./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:46:31,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:46:31,973 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:46:31,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:46:31,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:46:32,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:46:32,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:46:32,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:46:32,004 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:46:32,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:46:32,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:46:32,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:46:32,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:46:32,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:46:32,007 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:46:32,008 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:46:32,008 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:46:32,008 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:46:32,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:46:32,008 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:46:32,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:46:32,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:46:32,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:46:32,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:46:32,010 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:46:32,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:46:32,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:46:32,011 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:46:32,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:46:32,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:46:32,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:46:32,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:46:32,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:46:32,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:46:32,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:46:32,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:46:32,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:46:32,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:46:32,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:46:32,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:46:32,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:46:32,015 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:46:32,015 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-19 01:46:32,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:46:32,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:46:32,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:46:32,311 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:46:32,312 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:46:32,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-19 01:46:33,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:46:33,893 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:46:33,893 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-19 01:46:33,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8a62510/68d4b12933fe4205a925f2b22fc884c9/FLAG75391480b [2024-11-19 01:46:33,913 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8a62510/68d4b12933fe4205a925f2b22fc884c9 [2024-11-19 01:46:33,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:46:33,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:46:33,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:46:33,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:46:33,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:46:33,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:46:33" (1/1) ... [2024-11-19 01:46:33,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfe7971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:33, skipping insertion in model container [2024-11-19 01:46:33,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:46:33" (1/1) ... [2024-11-19 01:46:33,947 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:46:34,096 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2024-11-19 01:46:34,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:46:34,117 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:46:34,144 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2024-11-19 01:46:34,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:46:34,166 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:46:34,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34 WrapperNode [2024-11-19 01:46:34,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:46:34,167 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:46:34,167 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:46:34,167 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:46:34,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,195 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 123 [2024-11-19 01:46:34,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:46:34,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:46:34,196 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:46:34,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:46:34,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,227 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-19 01:46:34,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:46:34,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:46:34,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:46:34,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:46:34,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (1/1) ... [2024-11-19 01:46:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:46:34,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:34,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:46:34,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:46:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:46:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:46:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:46:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:46:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:46:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:46:34,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:46:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:46:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:46:34,326 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:46:34,439 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:46:34,441 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:46:34,751 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:46:34,751 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:46:34,948 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:46:34,952 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 01:46:34,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:46:34 BoogieIcfgContainer [2024-11-19 01:46:34,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:46:34,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:46:34,955 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:46:34,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:46:34,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:46:33" (1/3) ... [2024-11-19 01:46:34,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90e0209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:46:34, skipping insertion in model container [2024-11-19 01:46:34,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:34" (2/3) ... [2024-11-19 01:46:34,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90e0209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:46:34, skipping insertion in model container [2024-11-19 01:46:34,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:46:34" (3/3) ... [2024-11-19 01:46:34,963 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-19 01:46:34,979 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:46:34,979 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:46:34,980 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:46:35,034 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:46:35,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-11-19 01:46:35,098 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-11-19 01:46:35,099 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:46:35,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-19 01:46:35,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-11-19 01:46:35,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-11-19 01:46:35,117 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:46:35,122 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;@3d407704, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:46:35,123 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:46:35,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:46:35,138 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-11-19 01:46:35,138 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:46:35,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:35,139 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:35,140 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:35,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1992990212, now seen corresponding path program 1 times [2024-11-19 01:46:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:35,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928224840] [2024-11-19 01:46:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:35,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928224840] [2024-11-19 01:46:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928224840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:46:35,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480942527] [2024-11-19 01:46:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:35,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:46:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:46:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:46:35,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:35,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:35,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:35,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:35,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:35,938 INFO L124 PetriNetUnfolderBase]: 271/440 cut-off events. [2024-11-19 01:46:35,938 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-19 01:46:35,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 440 events. 271/440 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1484 event pairs, 138 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 824. Up to 343 conditions per place. [2024-11-19 01:46:35,943 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 40 selfloop transitions, 1 changer transitions 7/49 dead transitions. [2024-11-19 01:46:35,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 218 flow [2024-11-19 01:46:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:46:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:46:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-19 01:46:35,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2024-11-19 01:46:35,955 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 4 states and 62 transitions. [2024-11-19 01:46:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 218 flow [2024-11-19 01:46:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:46:35,961 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 75 flow [2024-11-19 01:46:35,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-11-19 01:46:35,966 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-19 01:46:35,966 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 75 flow [2024-11-19 01:46:35,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:35,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:35,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:35,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:46:35,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:35,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -837937516, now seen corresponding path program 2 times [2024-11-19 01:46:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:35,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075436912] [2024-11-19 01:46:35,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:35,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:35,995 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:46:35,998 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:36,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:36,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075436912] [2024-11-19 01:46:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075436912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:36,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:46:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645001181] [2024-11-19 01:46:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:36,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:46:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:46:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:46:36,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:36,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:36,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:36,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:36,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:36,423 INFO L124 PetriNetUnfolderBase]: 309/520 cut-off events. [2024-11-19 01:46:36,423 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-19 01:46:36,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 520 events. 309/520 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1927 event pairs, 174 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 1090. Up to 403 conditions per place. [2024-11-19 01:46:36,428 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 40 selfloop transitions, 1 changer transitions 9/51 dead transitions. [2024-11-19 01:46:36,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 225 flow [2024-11-19 01:46:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:46:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:46:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-19 01:46:36,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-19 01:46:36,431 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 75 flow. Second operand 4 states and 64 transitions. [2024-11-19 01:46:36,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 225 flow [2024-11-19 01:46:36,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 219 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:36,433 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 81 flow [2024-11-19 01:46:36,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-19 01:46:36,434 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-19 01:46:36,434 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 81 flow [2024-11-19 01:46:36,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:36,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:36,436 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:36,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:46:36,437 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:36,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash -840877155, now seen corresponding path program 1 times [2024-11-19 01:46:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:36,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664870054] [2024-11-19 01:46:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:36,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:36,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664870054] [2024-11-19 01:46:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664870054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:36,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:36,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:46:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750101017] [2024-11-19 01:46:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:36,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:46:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:46:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:46:36,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:36,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:36,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:36,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:36,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:36,587 INFO L124 PetriNetUnfolderBase]: 223/370 cut-off events. [2024-11-19 01:46:36,588 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-19 01:46:36,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 370 events. 223/370 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1164 event pairs, 73 based on Foata normal form. 21/327 useless extension candidates. Maximal degree in co-relation 797. Up to 302 conditions per place. [2024-11-19 01:46:36,590 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 33 selfloop transitions, 2 changer transitions 5/41 dead transitions. [2024-11-19 01:46:36,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 187 flow [2024-11-19 01:46:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:46:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:46:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-19 01:46:36,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 01:46:36,593 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 81 flow. Second operand 3 states and 51 transitions. [2024-11-19 01:46:36,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 187 flow [2024-11-19 01:46:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 184 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:36,595 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2024-11-19 01:46:36,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-19 01:46:36,598 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-19 01:46:36,598 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2024-11-19 01:46:36,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:36,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:36,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:36,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:46:36,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:36,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1355277831, now seen corresponding path program 1 times [2024-11-19 01:46:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:36,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833712629] [2024-11-19 01:46:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:37,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:37,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833712629] [2024-11-19 01:46:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833712629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 01:46:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930558070] [2024-11-19 01:46:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:37,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:46:37,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:37,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:37,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:37,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:37,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:37,447 INFO L124 PetriNetUnfolderBase]: 564/938 cut-off events. [2024-11-19 01:46:37,448 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-11-19 01:46:37,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 938 events. 