dead transitions. [2024-11-24 01:33:10,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1135 transitions, 22510 flow [2024-11-24 01:33:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:33:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:33:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-11-24 01:33:10,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-24 01:33:10,464 INFO L175 Difference]: Start difference. First operand has 351 places, 1086 transitions, 19680 flow. Second operand 10 states and 99 transitions. [2024-11-24 01:33:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1135 transitions, 22510 flow [2024-11-24 01:33:13,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1135 transitions, 21817 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-11-24 01:33:13,031 INFO L231 Difference]: Finished difference. Result has 354 places, 1079 transitions, 19703 flow [2024-11-24 01:33:13,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18923, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19703, PETRI_PLACES=354, PETRI_TRANSITIONS=1079} [2024-11-24 01:33:13,032 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2024-11-24 01:33:13,032 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 1079 transitions, 19703 flow [2024-11-24 01:33:13,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:13,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:13,033 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:13,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-24 01:33:13,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-24 01:33:13,233 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:33:13,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1420445512, now seen corresponding path program 17 times [2024-11-24 01:33:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-24 01:33:13,234 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:33:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:13,242 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:13,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:33:13,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:13,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-24 01:33:13,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156195980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:13,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757581213] [2024-11-24 01:33:13,321 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:33:13,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:13,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:13,323 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:13,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-24 01:33:13,420 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:13,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:13,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:33:13,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:33:13,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:33:13,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757581213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:13,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:13,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-24 01:33:13,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594841428] [2024-11-24 01:33:13,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:13,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:33:13,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:13,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:33:13,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:33:13,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:33:13,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1079 transitions, 19703 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:33:13,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:17,838 INFO L124 PetriNetUnfolderBase]: 5582/8148 cut-off events. [2024-11-24 01:33:17,839 INFO L125 PetriNetUnfolderBase]: For 144678/144678 co-relation queries the response was YES. [2024-11-24 01:33:17,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 8148 events. 5582/8148 cut-off events. For 144678/144678 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 44378 event pairs, 421 based on Foata normal form. 52/8200 useless extension candidates. Maximal degree in co-relation 72712. Up to 2780 conditions per place. [2024-11-24 01:33:18,000 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 587 selfloop transitions, 792 changer transitions 0/1380 dead transitions. [2024-11-24 01:33:18,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1380 transitions, 26532 flow [2024-11-24 01:33:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-24 01:33:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-24 01:33:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 425 transitions. [2024-11-24 01:33:18,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3497942386831276 [2024-11-24 01:33:18,002 INFO L175 Difference]: Start difference. First operand has 354 places, 1079 transitions, 19703 flow. Second operand 45 states and 425 transitions. [2024-11-24 01:33:18,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1380 transitions, 26532 flow [2024-11-24 01:33:20,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1380 transitions, 25541 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-11-24 01:33:20,327 INFO L231 Difference]: Finished difference. Result has 403 places, 1169 transitions, 22468 flow [2024-11-24 01:33:20,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18784, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22468, PETRI_PLACES=403, PETRI_TRANSITIONS=1169} [2024-11-24 01:33:20,328 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 374 predicate places. [2024-11-24 01:33:20,328 INFO L471 AbstractCegarLoop]: Abstraction has has 403 places, 1169 transitions, 22468 flow [2024-11-24 01:33:20,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:20,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:20,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:20,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-24 01:33:20,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-24 01:33:20,529 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:33:20,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2135070989, now seen corresponding path program 8 times [2024-11-24 01:33:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539242256] [2024-11-24 01:33:20,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:20,556 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:20,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:21,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539242256] [2024-11-24 01:33:21,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539242256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230686748] [2024-11-24 01:33:21,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:21,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:21,349 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:21,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-24 01:33:21,493 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:21,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:21,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-24 01:33:21,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:21,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:33:22,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:33:22,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-11-24 01:33:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:22,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:23,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-11-24 01:33:23,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:33:23,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 202 [2024-11-24 01:33:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230686748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:26,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:26,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2024-11-24 01:33:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702075732] [2024-11-24 01:33:26,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:26,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-24 01:33:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:26,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-24 01:33:26,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2024-11-24 01:33:26,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:33:26,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1169 transitions, 22468 flow. Second operand has 40 states, 40 states have (on average 5.8) internal successors, (232), 40 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:26,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:26,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:33:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:39,444 INFO L124 PetriNetUnfolderBase]: 9108/13382 cut-off events. [2024-11-24 01:33:39,444 INFO L125 PetriNetUnfolderBase]: For 295967/295967 co-relation queries the response was YES. [2024-11-24 01:33:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131416 conditions, 13382 events. 