564/938 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3924 event pairs, 64 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 545. Up to 233 conditions per place. [2024-11-19 01:46:37,454 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 107 selfloop transitions, 19 changer transitions 1/128 dead transitions. [2024-11-19 01:46:37,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 128 transitions, 588 flow [2024-11-19 01:46:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:46:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:46:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-11-19 01:46:37,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4197860962566845 [2024-11-19 01:46:37,477 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 11 states and 157 transitions. [2024-11-19 01:46:37,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 128 transitions, 588 flow [2024-11-19 01:46:37,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 128 transitions, 560 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:37,483 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 204 flow [2024-11-19 01:46:37,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=204, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2024-11-19 01:46:37,485 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-11-19 01:46:37,485 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 204 flow [2024-11-19 01:46:37,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:37,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:37,485 INFO L204 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] [2024-11-19 01:46:37,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:46:37,486 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:37,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash 535894153, now seen corresponding path program 1 times [2024-11-19 01:46:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:37,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777352944] [2024-11-19 01:46:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777352944] [2024-11-19 01:46:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777352944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529112247] [2024-11-19 01:46:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:37,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:37,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:46:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:37,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 01:46:37,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:38,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:39,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529112247] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:39,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:39,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-19 01:46:39,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584380278] [2024-11-19 01:46:39,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:39,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:46:39,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:40,287 INFO L124 PetriNetUnfolderBase]: 1208/2020 cut-off events. [2024-11-19 01:46:40,289 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2024-11-19 01:46:40,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5109 conditions, 2020 events. 1208/2020 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10290 event pairs, 134 based on Foata normal form. 1/1839 useless extension candidates. Maximal degree in co-relation 3279. Up to 442 conditions per place. [2024-11-19 01:46:40,302 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 137 selfloop transitions, 52 changer transitions 7/197 dead transitions. [2024-11-19 01:46:40,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 197 transitions, 1073 flow [2024-11-19 01:46:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:46:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:46:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-11-19 01:46:40,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45475113122171945 [2024-11-19 01:46:40,305 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 204 flow. Second operand 13 states and 201 transitions. [2024-11-19 01:46:40,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 197 transitions, 1073 flow [2024-11-19 01:46:40,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 197 transitions, 1069 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-19 01:46:40,313 INFO L231 Difference]: Finished difference. Result has 66 places, 86 transitions, 594 flow [2024-11-19 01:46:40,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=594, PETRI_PLACES=66, PETRI_TRANSITIONS=86} [2024-11-19 01:46:40,315 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-11-19 01:46:40,316 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 86 transitions, 594 flow [2024-11-19 01:46:40,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:40,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:40,319 INFO L204 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] [2024-11-19 01:46:40,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:46:40,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:40,521 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:40,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1296876059, now seen corresponding path program 1 times [2024-11-19 01:46:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:40,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490566186] [2024-11-19 01:46:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:40,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490566186] [2024-11-19 01:46:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490566186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429681735] [2024-11-19 01:46:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:40,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:40,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:40,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:46:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:40,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 01:46:40,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:41,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429681735] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:42,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:42,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-19 01:46:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389675474] [2024-11-19 01:46:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:42,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-11-19 01:46:42,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:42,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 86 transitions, 594 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:42,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:42,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:42,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:43,123 INFO L124 PetriNetUnfolderBase]: 1653/2760 cut-off events. [2024-11-19 01:46:43,124 INFO L125 PetriNetUnfolderBase]: For 3797/3797 co-relation queries the response was YES. [2024-11-19 01:46:43,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8617 conditions, 2760 events. 1653/2760 cut-off events. For 3797/3797 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15007 event pairs, 352 based on Foata normal form. 1/2510 useless extension candidates. Maximal degree in co-relation 8542. Up to 762 conditions per place. [2024-11-19 01:46:43,143 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 194 selfloop transitions, 49 changer transitions 8/252 dead transitions. [2024-11-19 01:46:43,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 252 transitions, 1756 flow [2024-11-19 01:46:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:46:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:46:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 248 transitions. [2024-11-19 01:46:43,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-11-19 01:46:43,147 INFO L175 Difference]: Start difference. First operand has 66 places, 86 transitions, 594 flow. Second operand 14 states and 248 transitions. [2024-11-19 01:46:43,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 252 transitions, 1756 flow [2024-11-19 01:46:43,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 252 transitions, 1729 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:43,169 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 873 flow [2024-11-19 01:46:43,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=873, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2024-11-19 01:46:43,171 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-11-19 01:46:43,171 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 873 flow [2024-11-19 01:46:43,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:43,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:43,172 INFO L204 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] [2024-11-19 01:46:43,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:43,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 01:46:43,377 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:43,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1128262593, now seen corresponding path program 2 times [2024-11-19 01:46:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:43,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045001725] [2024-11-19 01:46:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:43,400 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:46:43,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045001725] [2024-11-19 01:46:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045001725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:43,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:43,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:46:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583163416] [2024-11-19 01:46:43,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:43,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:46:43,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:43,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:46:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:46:43,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:43,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 873 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:43,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:43,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:43,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:44,151 INFO L124 PetriNetUnfolderBase]: 1725/2929 cut-off events. [2024-11-19 01:46:44,151 INFO L125 PetriNetUnfolderBase]: For 6957/6957 co-relation queries the response was YES. [2024-11-19 01:46:44,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 2929 events. 1725/2929 cut-off events. For 6957/6957 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16377 event pairs, 280 based on Foata normal form. 1/2675 useless extension candidates. Maximal degree in co-relation 9843. Up to 762 conditions per place. [2024-11-19 01:46:44,171 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 139 selfloop transitions, 65 changer transitions 8/213 dead transitions. [2024-11-19 01:46:44,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 213 transitions, 1756 flow [2024-11-19 01:46:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:46:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:46:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 191 transitions. [2024-11-19 01:46:44,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4321266968325792 [2024-11-19 01:46:44,174 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 873 flow. Second operand 13 states and 191 transitions. [2024-11-19 01:46:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 213 transitions, 1756 flow [2024-11-19 01:46:44,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 213 transitions, 1687 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:44,200 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 1168 flow [2024-11-19 01:46:44,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1168, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-11-19 01:46:44,201 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-11-19 01:46:44,201 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 1168 flow [2024-11-19 01:46:44,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:44,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:44,201 INFO L204 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] [2024-11-19 01:46:44,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 01:46:44,202 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:44,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 558796803, now seen corresponding path program 2 times [2024-11-19 01:46:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702063436] [2024-11-19 01:46:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:44,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:46:44,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:44,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702063436] [2024-11-19 01:46:44,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702063436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:44,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:44,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 01:46:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104905645] [2024-11-19 01:46:44,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:44,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:46:44,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:44,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 1168 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:44,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:44,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:44,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:45,082 INFO L124 PetriNetUnfolderBase]: 1765/3020 cut-off events. [2024-11-19 01:46:45,083 INFO L125 PetriNetUnfolderBase]: For 10796/10796 co-relation queries the response was YES. [2024-11-19 01:46:45,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10987 conditions, 3020 events. 1765/3020 cut-off events. For 10796/10796 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17103 event pairs, 304 based on Foata normal form. 1/2762 useless extension candidates. Maximal degree in co-relation 10874. Up to 871 conditions per place. [2024-11-19 01:46:45,169 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 143 selfloop transitions, 70 changer transitions 8/222 dead transitions. [2024-11-19 01:46:45,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 222 transitions, 2103 flow [2024-11-19 01:46:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:46:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:46:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 187 transitions. [2024-11-19 01:46:45,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-11-19 01:46:45,171 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 1168 flow. Second operand 13 states and 187 transitions. [2024-11-19 01:46:45,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 222 transitions, 2103 flow [2024-11-19 01:46:45,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 222 transitions, 2032 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-11-19 01:46:45,204 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 1507 flow [2024-11-19 01:46:45,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1507, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2024-11-19 01:46:45,205 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-11-19 01:46:45,205 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 1507 flow [2024-11-19 01:46:45,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:45,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:45,205 INFO L204 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] [2024-11-19 01:46:45,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 01:46:45,206 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:45,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1133347400, now seen corresponding path program 1 times [2024-11-19 01:46:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:45,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853014382] [2024-11-19 01:46:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:45,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853014382] [2024-11-19 01:46:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853014382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:45,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:45,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:46:45,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412182623] [2024-11-19 01:46:45,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:45,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:46:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:46:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:46:45,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:45,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 1507 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:45,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:45,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:45,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:45,578 INFO L124 PetriNetUnfolderBase]: 1338/2339 cut-off events. [2024-11-19 01:46:45,578 INFO L125 PetriNetUnfolderBase]: For 11153/11153 co-relation queries the response was YES. [2024-11-19 01:46:45,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9045 conditions, 2339 events. 1338/2339 cut-off events. For 11153/11153 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12947 event pairs, 781 based on Foata normal form. 0/2170 useless extension candidates. Maximal degree in co-relation 8945. Up to 1251 conditions per place. [2024-11-19 01:46:45,592 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 128 selfloop transitions, 16 changer transitions 7/152 dead transitions. [2024-11-19 01:46:45,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 152 transitions, 1877 flow [2024-11-19 01:46:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:46:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:46:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-11-19 01:46:45,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-19 01:46:45,593 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 1507 flow. Second operand 6 states and 84 transitions. [2024-11-19 01:46:45,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 152 transitions, 1877 flow [2024-11-19 01:46:45,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 1800 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-11-19 01:46:45,622 INFO L231 Difference]: Finished difference. Result has 115 places, 110 transitions, 1236 flow [2024-11-19 01:46:45,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1236, PETRI_PLACES=115, PETRI_TRANSITIONS=110} [2024-11-19 01:46:45,622 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-11-19 01:46:45,623 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 110 transitions, 1236 flow [2024-11-19 01:46:45,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:45,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:45,623 INFO L204 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] [2024-11-19 01:46:45,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:46:45,623 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:45,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1972501553, now seen corresponding path program 3 times [2024-11-19 01:46:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:45,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036924563] [2024-11-19 01:46:45,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:45,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 01:46:45,636 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:45,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:45,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036924563] [2024-11-19 01:46:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036924563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:45,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:45,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 01:46:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655445481] [2024-11-19 01:46:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:45,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:45,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:46:45,904 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:45,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 110 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:45,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:45,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:45,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:46,370 INFO L124 PetriNetUnfolderBase]: 1295/2255 cut-off events. [2024-11-19 01:46:46,370 INFO L125 PetriNetUnfolderBase]: For 10824/10824 co-relation queries the response was YES. [2024-11-19 01:46:46,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9014 conditions, 2255 events. 1295/2255 cut-off events. For 10824/10824 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12316 event pairs, 247 based on Foata normal form. 1/2139 useless extension candidates. Maximal degree in co-relation 8811. Up to 1145 conditions per place. [2024-11-19 01:46:46,384 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 118 selfloop transitions, 51 changer transitions 11/181 dead transitions. [2024-11-19 01:46:46,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 181 transitions, 1839 flow [2024-11-19 01:46:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:46:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:46:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-11-19 01:46:46,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36199095022624433 [2024-11-19 01:46:46,386 INFO L175 Difference]: Start difference. First operand has 115 places, 110 transitions, 1236 flow. Second operand 13 states and 160 transitions. [2024-11-19 01:46:46,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 181 transitions, 1839 flow [2024-11-19 01:46:46,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 181 transitions, 1821 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 01:46:46,417 INFO L231 Difference]: Finished difference. Result has 127 places, 110 transitions, 1328 flow [2024-11-19 01:46:46,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1328, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2024-11-19 01:46:46,418 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-11-19 01:46:46,418 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 1328 flow [2024-11-19 01:46:46,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:46,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:46,418 INFO L204 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] [2024-11-19 01:46:46,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 01:46:46,418 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:46,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash 199085239, now seen corresponding path program 3 times [2024-11-19 01:46:46,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:46,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564875024] [2024-11-19 01:46:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:46,428 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 01:46:46,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564875024] [2024-11-19 01:46:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564875024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-19 01:46:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751394114] [2024-11-19 01:46:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:46,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:46:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:46:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:46:46,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:46,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 110 transitions, 1328 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:46,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:46,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:46,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:47,335 INFO L124 PetriNetUnfolderBase]: 1177/2083 cut-off events. [2024-11-19 01:46:47,337 INFO L125 PetriNetUnfolderBase]: For 11446/11446 co-relation queries the response was YES. [2024-11-19 01:46:47,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 2083 events. 1177/2083 cut-off events. For 11446/11446 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11433 event pairs, 275 based on Foata normal form. 29/2008 useless extension candidates. Maximal degree in co-relation 8381. Up to 1320 conditions per place. [2024-11-19 01:46:47,360 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 122 selfloop transitions, 59 changer transitions 13/195 dead transitions. [2024-11-19 01:46:47,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 2069 flow [2024-11-19 01:46:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:46:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:46:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 175 transitions. [2024-11-19 01:46:47,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2024-11-19 01:46:47,362 INFO L175 Difference]: Start difference. First operand has 127 places, 110 transitions, 1328 flow. Second operand 14 states and 175 transitions. [2024-11-19 01:46:47,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 2069 flow [2024-11-19 01:46:47,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 195 transitions, 1993 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-19 01:46:47,408 INFO L231 Difference]: Finished difference. Result has 142 places, 122 transitions, 1559 flow [2024-11-19 01:46:47,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1559, PETRI_PLACES=142, PETRI_TRANSITIONS=122} [2024-11-19 01:46:47,409 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-11-19 01:46:47,409 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 122 transitions, 1559 flow [2024-11-19 01:46:47,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:47,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:47,410 INFO L204 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] [2024-11-19 01:46:47,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 01:46:47,410 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:47,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1260427762, now seen corresponding path program 1 times [2024-11-19 01:46:47,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:47,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035538989] [2024-11-19 01:46:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:47,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:47,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035538989] [2024-11-19 01:46:47,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035538989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:47,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:47,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:46:47,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503080390] [2024-11-19 01:46:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:47,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:46:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:46:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:46:47,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:47,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 122 transitions, 1559 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:47,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:47,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:47,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:47,967 INFO L124 PetriNetUnfolderBase]: 892/1637 cut-off events. [2024-11-19 01:46:47,967 INFO L125 PetriNetUnfolderBase]: For 10195/10195 co-relation queries the response was YES. [2024-11-19 01:46:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6967 conditions, 1637 events. 892/1637 cut-off events. For 10195/10195 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8848 event pairs, 528 based on Foata normal form. 0/1591 useless extension candidates. Maximal degree in co-relation 6876. Up to 1086 conditions per place. [2024-11-19 01:46:47,996 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 98 selfloop transitions, 9 changer transitions 22/130 dead transitions. [2024-11-19 01:46:47,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 130 transitions, 1727 flow [2024-11-19 01:46:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:46:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:46:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-11-19 01:46:47,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37745098039215685 [2024-11-19 01:46:47,997 INFO L175 Difference]: Start difference. First operand has 142 places, 122 transitions, 1559 flow. Second operand 6 states and 77 transitions. [2024-11-19 01:46:47,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 130 transitions, 1727 flow [2024-11-19 01:46:48,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 130 transitions, 1630 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-11-19 01:46:48,063 INFO L231 Difference]: Finished difference. Result has 135 places, 90 transitions, 945 flow [2024-11-19 01:46:48,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=135, PETRI_TRANSITIONS=90} [2024-11-19 01:46:48,068 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-11-19 01:46:48,068 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 90 transitions, 945 flow [2024-11-19 01:46:48,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:48,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:48,068 INFO L204 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] [2024-11-19 01:46:48,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 01:46:48,069 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:48,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1186614687, now seen corresponding path program 4 times [2024-11-19 01:46:48,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988671110] [2024-11-19 01:46:48,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:48,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:48,089 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:48,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:48,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988671110] [2024-11-19 01:46:48,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988671110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:48,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028161561] [2024-11-19 01:46:48,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:48,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:48,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:48,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:48,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:46:48,392 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:48,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:48,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 01:46:48,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:48,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028161561] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:49,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:49,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 10] total 26 [2024-11-19 01:46:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298070612] [2024-11-19 01:46:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:49,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:46:49,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 90 transitions, 945 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:49,883 INFO L124 PetriNetUnfolderBase]: 922/1650 cut-off events. [2024-11-19 01:46:49,883 INFO L125 PetriNetUnfolderBase]: For 8619/8619 co-relation queries the response was YES. [2024-11-19 01:46:49,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7062 conditions, 1650 events. 922/1650 cut-off events. For 8619/8619 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8676 event pairs, 173 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 6975. Up to 544 conditions per place. [2024-11-19 01:46:49,894 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 156 selfloop transitions, 54 changer transitions 12/223 dead transitions. [2024-11-19 01:46:49,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 223 transitions, 2224 flow [2024-11-19 01:46:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 01:46:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 01:46:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 217 transitions. [2024-11-19 01:46:49,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42549019607843136 [2024-11-19 01:46:49,897 INFO L175 Difference]: Start difference. First operand has 135 places, 90 transitions, 945 flow. Second operand 15 states and 217 transitions. [2024-11-19 01:46:49,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 223 transitions, 2224 flow [2024-11-19 01:46:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 223 transitions, 2041 flow, removed 74 selfloop flow, removed 14 redundant places. [2024-11-19 01:46:49,930 INFO L231 Difference]: Finished difference. Result has 135 places, 107 transitions, 1219 flow [2024-11-19 01:46:49,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1219, PETRI_PLACES=135, PETRI_TRANSITIONS=107} [2024-11-19 01:46:49,931 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-11-19 01:46:49,931 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 1219 flow [2024-11-19 01:46:49,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:49,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:49,931 INFO L204 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] [2024-11-19 01:46:49,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:50,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:50,136 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:50,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1362675513, now seen corresponding path program 4 times [2024-11-19 01:46:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402840492] [2024-11-19 01:46:50,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:50,147 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:50,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:50,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:50,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402840492] [2024-11-19 01:46:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402840492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:50,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170869208] [2024-11-19 01:46:50,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:50,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:50,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:50,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:46:50,485 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:50,485 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:50,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 01:46:50,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:50,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170869208] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:51,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:51,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-19 01:46:51,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649550223] [2024-11-19 01:46:51,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:51,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:46:51,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:51,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 1219 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:51,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:51,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:51,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:51,603 INFO L124 PetriNetUnfolderBase]: 872/1540 cut-off events. [2024-11-19 01:46:51,604 INFO L125 PetriNetUnfolderBase]: For 8543/8543 co-relation queries the response was YES. [2024-11-19 01:46:51,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6985 conditions, 1540 events. 872/1540 cut-off events. For 8543/8543 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7861 event pairs, 204 based on Foata normal form. 1/1541 useless extension candidates. Maximal degree in co-relation 6901. Up to 565 conditions per place. [2024-11-19 01:46:51,616 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 118 selfloop transitions, 47 changer transitions 8/174 dead transitions. [2024-11-19 01:46:51,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 1883 flow [2024-11-19 01:46:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:46:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:46:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-11-19 01:46:51,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2024-11-19 01:46:51,621 INFO L175 Difference]: Start difference. First operand has 135 places, 107 transitions, 1219 flow. Second operand 12 states and 156 transitions. [2024-11-19 01:46:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 1883 flow [2024-11-19 01:46:51,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 174 transitions, 1647 flow, removed 54 selfloop flow, removed 17 redundant places. [2024-11-19 01:46:51,652 INFO L231 Difference]: Finished difference. Result has 127 places, 108 transitions, 1138 flow [2024-11-19 01:46:51,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1138, PETRI_PLACES=127, PETRI_TRANSITIONS=108} [2024-11-19 01:46:51,653 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-11-19 01:46:51,653 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 108 transitions, 1138 flow [2024-11-19 01:46:51,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:51,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:51,653 INFO L204 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] [2024-11-19 01:46:51,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:46:51,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:51,854 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:51,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 621901887, now seen corresponding path program 5 times [2024-11-19 01:46:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815089329] [2024-11-19 01:46:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:51,871 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:51,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:52,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815089329] [2024-11-19 01:46:52,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815089329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:52,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365664526] [2024-11-19 01:46:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:52,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:52,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:46:52,144 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:52,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:52,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 01:46:52,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:52,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365664526] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-19 01:46:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487211256] [2024-11-19 01:46:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:53,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:46:53,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:53,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 108 transitions, 1138 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:53,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:53,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:53,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:53,776 INFO L124 PetriNetUnfolderBase]: 867/1535 cut-off events. [2024-11-19 01:46:53,776 INFO L125 PetriNetUnfolderBase]: For 6145/6145 co-relation queries the response was YES. [2024-11-19 01:46:53,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6657 conditions, 1535 events. 867/1535 cut-off events. For 6145/6145 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7782 event pairs, 201 based on Foata normal form. 1/1536 useless extension candidates. Maximal degree in co-relation 6579. Up to 565 conditions per place. [2024-11-19 01:46:53,787 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 134 selfloop transitions, 43 changer transitions 12/190 dead transitions. [2024-11-19 01:46:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 1910 flow [2024-11-19 01:46:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:46:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:46:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 182 transitions. [2024-11-19 01:46:53,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-19 01:46:53,796 INFO L175 Difference]: Start difference. First operand has 127 places, 108 transitions, 1138 flow. Second operand 13 states and 182 transitions. [2024-11-19 01:46:53,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 1910 flow [2024-11-19 01:46:53,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 190 transitions, 1837 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-19 01:46:53,823 INFO L231 Difference]: Finished difference. Result has 131 places, 105 transitions, 1119 flow [2024-11-19 01:46:53,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1119, PETRI_PLACES=131, PETRI_TRANSITIONS=105} [2024-11-19 01:46:53,824 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-11-19 01:46:53,824 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 105 transitions, 1119 flow [2024-11-19 01:46:53,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:53,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:53,824 INFO L204 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] [2024-11-19 01:46:53,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:46:54,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:46:54,029 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:54,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2060358107, now seen corresponding path program 6 times [2024-11-19 01:46:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:54,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213125097] [2024-11-19 01:46:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:46:54,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:54,042 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-19 01:46:54,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213125097] [2024-11-19 01:46:54,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213125097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:54,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 01:46:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300172805] [2024-11-19 01:46:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:54,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:54,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:46:54,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:54,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 105 transitions, 1119 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:54,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:54,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:54,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:54,910 INFO L124 PetriNetUnfolderBase]: 864/1528 cut-off events. [2024-11-19 01:46:54,910 INFO L125 PetriNetUnfolderBase]: For 5975/5975 co-relation queries the response was YES. [2024-11-19 01:46:54,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6734 conditions, 1528 events. 