9108/13382 cut-off events. For 295967/295967 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 80084 event pairs, 378 based on Foata normal form. 5/13387 useless extension candidates. Maximal degree in co-relation 131273. Up to 9416 conditions per place. [2024-11-24 01:33:39,740 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 1526 selfloop transitions, 1054 changer transitions 18/2599 dead transitions. [2024-11-24 01:33:39,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2599 transitions, 56046 flow [2024-11-24 01:33:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-24 01:33:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-24 01:33:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 727 transitions. [2024-11-24 01:33:39,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42739564961787185 [2024-11-24 01:33:39,743 INFO L175 Difference]: Start difference. First operand has 403 places, 1169 transitions, 22468 flow. Second operand 63 states and 727 transitions. [2024-11-24 01:33:39,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2599 transitions, 56046 flow [2024-11-24 01:33:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2599 transitions, 54227 flow, removed 367 selfloop flow, removed 12 redundant places. [2024-11-24 01:33:45,485 INFO L231 Difference]: Finished difference. Result has 473 places, 2013 transitions, 43317 flow [2024-11-24 01:33:45,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=21596, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=43317, PETRI_PLACES=473, PETRI_TRANSITIONS=2013} [2024-11-24 01:33:45,486 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 444 predicate places. [2024-11-24 01:33:45,486 INFO L471 AbstractCegarLoop]: Abstraction has has 473 places, 2013 transitions, 43317 flow [2024-11-24 01:33:45,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.8) internal successors, (232), 40 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:45,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:45,487 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:45,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-24 01:33:45,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:45,687 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:33:45,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash 706928499, now seen corresponding path program 9 times [2024-11-24 01:33:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:45,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068681435] [2024-11-24 01:33:45,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:33:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:45,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:33:45,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:46,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:46,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068681435] [2024-11-24 01:33:46,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068681435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:46,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302726626] [2024-11-24 01:33:46,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:33:46,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:46,684 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:46,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-24 01:33:46,791 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:33:46,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:46,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 01:33:46,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:46,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:33:47,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:33:47,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-11-24 01:33:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:47,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:47,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-11-24 01:33:47,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:33:47,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 218 [2024-11-24 01:34:12,303 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:34:47,891 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:34:48,109 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:34:49,484 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:34:58,960 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:35:00,533 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:35:00,564 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:35:16,215 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:35:16,740 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:35:48,667 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:39:56,291 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:40:06,392 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:40:17,617 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-24 01:40:22,003 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-24 01:40:26,214 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:40:30,275 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:42:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302726626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:42:20,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:42:20,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-11-24 01:42:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035829116] [2024-11-24 01:42:20,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:42:20,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 01:42:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:42:20,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 01:42:20,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:42:20,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-24 01:42:20,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 2013 transitions, 43317 flow. Second operand has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:20,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:42:20,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-24 01:42:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:42:32,030 INFO L124 PetriNetUnfolderBase]: 10162/14973 cut-off events. [2024-11-24 01:42:32,030 INFO L125 PetriNetUnfolderBase]: For 358005/358005 co-relation queries the response was YES. [2024-11-24 01:42:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152168 conditions, 14973 events. 10162/14973 cut-off events. For 358005/358005 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 91454 event pairs, 421 based on Foata normal form. 8/14981 useless extension candidates. Maximal degree in co-relation 152007. Up to 10909 conditions per place. [2024-11-24 01:42:32,447 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1716 selfloop transitions, 946 changer transitions 8/2671 dead transitions. [2024-11-24 01:42:32,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 2671 transitions, 60619 flow [2024-11-24 01:42:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-24 01:42:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-24 01:42:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 417 transitions. [2024-11-24 01:42:32,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2024-11-24 01:42:32,453 INFO L175 Difference]: Start difference. First operand has 473 places, 2013 transitions, 43317 flow. Second operand 33 states and 417 transitions. [2024-11-24 01:42:32,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 2671 transitions, 60619 flow [2024-11-24 01:42:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 2671 transitions, 55903 flow, removed 2132 selfloop flow, removed 8 redundant places. [2024-11-24 01:42:43,216 INFO L231 Difference]: Finished difference. Result has 507 places, 2227 transitions, 45927 flow [2024-11-24 01:42:43,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=39086, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=45927, PETRI_PLACES=507, PETRI_TRANSITIONS=2227} [2024-11-24 01:42:43,218 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 478 predicate places. [2024-11-24 01:42:43,218 INFO L471 AbstractCegarLoop]: Abstraction has has 507 places, 2227 transitions, 45927 flow [2024-11-24 01:42:43,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:43,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:42:43,219 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:42:43,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-24 01:42:43,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:43,419 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:42:43,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:42:43,421 INFO L85 PathProgramCache]: Analyzing trace with hash 671313285, now seen corresponding path program 10 times [2024-11-24 01:42:43,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:42:43,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782185605] [2024-11-24 01:42:43,421 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:42:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:42:43,439 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:42:43,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:42:43,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:42:43,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782185605] [2024-11-24 01:42:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782185605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:43,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813265141] [2024-11-24 01:42:43,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:42:43,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:42:43,877 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:42:43,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692f9ec1-3baa-4bb3-b3fe-cab76b2a41ba/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-24 01:42:44,000 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:42:44,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:44,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-24 01:42:44,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:42:44,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:42:44,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:42:44,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-11-24 01:42:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:44,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:42:45,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-11-24 01:42:45,650 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-24 01:42:45,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 210 [2024-11-24 01:43:14,076 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:43:14,216 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 01:43:48,703 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.