864/1528 cut-off events. For 5975/5975 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7733 event pairs, 185 based on Foata normal form. 1/1529 useless extension candidates. Maximal degree in co-relation 6660. Up to 501 conditions per place. [2024-11-19 01:46:54,921 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 44 changer transitions 9/167 dead transitions. [2024-11-19 01:46:54,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 167 transitions, 1737 flow [2024-11-19 01:46:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:46:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:46:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-11-19 01:46:54,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36519607843137253 [2024-11-19 01:46:54,923 INFO L175 Difference]: Start difference. First operand has 131 places, 105 transitions, 1119 flow. Second operand 12 states and 149 transitions. [2024-11-19 01:46:54,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 167 transitions, 1737 flow [2024-11-19 01:46:54,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 1654 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-11-19 01:46:54,943 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 1145 flow [2024-11-19 01:46:54,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1145, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2024-11-19 01:46:54,943 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-11-19 01:46:54,944 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 1145 flow [2024-11-19 01:46:54,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:54,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:54,944 INFO L204 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] [2024-11-19 01:46:54,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 01:46:54,944 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:54,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1548036335, now seen corresponding path program 5 times [2024-11-19 01:46:54,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:54,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701954821] [2024-11-19 01:46:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:54,953 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:54,953 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:55,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701954821] [2024-11-19 01:46:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701954821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686410083] [2024-11-19 01:46:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:55,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:55,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:46:55,319 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:55,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:55,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 01:46:55,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:55,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686410083] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:56,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2024-11-19 01:46:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188191963] [2024-11-19 01:46:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:56,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-11-19 01:46:56,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:56,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 105 transitions, 1145 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:56,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:56,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:56,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:56,659 INFO L124 PetriNetUnfolderBase]: 872/1548 cut-off events. [2024-11-19 01:46:56,659 INFO L125 PetriNetUnfolderBase]: For 6339/6339 co-relation queries the response was YES. [2024-11-19 01:46:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 1548 events. 872/1548 cut-off events. For 6339/6339 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7931 event pairs, 252 based on Foata normal form. 1/1549 useless extension candidates. Maximal degree in co-relation 6891. Up to 1020 conditions per place. [2024-11-19 01:46:56,668 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 29 changer transitions 21/145 dead transitions. [2024-11-19 01:46:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 145 transitions, 1595 flow [2024-11-19 01:46:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:46:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:46:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-11-19 01:46:56,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30637254901960786 [2024-11-19 01:46:56,670 INFO L175 Difference]: Start difference. First operand has 130 places, 105 transitions, 1145 flow. Second operand 12 states and 125 transitions. [2024-11-19 01:46:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 145 transitions, 1595 flow [2024-11-19 01:46:56,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 145 transitions, 1413 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-19 01:46:56,697 INFO L231 Difference]: Finished difference. Result has 128 places, 98 transitions, 936 flow [2024-11-19 01:46:56,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=936, PETRI_PLACES=128, PETRI_TRANSITIONS=98} [2024-11-19 01:46:56,697 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-11-19 01:46:56,697 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 98 transitions, 936 flow [2024-11-19 01:46:56,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2024-11-19 01:46:56,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:56,698 INFO L204 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] [2024-11-19 01:46:56,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:46:56,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:46:56,903 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:56,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 401838977, now seen corresponding path program 6 times [2024-11-19 01:46:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41870364] [2024-11-19 01:46:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:46:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:56,914 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-19 01:46:56,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41870364] [2024-11-19 01:46:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41870364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:57,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:46:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394794762] [2024-11-19 01:46:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:57,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:46:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:46:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:46:57,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:57,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 98 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:57,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:57,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:57,427 INFO L124 PetriNetUnfolderBase]: 828/1461 cut-off events. [2024-11-19 01:46:57,428 INFO L125 PetriNetUnfolderBase]: For 5186/5186 co-relation queries the response was YES. [2024-11-19 01:46:57,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6038 conditions, 1461 events. 828/1461 cut-off events. For 5186/5186 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7277 event pairs, 252 based on Foata normal form. 1/1462 useless extension candidates. Maximal degree in co-relation 5970. Up to 1020 conditions per place. [2024-11-19 01:46:57,436 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 74 selfloop transitions, 24 changer transitions 26/125 dead transitions. [2024-11-19 01:46:57,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 1281 flow [2024-11-19 01:46:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:46:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:46:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-11-19 01:46:57,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3029411764705882 [2024-11-19 01:46:57,437 INFO L175 Difference]: Start difference. First operand has 128 places, 98 transitions, 936 flow. Second operand 10 states and 103 transitions. [2024-11-19 01:46:57,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 1281 flow [2024-11-19 01:46:57,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 1186 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-11-19 01:46:57,458 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 802 flow [2024-11-19 01:46:57,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=802, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-19 01:46:57,458 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-11-19 01:46:57,459 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 802 flow [2024-11-19 01:46:57,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:57,459 INFO L204 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] [2024-11-19 01:46:57,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 01:46:57,459 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:57,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1620332874, now seen corresponding path program 1 times [2024-11-19 01:46:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:57,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324442236] [2024-11-19 01:46:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324442236] [2024-11-19 01:46:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324442236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:57,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:46:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556330384] [2024-11-19 01:46:57,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:57,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:46:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:46:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:46:57,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:57,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:57,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:57,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:57,672 INFO L124 PetriNetUnfolderBase]: 633/1125 cut-off events. [2024-11-19 01:46:57,673 INFO L125 PetriNetUnfolderBase]: For 3921/3921 co-relation queries the response was YES. [2024-11-19 01:46:57,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1125 events. 633/1125 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5333 event pairs, 395 based on Foata normal form. 29/1154 useless extension candidates. Maximal degree in co-relation 4524. Up to 754 conditions per place. [2024-11-19 01:46:57,678 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 76 selfloop transitions, 7 changer transitions 16/100 dead transitions. [2024-11-19 01:46:57,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 991 flow [2024-11-19 01:46:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-11-19 01:46:57,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4294117647058823 [2024-11-19 01:46:57,680 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 802 flow. Second operand 5 states and 73 transitions. [2024-11-19 01:46:57,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 991 flow [2024-11-19 01:46:57,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 818 flow, removed 25 selfloop flow, removed 23 redundant places. [2024-11-19 01:46:57,692 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 471 flow [2024-11-19 01:46:57,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=471, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2024-11-19 01:46:57,693 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-11-19 01:46:57,693 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 471 flow [2024-11-19 01:46:57,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:57,693 INFO L204 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] [2024-11-19 01:46:57,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 01:46:57,693 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:57,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -102609566, now seen corresponding path program 1 times [2024-11-19 01:46:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:57,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067952924] [2024-11-19 01:46:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067952924] [2024-11-19 01:46:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067952924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:57,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:46:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368242798] [2024-11-19 01:46:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:57,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:46:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:46:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:46:57,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:57,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 70 transitions, 471 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:57,857 INFO L124 PetriNetUnfolderBase]: 497/874 cut-off events. [2024-11-19 01:46:57,857 INFO L125 PetriNetUnfolderBase]: For 2059/2059 co-relation queries the response was YES. [2024-11-19 01:46:57,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 874 events. 497/874 cut-off events. For 2059/2059 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3835 event pairs, 329 based on Foata normal form. 12/885 useless extension candidates. Maximal degree in co-relation 3252. Up to 754 conditions per place. [2024-11-19 01:46:57,861 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 52 selfloop transitions, 2 changer transitions 20/75 dead transitions. [2024-11-19 01:46:57,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 621 flow [2024-11-19 01:46:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-19 01:46:57,862 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2024-11-19 01:46:57,862 INFO L175 Difference]: Start difference. First operand has 89 places, 70 transitions, 471 flow. Second operand 5 states and 60 transitions. [2024-11-19 01:46:57,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 621 flow [2024-11-19 01:46:57,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 602 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 01:46:57,870 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 336 flow [2024-11-19 01:46:57,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2024-11-19 01:46:57,870 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-11-19 01:46:57,870 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 336 flow [2024-11-19 01:46:57,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:57,871 INFO L204 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] [2024-11-19 01:46:57,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 01:46:57,871 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:57,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1880739797, now seen corresponding path program 1 times [2024-11-19 01:46:57,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:57,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724353723] [2024-11-19 01:46:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:57,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724353723] [2024-11-19 01:46:57,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724353723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:57,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131845471] [2024-11-19 01:46:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:57,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:57,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:57,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:46:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:58,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:46:58,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:58,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:58,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131845471] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:58,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:58,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-19 01:46:58,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971636546] [2024-11-19 01:46:58,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:58,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:46:58,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:46:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:46:58,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:58,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:58,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:58,326 INFO L124 PetriNetUnfolderBase]: 497/843 cut-off events. [2024-11-19 01:46:58,326 INFO L125 PetriNetUnfolderBase]: For 1398/1398 co-relation queries the response was YES. [2024-11-19 01:46:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3041 conditions, 843 events. 497/843 cut-off events. For 1398/1398 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3457 event pairs, 231 based on Foata normal form. 36/878 useless extension candidates. Maximal degree in co-relation 3017. Up to 547 conditions per place. [2024-11-19 01:46:58,331 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 67 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-11-19 01:46:58,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 632 flow [2024-11-19 01:46:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:46:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:46:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-11-19 01:46:58,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2689075630252101 [2024-11-19 01:46:58,333 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 336 flow. Second operand 7 states and 64 transitions. [2024-11-19 01:46:58,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 632 flow [2024-11-19 01:46:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 609 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-19 01:46:58,339 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 354 flow [2024-11-19 01:46:58,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-11-19 01:46:58,339 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-11-19 01:46:58,340 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 354 flow [2024-11-19 01:46:58,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:58,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:58,340 INFO L204 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, 1] [2024-11-19 01:46:58,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:58,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:58,545 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:58,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -304506486, now seen corresponding path program 1 times [2024-11-19 01:46:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:58,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724323007] [2024-11-19 01:46:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:58,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724323007] [2024-11-19 01:46:58,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724323007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:58,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928029046] [2024-11-19 01:46:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:58,694 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:46:58,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:46:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:58,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:46:58,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:58,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:58,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928029046] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:58,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:46:58,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 01:46:58,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074446369] [2024-11-19 01:46:58,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:58,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:46:58,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:46:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:46:58,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:46:58,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:58,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:46:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:58,993 INFO L124 PetriNetUnfolderBase]: 364/613 cut-off events. [2024-11-19 01:46:58,993 INFO L125 PetriNetUnfolderBase]: For 1187/1187 co-relation queries the response was YES. [2024-11-19 01:46:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2385 conditions, 613 events. 364/613 cut-off events. For 1187/1187 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2210 event pairs, 185 based on Foata normal form. 20/632 useless extension candidates. Maximal degree in co-relation 2365. Up to 434 conditions per place. [2024-11-19 01:46:58,996 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 49 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2024-11-19 01:46:58,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 496 flow [2024-11-19 01:46:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:46:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:46:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2024-11-19 01:46:58,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27310924369747897 [2024-11-19 01:46:58,997 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 354 flow. Second operand 7 states and 65 transitions. [2024-11-19 01:46:58,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 496 flow [2024-11-19 01:46:59,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 475 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-19 01:46:59,000 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 320 flow [2024-11-19 01:46:59,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-11-19 01:46:59,001 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-11-19 01:46:59,001 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 320 flow [2024-11-19 01:46:59,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:59,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:59,001 INFO L204 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, 1, 1] [2024-11-19 01:46:59,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 01:46:59,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 01:46:59,206 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:59,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1156338135, now seen corresponding path program 1 times [2024-11-19 01:46:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:59,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885964663] [2024-11-19 01:46:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885964663] [2024-11-19 01:47:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885964663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028132608] [2024-11-19 01:47:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:47:00,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:00,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:00,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:00,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:47:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:00,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 01:47:00,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:00,896 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-19 01:47:00,896 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 83 treesize of output 52 [2024-11-19 01:47:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:00,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:01,470 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:01,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 82 [2024-11-19 01:47:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028132608] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:47:01,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-11-19 01:47:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789464384] [2024-11-19 01:47:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:01,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:01,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 01:47:01,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:01,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 320 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:01,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:01,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:01,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:02,770 INFO L124 PetriNetUnfolderBase]: 569/967 cut-off events. [2024-11-19 01:47:02,771 INFO L125 PetriNetUnfolderBase]: For 1970/1970 co-relation queries the response was YES. [2024-11-19 01:47:02,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3809 conditions, 967 events. 569/967 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4194 event pairs, 97 based on Foata normal form. 1/967 useless extension candidates. Maximal degree in co-relation 3791. Up to 383 conditions per place. [2024-11-19 01:47:02,776 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 101 selfloop transitions, 31 changer transitions 10/143 dead transitions. [2024-11-19 01:47:02,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 1077 flow [2024-11-19 01:47:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-11-19 01:47:02,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3550420168067227 [2024-11-19 01:47:02,778 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 320 flow. Second operand 14 states and 169 transitions. [2024-11-19 01:47:02,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 1077 flow [2024-11-19 01:47:02,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 143 transitions, 1057 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:02,785 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 586 flow [2024-11-19 01:47:02,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=586, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2024-11-19 01:47:02,785 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-11-19 01:47:02,785 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 586 flow [2024-11-19 01:47:02,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:02,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:02,786 INFO L204 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, 1, 1] [2024-11-19 01:47:02,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:47:02,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:02,987 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:02,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -834199651, now seen corresponding path program 2 times [2024-11-19 01:47:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:02,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469649919] [2024-11-19 01:47:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:03,028 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:47:03,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:03,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:03,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469649919] [2024-11-19 01:47:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469649919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:03,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880752373] [2024-11-19 01:47:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:03,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:03,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:03,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 586 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:03,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:03,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:03,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:03,999 INFO L124 PetriNetUnfolderBase]: 633/1069 cut-off events. [2024-11-19 01:47:04,000 INFO L125 PetriNetUnfolderBase]: For 5332/5332 co-relation queries the response was YES. [2024-11-19 01:47:04,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5129 conditions, 1069 events. 633/1069 cut-off events. For 5332/5332 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4729 event pairs, 312 based on Foata normal form. 1/1069 useless extension candidates. Maximal degree in co-relation 5101. Up to 785 conditions per place. [2024-11-19 01:47:04,006 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 77 selfloop transitions, 29 changer transitions 17/124 dead transitions. [2024-11-19 01:47:04,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1312 flow [2024-11-19 01:47:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:47:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:47:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 123 transitions. [2024-11-19 01:47:04,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27828054298642535 [2024-11-19 01:47:04,009 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 586 flow. Second operand 13 states and 123 transitions. [2024-11-19 01:47:04,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1312 flow [2024-11-19 01:47:04,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1268 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-19 01:47:04,020 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 931 flow [2024-11-19 01:47:04,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=931, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-11-19 01:47:04,021 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-11-19 01:47:04,021 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 931 flow [2024-11-19 01:47:04,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:04,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:04,022 INFO L204 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, 1, 1] [2024-11-19 01:47:04,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 01:47:04,022 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:04,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 81051381, now seen corresponding path program 3 times [2024-11-19 01:47:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:04,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096704463] [2024-11-19 01:47:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:04,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 01:47:04,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:04,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096704463] [2024-11-19 01:47:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096704463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:04,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002473298] [2024-11-19 01:47:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:04,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:04,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:04,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 931 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:04,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:04,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:04,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:05,051 INFO L124 PetriNetUnfolderBase]: 618/1047 cut-off events. [2024-11-19 01:47:05,052 INFO L125 PetriNetUnfolderBase]: For 6145/6145 co-relation queries the response was YES. [2024-11-19 01:47:05,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 1047 events. 618/1047 cut-off events. For 6145/6145 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4654 event pairs, 238 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 5326. Up to 560 conditions per place. [2024-11-19 01:47:05,059 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 116 selfloop transitions, 27 changer transitions 18/162 dead transitions. [2024-11-19 01:47:05,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 162 transitions, 1785 flow [2024-11-19 01:47:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 149 transitions. [2024-11-19 01:47:05,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3130252100840336 [2024-11-19 01:47:05,060 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 931 flow. Second operand 14 states and 149 transitions. [2024-11-19 01:47:05,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 162 transitions, 1785 flow [2024-11-19 01:47:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 162 transitions, 1642 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-11-19 01:47:05,079 INFO L231 Difference]: Finished difference. Result has 103 places, 83 transitions, 876 flow [2024-11-19 01:47:05,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=876, PETRI_PLACES=103, PETRI_TRANSITIONS=83} [2024-11-19 01:47:05,079 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-11-19 01:47:05,079 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 83 transitions, 876 flow [2024-11-19 01:47:05,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:05,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:05,080 INFO L204 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, 1, 1] [2024-11-19 01:47:05,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 01:47:05,081 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:05,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1938545821, now seen corresponding path program 4 times [2024-11-19 01:47:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:05,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777284117] [2024-11-19 01:47:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:05,105 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:05,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777284117] [2024-11-19 01:47:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777284117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103738757] [2024-11-19 01:47:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:05,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:47:05,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 83 transitions, 876 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:05,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:05,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:05,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:05,955 INFO L124 PetriNetUnfolderBase]: 613/1045 cut-off events. [2024-11-19 01:47:05,955 INFO L125 PetriNetUnfolderBase]: For 6114/6114 co-relation queries the response was YES. [2024-11-19 01:47:05,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5348 conditions, 1045 events. 613/1045 cut-off events. For 6114/6114 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4641 event pairs, 303 based on Foata normal form. 1/1046 useless extension candidates. Maximal degree in co-relation 5313. Up to 759 conditions per place. [2024-11-19 01:47:05,962 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 78 selfloop transitions, 30 changer transitions 17/126 dead transitions. [2024-11-19 01:47:05,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 126 transitions, 1409 flow [2024-11-19 01:47:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-11-19 01:47:05,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30392156862745096 [2024-11-19 01:47:05,963 INFO L175 Difference]: Start difference. First operand has 103 places, 83 transitions, 876 flow. Second operand 12 states and 124 transitions. [2024-11-19 01:47:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 126 transitions, 1409 flow [2024-11-19 01:47:05,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1318 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-11-19 01:47:05,975 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 967 flow [2024-11-19 01:47:05,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=967, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2024-11-19 01:47:05,976 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-11-19 01:47:05,976 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 967 flow [2024-11-19 01:47:05,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:05,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:05,976 INFO L204 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, 1, 1] [2024-11-19 01:47:05,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-19 01:47:05,976 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:05,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1140190331, now seen corresponding path program 5 times [2024-11-19 01:47:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781865233] [2024-11-19 01:47:05,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:05,995 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:05,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:06,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781865233] [2024-11-19 01:47:06,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781865233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235959694] [2024-11-19 01:47:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:06,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:06,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:06,620 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:06,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:47:06,693 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:06,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:06,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-19 01:47:06,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:07,036 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 01:47:07,036 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 83 treesize of output 47 [2024-11-19 01:47:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:07,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:07,524 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 01:47:07,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-11-19 01:47:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235959694] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:07,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:47:07,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-11-19 01:47:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659034460] [2024-11-19 01:47:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:07,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:07,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:07,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 01:47:07,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:07,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:07,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:07,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:07,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:08,523 INFO L124 PetriNetUnfolderBase]: 610/1043 cut-off events. [2024-11-19 01:47:08,523 INFO L125 PetriNetUnfolderBase]: For 6407/6407 co-relation queries the response was YES. [2024-11-19 01:47:08,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 1043 events. 610/1043 cut-off events. For 6407/6407 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4617 event pairs, 109 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 5292. Up to 607 conditions per place. [2024-11-19 01:47:08,529 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 91 selfloop transitions, 43 changer transitions 7/142 dead transitions. [2024-11-19 01:47:08,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 142 transitions, 1556 flow [2024-11-19 01:47:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 155 transitions. [2024-11-19 01:47:08,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32563025210084034 [2024-11-19 01:47:08,531 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 967 flow. Second operand 14 states and 155 transitions. [2024-11-19 01:47:08,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 142 transitions, 1556 flow [2024-11-19 01:47:08,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1494 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-19 01:47:08,546 INFO L231 Difference]: Finished difference. Result has 114 places, 91 transitions, 1040 flow [2024-11-19 01:47:08,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1040, PETRI_PLACES=114, PETRI_TRANSITIONS=91} [2024-11-19 01:47:08,546 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-11-19 01:47:08,547 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 91 transitions, 1040 flow [2024-11-19 01:47:08,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:08,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:08,547 INFO L204 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, 1, 1] [2024-11-19 01:47:08,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:08,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 01:47:08,752 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:08,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2119440933, now seen corresponding path program 6 times [2024-11-19 01:47:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:08,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468103927] [2024-11-19 01:47:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:08,765 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-19 01:47:08,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468103927] [2024-11-19 01:47:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468103927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:09,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476579517] [2024-11-19 01:47:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:09,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:09,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:09,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 91 transitions, 1040 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:09,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:09,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:09,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:09,496 INFO L124 PetriNetUnfolderBase]: 600/1029 cut-off events. [2024-11-19 01:47:09,496 INFO L125 PetriNetUnfolderBase]: For 5959/5959 co-relation queries the response was YES. [2024-11-19 01:47:09,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5265 conditions, 1029 events. 600/1029 cut-off events. For 5959/5959 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4585 event pairs, 319 based on Foata normal form. 1/1029 useless extension candidates. Maximal degree in co-relation 5226. Up to 777 conditions per place. [2024-11-19 01:47:09,502 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 78 selfloop transitions, 28 changer transitions 9/116 dead transitions. [2024-11-19 01:47:09,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 116 transitions, 1371 flow [2024-11-19 01:47:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-11-19 01:47:09,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28609625668449196 [2024-11-19 01:47:09,538 INFO L175 Difference]: Start difference. First operand has 114 places, 91 transitions, 1040 flow. Second operand 11 states and 107 transitions. [2024-11-19 01:47:09,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 116 transitions, 1371 flow [2024-11-19 01:47:09,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 1266 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:09,550 INFO L231 Difference]: Finished difference. Result has 116 places, 88 transitions, 945 flow [2024-11-19 01:47:09,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=945, PETRI_PLACES=116, PETRI_TRANSITIONS=88} [2024-11-19 01:47:09,551 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-11-19 01:47:09,551 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 88 transitions, 945 flow [2024-11-19 01:47:09,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:09,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:09,551 INFO L204 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, 1, 1] [2024-11-19 01:47:09,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-19 01:47:09,551 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:09,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1883086819, now seen corresponding path program 7 times [2024-11-19 01:47:09,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:09,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742563463] [2024-11-19 01:47:09,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:09,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:10,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:10,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742563463] [2024-11-19 01:47:10,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742563463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:10,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71338813] [2024-11-19 01:47:10,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:10,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:10,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:10,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:10,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:47:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:10,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 01:47:10,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:10,571 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-19 01:47:10,571 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 83 treesize of output 52 [2024-11-19 01:47:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:10,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:11,269 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:11,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-11-19 01:47:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:11,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71338813] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:11,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:47:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-11-19 01:47:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505630272] [2024-11-19 01:47:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:11,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 01:47:11,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:11,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 88 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:11,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:11,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:11,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:12,522 INFO L124 PetriNetUnfolderBase]: 791/1343 cut-off events. [2024-11-19 01:47:12,522 INFO L125 PetriNetUnfolderBase]: For 8995/8995 co-relation queries the response was YES. [2024-11-19 01:47:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 1343 events. 791/1343 cut-off events. For 8995/8995 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6235 event pairs, 113 based on Foata normal form. 1/1344 useless extension candidates. Maximal degree in co-relation 7033. Up to 647 conditions per place. [2024-11-19 01:47:12,532 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 120 selfloop transitions, 73 changer transitions 10/204 dead transitions. [2024-11-19 01:47:12,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2348 flow [2024-11-19 01:47:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:47:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:47:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 185 transitions. [2024-11-19 01:47:12,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32006920415224915 [2024-11-19 01:47:12,534 INFO L175 Difference]: Start difference. First operand has 116 places, 88 transitions, 945 flow. Second operand 17 states and 185 transitions. [2024-11-19 01:47:12,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2348 flow [2024-11-19 01:47:12,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 2260 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-19 01:47:12,555 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 1686 flow [2024-11-19 01:47:12,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1686, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2024-11-19 01:47:12,555 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-11-19 01:47:12,556 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 1686 flow [2024-11-19 01:47:12,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:12,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:12,558 INFO L204 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, 1, 1] [2024-11-19 01:47:12,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 01:47:12,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 01:47:12,759 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:12,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1290074223, now seen corresponding path program 8 times [2024-11-19 01:47:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332700283] [2024-11-19 01:47:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:12,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:47:12,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:13,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332700283] [2024-11-19 01:47:13,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332700283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:13,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:13,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160386570] [2024-11-19 01:47:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:13,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:13,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:13,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 1686 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:13,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:13,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:14,172 INFO L124 PetriNetUnfolderBase]: 812/1382 cut-off events. [2024-11-19 01:47:14,173 INFO L125 PetriNetUnfolderBase]: For 12013/12013 co-relation queries the response was YES. [2024-11-19 01:47:14,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7999 conditions, 1382 events. 812/1382 cut-off events. For 12013/12013 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6478 event pairs, 317 based on Foata normal form. 1/1382 useless extension candidates. Maximal degree in co-relation 7954. Up to 910 conditions per place. [2024-11-19 01:47:14,181 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 112 selfloop transitions, 50 changer transitions 17/180 dead transitions. [2024-11-19 01:47:14,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 2549 flow [2024-11-19 01:47:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:47:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:47:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 125 transitions. [2024-11-19 01:47:14,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2828054298642534 [2024-11-19 01:47:14,182 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 1686 flow. Second operand 13 states and 125 transitions. [2024-11-19 01:47:14,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 2549 flow [2024-11-19 01:47:14,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 180 transitions, 2387 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-11-19 01:47:14,213 INFO L231 Difference]: Finished difference. Result has 143 places, 139 transitions, 1939 flow [2024-11-19 01:47:14,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1939, PETRI_PLACES=143, PETRI_TRANSITIONS=139} [2024-11-19 01:47:14,214 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-11-19 01:47:14,214 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 139 transitions, 1939 flow [2024-11-19 01:47:14,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:14,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:14,215 INFO L204 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, 1, 1] [2024-11-19 01:47:14,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-19 01:47:14,215 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:14,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 342919245, now seen corresponding path program 9 times [2024-11-19 01:47:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:14,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772583859] [2024-11-19 01:47:14,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:14,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:14,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 01:47:14,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772583859] [2024-11-19 01:47:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772583859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180827673] [2024-11-19 01:47:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:14,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:14,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:14,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 139 transitions, 1939 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:14,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:14,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:14,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:15,545 INFO L124 PetriNetUnfolderBase]: 826/1408 cut-off events. [2024-11-19 01:47:15,546 INFO L125 PetriNetUnfolderBase]: For 12991/12991 co-relation queries the response was YES. [2024-11-19 01:47:15,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8255 conditions, 1408 events. 826/1408 cut-off events. For 12991/12991 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6670 event pairs, 318 based on Foata normal form. 1/1409 useless extension candidates. Maximal degree in co-relation 8204. Up to 935 conditions per place. [2024-11-19 01:47:15,568 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 124 selfloop transitions, 55 changer transitions 10/190 dead transitions. [2024-11-19 01:47:15,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 190 transitions, 2685 flow [2024-11-19 01:47:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:47:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:47:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2024-11-19 01:47:15,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2850678733031674 [2024-11-19 01:47:15,573 INFO L175 Difference]: Start difference. First operand has 143 places, 139 transitions, 1939 flow. Second operand 13 states and 126 transitions. [2024-11-19 01:47:15,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 190 transitions, 2685 flow [2024-11-19 01:47:15,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 2541 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-11-19 01:47:15,655 INFO L231 Difference]: Finished difference. Result has 151 places, 145 transitions, 2030 flow [2024-11-19 01:47:15,659 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2030, PETRI_PLACES=151, PETRI_TRANSITIONS=145} [2024-11-19 01:47:15,659 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-11-19 01:47:15,660 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 145 transitions, 2030 flow [2024-11-19 01:47:15,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:15,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:15,660 INFO L204 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, 1, 1] [2024-11-19 01:47:15,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-19 01:47:15,660 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:15,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 14373931, now seen corresponding path program 10 times [2024-11-19 01:47:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:15,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433823994] [2024-11-19 01:47:15,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:15,698 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:15,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433823994] [2024-11-19 01:47:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433823994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:16,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802718227] [2024-11-19 01:47:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:16,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:47:16,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:16,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 145 transitions, 2030 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:16,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:16,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:16,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:16,792 INFO L124 PetriNetUnfolderBase]: 879/1532 cut-off events. [2024-11-19 01:47:16,792 INFO L125 PetriNetUnfolderBase]: For 13043/13043 co-relation queries the response was YES. [2024-11-19 01:47:16,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8748 conditions, 1532 events. 879/1532 cut-off events. For 13043/13043 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7604 event pairs, 296 based on Foata normal form. 1/1533 useless extension candidates. Maximal degree in co-relation 8695. Up to 802 conditions per place. [2024-11-19 01:47:16,805 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 139 selfloop transitions, 53 changer transitions 17/210 dead transitions. [2024-11-19 01:47:16,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2862 flow [2024-11-19 01:47:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-11-19 01:47:16,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33578431372549017 [2024-11-19 01:47:16,807 INFO L175 Difference]: Start difference. First operand has 151 places, 145 transitions, 2030 flow. Second operand 12 states and 137 transitions. [2024-11-19 01:47:16,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2862 flow [2024-11-19 01:47:16,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 210 transitions, 2797 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-19 01:47:16,849 INFO L231 Difference]: Finished difference. Result has 160 places, 145 transitions, 2158 flow [2024-11-19 01:47:16,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2158, PETRI_PLACES=160, PETRI_TRANSITIONS=145} [2024-11-19 01:47:16,850 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-11-19 01:47:16,850 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 145 transitions, 2158 flow [2024-11-19 01:47:16,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:16,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:16,851 INFO L204 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, 1, 1] [2024-11-19 01:47:16,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-19 01:47:16,851 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:16,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1487098863, now seen corresponding path program 11 times [2024-11-19 01:47:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679020619] [2024-11-19 01:47:16,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:16,869 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:16,869 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:17,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:17,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679020619] [2024-11-19 01:47:17,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679020619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:17,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704488417] [2024-11-19 01:47:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:17,584 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:17,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:47:17,665 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:17,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:17,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 01:47:17,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:17,955 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-19 01:47:17,956 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 83 treesize of output 52 [2024-11-19 01:47:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:18,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:18,643 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:18,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-11-19 01:47:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704488417] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:18,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:47:18,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 31 [2024-11-19 01:47:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712770319] [2024-11-19 01:47:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:18,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2024-11-19 01:47:18,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:18,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 145 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:18,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:18,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:18,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:19,602 INFO L124 PetriNetUnfolderBase]: 861/1503 cut-off events. [2024-11-19 01:47:19,603 INFO L125 PetriNetUnfolderBase]: For 14195/14195 co-relation queries the response was YES. [2024-11-19 01:47:19,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8789 conditions, 1503 events. 861/1503 cut-off events. For 14195/14195 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7446 event pairs, 150 based on Foata normal form. 1/1503 useless extension candidates. Maximal degree in co-relation 8732. Up to 834 conditions per place. [2024-11-19 01:47:19,615 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 74 changer transitions 12/198 dead transitions. [2024-11-19 01:47:19,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 198 transitions, 2778 flow [2024-11-19 01:47:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-11-19 01:47:19,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33403361344537813 [2024-11-19 01:47:19,617 INFO L175 Difference]: Start difference. First operand has 160 places, 145 transitions, 2158 flow. Second operand 14 states and 159 transitions. [2024-11-19 01:47:19,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 198 transitions, 2778 flow [2024-11-19 01:47:19,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 198 transitions, 2709 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-19 01:47:19,676 INFO L231 Difference]: Finished difference. Result has 164 places, 142 transitions, 2186 flow [2024-11-19 01:47:19,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2186, PETRI_PLACES=164, PETRI_TRANSITIONS=142} [2024-11-19 01:47:19,676 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-11-19 01:47:19,677 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 142 transitions, 2186 flow [2024-11-19 01:47:19,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:19,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:19,677 INFO L204 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, 1, 1] [2024-11-19 01:47:19,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:19,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-19 01:47:19,882 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:19,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash -111430679, now seen corresponding path program 12 times [2024-11-19 01:47:19,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:19,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494101952] [2024-11-19 01:47:19,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:19,896 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-19 01:47:19,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:20,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:20,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494101952] [2024-11-19 01:47:20,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494101952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:20,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:20,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200145300] [2024-11-19 01:47:20,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:20,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:20,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:20,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 142 transitions, 2186 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:20,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:20,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:20,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:20,685 INFO L124 PetriNetUnfolderBase]: 853/1486 cut-off events. [2024-11-19 01:47:20,686 INFO L125 PetriNetUnfolderBase]: For 14012/14012 co-relation queries the response was YES. [2024-11-19 01:47:20,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8765 conditions, 1486 events. 853/1486 cut-off events. For 14012/14012 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7279 event pairs, 368 based on Foata normal form. 2/1487 useless extension candidates. Maximal degree in co-relation 8711. Up to 1029 conditions per place. [2024-11-19 01:47:20,694 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 116 selfloop transitions, 57 changer transitions 11/185 dead transitions. [2024-11-19 01:47:20,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 185 transitions, 2944 flow [2024-11-19 01:47:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-11-19 01:47:20,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28431372549019607 [2024-11-19 01:47:20,695 INFO L175 Difference]: Start difference. First operand has 164 places, 142 transitions, 2186 flow. Second operand 12 states and 116 transitions. [2024-11-19 01:47:20,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 185 transitions, 2944 flow [2024-11-19 01:47:20,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 185 transitions, 2774 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-11-19 01:47:20,728 INFO L231 Difference]: Finished difference. Result has 162 places, 147 transitions, 2258 flow [2024-11-19 01:47:20,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2258, PETRI_PLACES=162, PETRI_TRANSITIONS=147} [2024-11-19 01:47:20,729 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-11-19 01:47:20,729 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 147 transitions, 2258 flow [2024-11-19 01:47:20,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:20,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:20,729 INFO L204 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, 1, 1] [2024-11-19 01:47:20,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-19 01:47:20,729 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:20,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:20,730 INFO L85 PathProgramCache]: Analyzing trace with hash 659047303, now seen corresponding path program 13 times [2024-11-19 01:47:20,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:20,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577266105] [2024-11-19 01:47:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:20,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:21,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:21,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577266105] [2024-11-19 01:47:21,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577266105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:21,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967243796] [2024-11-19 01:47:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:21,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:47:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:21,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 01:47:21,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:21,747 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-19 01:47:21,748 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 83 treesize of output 52 [2024-11-19 01:47:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:21,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:22,605 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:22,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-11-19 01:47:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967243796] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:22,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:47:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-11-19 01:47:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021247938] [2024-11-19 01:47:22,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:22,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 01:47:22,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:22,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 147 transitions, 2258 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:22,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:22,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:22,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:23,685 INFO L124 PetriNetUnfolderBase]: 821/1420 cut-off events. [2024-11-19 01:47:23,686 INFO L125 PetriNetUnfolderBase]: For 12312/12312 co-relation queries the response was YES. [2024-11-19 01:47:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8500 conditions, 1420 events. 821/1420 cut-off events. For 12312/12312 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6834 event pairs, 138 based on Foata normal form. 1/1421 useless extension candidates. Maximal degree in co-relation 8443. Up to 802 conditions per place. [2024-11-19 01:47:23,695 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 76 changer transitions 11/200 dead transitions. [2024-11-19 01:47:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 200 transitions, 2902 flow [2024-11-19 01:47:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-11-19 01:47:23,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-11-19 01:47:23,701 INFO L175 Difference]: Start difference. First operand has 162 places, 147 transitions, 2258 flow. Second operand 14 states and 153 transitions. [2024-11-19 01:47:23,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 200 transitions, 2902 flow [2024-11-19 01:47:23,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 200 transitions, 2804 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:23,735 INFO L231 Difference]: Finished difference. Result has 167 places, 144 transitions, 2263 flow [2024-11-19 01:47:23,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2263, PETRI_PLACES=167, PETRI_TRANSITIONS=144} [2024-11-19 01:47:23,736 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-11-19 01:47:23,736 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 144 transitions, 2263 flow [2024-11-19 01:47:23,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:23,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:23,736 INFO L204 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, 1, 1] [2024-11-19 01:47:23,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 01:47:23,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-19 01:47:23,941 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:23,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash -771391655, now seen corresponding path program 14 times [2024-11-19 01:47:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:23,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167914896] [2024-11-19 01:47:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:23,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 01:47:23,960 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:24,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:24,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167914896] [2024-11-19 01:47:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167914896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:24,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:24,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427782789] [2024-11-19 01:47:24,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:24,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:24,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:24,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 144 transitions, 2263 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:24,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:24,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:24,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:24,865 INFO L124 PetriNetUnfolderBase]: 829/1435 cut-off events. [2024-11-19 01:47:24,866 INFO L125 PetriNetUnfolderBase]: For 12257/12257 co-relation queries the response was YES. [2024-11-19 01:47:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8703 conditions, 1435 events. 829/1435 cut-off events. For 12257/12257 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6903 event pairs, 380 based on Foata normal form. 1/1435 useless extension candidates. Maximal degree in co-relation 8648. Up to 1021 conditions per place. [2024-11-19 01:47:24,876 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 113 selfloop transitions, 54 changer transitions 9/177 dead transitions. [2024-11-19 01:47:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 177 transitions, 2840 flow [2024-11-19 01:47:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-11-19 01:47:24,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2914438502673797 [2024-11-19 01:47:24,877 INFO L175 Difference]: Start difference. First operand has 167 places, 144 transitions, 2263 flow. Second operand 11 states and 109 transitions. [2024-11-19 01:47:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 177 transitions, 2840 flow [2024-11-19 01:47:24,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 177 transitions, 2670 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-11-19 01:47:24,923 INFO L231 Difference]: Finished difference. Result has 160 places, 147 transitions, 2264 flow [2024-11-19 01:47:24,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2264, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2024-11-19 01:47:24,923 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-11-19 01:47:24,924 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 2264 flow [2024-11-19 01:47:24,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:24,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:24,924 INFO L204 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, 1, 1] [2024-11-19 01:47:24,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-19 01:47:24,924 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:24,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash 241300877, now seen corresponding path program 15 times [2024-11-19 01:47:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:24,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774211504] [2024-11-19 01:47:24,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:24,947 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 01:47:24,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:25,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774211504] [2024-11-19 01:47:25,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774211504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:25,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:25,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 01:47:25,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866788478] [2024-11-19 01:47:25,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:25,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:25,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:25,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 147 transitions, 2264 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:25,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:25,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:25,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:25,867 INFO L124 PetriNetUnfolderBase]: 817/1404 cut-off events. [2024-11-19 01:47:25,868 INFO L125 PetriNetUnfolderBase]: For 12251/12251 co-relation queries the response was YES. [2024-11-19 01:47:25,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8426 conditions, 1404 events. 817/1404 cut-off events. For 12251/12251 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6661 event pairs, 365 based on Foata normal form. 1/1405 useless extension candidates. Maximal degree in co-relation 8371. Up to 994 conditions per place. [2024-11-19 01:47:25,874 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 112 selfloop transitions, 55 changer transitions 9/177 dead transitions. [2024-11-19 01:47:25,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 177 transitions, 2753 flow [2024-11-19 01:47:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2024-11-19 01:47:25,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27450980392156865 [2024-11-19 01:47:25,876 INFO L175 Difference]: Start difference. First operand has 160 places, 147 transitions, 2264 flow. Second operand 12 states and 112 transitions. [2024-11-19 01:47:25,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 177 transitions, 2753 flow [2024-11-19 01:47:25,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 177 transitions, 2691 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:25,903 INFO L231 Difference]: Finished difference. Result has 166 places, 145 transitions, 2287 flow [2024-11-19 01:47:25,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2287, PETRI_PLACES=166, PETRI_TRANSITIONS=145} [2024-11-19 01:47:25,907 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-11-19 01:47:25,907 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 145 transitions, 2287 flow [2024-11-19 01:47:25,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:25,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:25,908 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:25,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-19 01:47:25,908 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:25,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -205059009, now seen corresponding path program 1 times [2024-11-19 01:47:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:25,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270782657] [2024-11-19 01:47:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:47:25,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:26,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270782657] [2024-11-19 01:47:26,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270782657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671768786] [2024-11-19 01:47:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:47:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:26,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:26,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:47:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:26,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:47:26,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:26,203 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 01:47:26,203 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 26 treesize of output 10 [2024-11-19 01:47:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:26,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:26,277 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:26,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-19 01:47:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671768786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:26,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:26,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-11-19 01:47:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967219535] [2024-11-19 01:47:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:26,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:47:26,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:47:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:47:26,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:26,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 145 transitions, 2287 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 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) [2024-11-19 01:47:26,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:26,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:26,859 INFO L124 PetriNetUnfolderBase]: 857/1463 cut-off events. [2024-11-19 01:47:26,860 INFO L125 PetriNetUnfolderBase]: For 15322/15322 co-relation queries the response was YES. [2024-11-19 01:47:26,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9028 conditions, 1463 events. 857/1463 cut-off events. For 15322/15322 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7153 event pairs, 160 based on Foata normal form. 18/1481 useless extension candidates. Maximal degree in co-relation 8972. Up to 682 conditions per place. [2024-11-19 01:47:26,870 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 167 selfloop transitions, 50 changer transitions 0/218 dead transitions. [2024-11-19 01:47:26,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 218 transitions, 3437 flow [2024-11-19 01:47:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-11-19 01:47:26,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-19 01:47:26,871 INFO L175 Difference]: Start difference. First operand has 166 places, 145 transitions, 2287 flow. Second operand 10 states and 119 transitions. [2024-11-19 01:47:26,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 218 transitions, 3437 flow [2024-11-19 01:47:26,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 218 transitions, 3260 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-11-19 01:47:26,909 INFO L231 Difference]: Finished difference. Result has 163 places, 149 transitions, 2324 flow [2024-11-19 01:47:26,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2324, PETRI_PLACES=163, PETRI_TRANSITIONS=149} [2024-11-19 01:47:26,909 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-11-19 01:47:26,910 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 149 transitions, 2324 flow [2024-11-19 01:47:26,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 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) [2024-11-19 01:47:26,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:26,910 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:26,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:27,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:27,112 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:27,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1203116737, now seen corresponding path program 1 times [2024-11-19 01:47:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:27,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614374982] [2024-11-19 01:47:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:47:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:27,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:27,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614374982] [2024-11-19 01:47:27,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614374982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:27,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701855310] [2024-11-19 01:47:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:27,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:27,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:27,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 149 transitions, 2324 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:27,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:27,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:27,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:27,683 INFO L124 PetriNetUnfolderBase]: 949/1603 cut-off events. [2024-11-19 01:47:27,684 INFO L125 PetriNetUnfolderBase]: For 16181/16181 co-relation queries the response was YES. [2024-11-19 01:47:27,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10184 conditions, 1603 events. 949/1603 cut-off events. For 16181/16181 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7856 event pairs, 414 based on Foata normal form. 12/1615 useless extension candidates. Maximal degree in co-relation 10128. Up to 1171 conditions per place. [2024-11-19 01:47:27,698 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 137 selfloop transitions, 51 changer transitions 0/189 dead transitions. [2024-11-19 01:47:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 189 transitions, 3112 flow [2024-11-19 01:47:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-11-19 01:47:27,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33986928104575165 [2024-11-19 01:47:27,699 INFO L175 Difference]: Start difference. First operand has 163 places, 149 transitions, 2324 flow. Second operand 9 states and 104 transitions. [2024-11-19 01:47:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 189 transitions, 3112 flow [2024-11-19 01:47:27,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 189 transitions, 2949 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:27,804 INFO L231 Difference]: Finished difference. Result has 165 places, 155 transitions, 2404 flow [2024-11-19 01:47:27,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2404, PETRI_PLACES=165, PETRI_TRANSITIONS=155} [2024-11-19 01:47:27,805 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-11-19 01:47:27,805 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 155 transitions, 2404 flow [2024-11-19 01:47:27,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:27,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:27,805 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:27,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-19 01:47:27,806 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:27,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1513104541, now seen corresponding path program 2 times [2024-11-19 01:47:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006107687] [2024-11-19 01:47:27,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:27,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:27,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:27,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:27,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006107687] [2024-11-19 01:47:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006107687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122879915] [2024-11-19 01:47:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:27,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:27,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:27,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 155 transitions, 2404 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:27,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:27,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:27,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:28,326 INFO L124 PetriNetUnfolderBase]: 932/1586 cut-off events. [2024-11-19 01:47:28,326 INFO L125 PetriNetUnfolderBase]: For 14467/14467 co-relation queries the response was YES. [2024-11-19 01:47:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9790 conditions, 1586 events. 932/1586 cut-off events. For 14467/14467 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7899 event pairs, 324 based on Foata normal form. 17/1603 useless extension candidates. Maximal degree in co-relation 9735. Up to 910 conditions per place. [2024-11-19 01:47:28,336 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 142 selfloop transitions, 47 changer transitions 21/211 dead transitions. [2024-11-19 01:47:28,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 211 transitions, 3193 flow [2024-11-19 01:47:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-11-19 01:47:28,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31862745098039214 [2024-11-19 01:47:28,337 INFO L175 Difference]: Start difference. First operand has 165 places, 155 transitions, 2404 flow. Second operand 12 states and 130 transitions. [2024-11-19 01:47:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 211 transitions, 3193 flow [2024-11-19 01:47:28,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 211 transitions, 3103 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:28,378 INFO L231 Difference]: Finished difference. Result has 172 places, 145 transitions, 2254 flow [2024-11-19 01:47:28,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2254, PETRI_PLACES=172, PETRI_TRANSITIONS=145} [2024-11-19 01:47:28,378 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-19 01:47:28,378 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 145 transitions, 2254 flow [2024-11-19 01:47:28,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:28,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:28,379 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:28,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-11-19 01:47:28,379 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:28,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1644889591, now seen corresponding path program 3 times [2024-11-19 01:47:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:28,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130336120] [2024-11-19 01:47:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:28,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:28,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:28,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130336120] [2024-11-19 01:47:28,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130336120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821345635] [2024-11-19 01:47:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:28,547 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:47:28,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:28,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:28,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 01:47:28,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:28,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:47:28,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-19 01:47:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:28,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:28,738 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 01:47:28,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 01:47:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821345635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:28,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-19 01:47:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962897394] [2024-11-19 01:47:28,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:28,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:47:28,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:47:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:47:28,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:28,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 145 transitions, 2254 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 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) [2024-11-19 01:47:28,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:28,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:28,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:29,362 INFO L124 PetriNetUnfolderBase]: 1081/1820 cut-off events. [2024-11-19 01:47:29,363 INFO L125 PetriNetUnfolderBase]: For 19715/19715 co-relation queries the response was YES. [2024-11-19 01:47:29,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11499 conditions, 1820 events. 1081/1820 cut-off events. For 19715/19715 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9207 event pairs, 403 based on Foata normal form. 20/1840 useless extension candidates. Maximal degree in co-relation 11443. Up to 1158 conditions per place. [2024-11-19 01:47:29,375 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 154 selfloop transitions, 69 changer transitions 0/224 dead transitions. [2024-11-19 01:47:29,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 224 transitions, 3524 flow [2024-11-19 01:47:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:47:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:47:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 162 transitions. [2024-11-19 01:47:29,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2977941176470588 [2024-11-19 01:47:29,376 INFO L175 Difference]: Start difference. First operand has 172 places, 145 transitions, 2254 flow. Second operand 16 states and 162 transitions. [2024-11-19 01:47:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 224 transitions, 3524 flow [2024-11-19 01:47:29,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 224 transitions, 3318 flow, removed 24 selfloop flow, removed 16 redundant places. [2024-11-19 01:47:29,426 INFO L231 Difference]: Finished difference. Result has 170 places, 168 transitions, 2698 flow [2024-11-19 01:47:29,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2698, PETRI_PLACES=170, PETRI_TRANSITIONS=168} [2024-11-19 01:47:29,426 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-11-19 01:47:29,426 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 168 transitions, 2698 flow [2024-11-19 01:47:29,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 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) [2024-11-19 01:47:29,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:29,427 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:29,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 01:47:29,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:29,628 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:29,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2134442235, now seen corresponding path program 2 times [2024-11-19 01:47:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406489216] [2024-11-19 01:47:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:29,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:29,641 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:29,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:29,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406489216] [2024-11-19 01:47:29,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406489216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987658015] [2024-11-19 01:47:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:29,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:29,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:47:29,953 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:29,953 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:29,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 01:47:29,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:30,043 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 01:47:30,043 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 26 treesize of output 10 [2024-11-19 01:47:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:30,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:30,140 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:30,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-19 01:47:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987658015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:30,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:30,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-19 01:47:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144925489] [2024-11-19 01:47:30,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:30,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:47:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:47:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:47:30,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:30,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 168 transitions, 2698 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 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) [2024-11-19 01:47:30,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:30,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:30,881 INFO L124 PetriNetUnfolderBase]: 1534/2578 cut-off events. [2024-11-19 01:47:30,881 INFO L125 PetriNetUnfolderBase]: For 24560/24560 co-relation queries the response was YES. [2024-11-19 01:47:30,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16061 conditions, 2578 events. 1534/2578 cut-off events. For 24560/24560 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13941 event pairs, 454 based on Foata normal form. 18/2596 useless extension candidates. Maximal degree in co-relation 16005. Up to 1191 conditions per place. [2024-11-19 01:47:30,897 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 205 selfloop transitions, 88 changer transitions 0/294 dead transitions. [2024-11-19 01:47:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 294 transitions, 4722 flow [2024-11-19 01:47:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-11-19 01:47:30,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2024-11-19 01:47:30,899 INFO L175 Difference]: Start difference. First operand has 170 places, 168 transitions, 2698 flow. Second operand 12 states and 148 transitions. [2024-11-19 01:47:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 294 transitions, 4722 flow [2024-11-19 01:47:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 294 transitions, 4626 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:30,961 INFO L231 Difference]: Finished difference. Result has 182 places, 192 transitions, 3329 flow [2024-11-19 01:47:30,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3329, PETRI_PLACES=182, PETRI_TRANSITIONS=192} [2024-11-19 01:47:30,962 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-11-19 01:47:30,962 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 192 transitions, 3329 flow [2024-11-19 01:47:30,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 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) [2024-11-19 01:47:30,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:30,962 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:30,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 01:47:31,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:31,165 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:31,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1042229925, now seen corresponding path program 4 times [2024-11-19 01:47:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719812298] [2024-11-19 01:47:31,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:31,173 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:31,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:31,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:31,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719812298] [2024-11-19 01:47:31,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719812298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:31,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:47:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438446815] [2024-11-19 01:47:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:31,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:47:31,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:31,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 192 transitions, 3329 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:31,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:31,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:31,805 INFO L124 PetriNetUnfolderBase]: 1566/2630 cut-off events. [2024-11-19 01:47:31,805 INFO L125 PetriNetUnfolderBase]: For 32537/32537 co-relation queries the response was YES. [2024-11-19 01:47:31,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17378 conditions, 2630 events. 1566/2630 cut-off events. For 32537/32537 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14219 event pairs, 685 based on Foata normal form. 20/2650 useless extension candidates. Maximal degree in co-relation 17316. Up to 2023 conditions per place. [2024-11-19 01:47:31,827 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 147 selfloop transitions, 74 changer transitions 0/222 dead transitions. [2024-11-19 01:47:31,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 222 transitions, 4116 flow [2024-11-19 01:47:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:47:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:47:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-19 01:47:31,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2024-11-19 01:47:31,828 INFO L175 Difference]: Start difference. First operand has 182 places, 192 transitions, 3329 flow. Second operand 7 states and 94 transitions. [2024-11-19 01:47:31,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 222 transitions, 4116 flow [2024-11-19 01:47:31,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 222 transitions, 3913 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:31,926 INFO L231 Difference]: Finished difference. Result has 185 places, 201 transitions, 3532 flow [2024-11-19 01:47:31,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3532, PETRI_PLACES=185, PETRI_TRANSITIONS=201} [2024-11-19 01:47:31,926 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-11-19 01:47:31,926 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 201 transitions, 3532 flow [2024-11-19 01:47:31,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:31,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:31,927 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:31,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-11-19 01:47:31,927 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:31,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash -235990641, now seen corresponding path program 5 times [2024-11-19 01:47:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566235868] [2024-11-19 01:47:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:31,942 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:31,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:32,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:32,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566235868] [2024-11-19 01:47:32,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566235868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:32,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153350865] [2024-11-19 01:47:32,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:32,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:32,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:32,215 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:32,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 01:47:32,284 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:32,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:32,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:47:32,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:32,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:47:32,330 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 29 treesize of output 25 [2024-11-19 01:47:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:32,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:47:32,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153350865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:32,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:47:32,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-11-19 01:47:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865880519] [2024-11-19 01:47:32,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:32,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:32,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:47:32,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:32,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 201 transitions, 3532 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:32,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:32,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:32,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:32,892 INFO L124 PetriNetUnfolderBase]: 1546/2610 cut-off events. [2024-11-19 01:47:32,892 INFO L125 PetriNetUnfolderBase]: For 28847/28847 co-relation queries the response was YES. [2024-11-19 01:47:32,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16947 conditions, 2610 events. 1546/2610 cut-off events. For 28847/28847 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14259 event pairs, 645 based on Foata normal form. 20/2629 useless extension candidates. Maximal degree in co-relation 16881. Up to 2023 conditions per place. [2024-11-19 01:47:32,915 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 162 selfloop transitions, 76 changer transitions 0/239 dead transitions. [2024-11-19 01:47:32,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 4350 flow [2024-11-19 01:47:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:47:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:47:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-19 01:47:32,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2024-11-19 01:47:32,917 INFO L175 Difference]: Start difference. First operand has 185 places, 201 transitions, 3532 flow. Second operand 7 states and 94 transitions. [2024-11-19 01:47:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 4350 flow [2024-11-19 01:47:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 239 transitions, 4256 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-11-19 01:47:33,035 INFO L231 Difference]: Finished difference. Result has 191 places, 203 transitions, 3648 flow [2024-11-19 01:47:33,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3648, PETRI_PLACES=191, PETRI_TRANSITIONS=203} [2024-11-19 01:47:33,039 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-11-19 01:47:33,039 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 203 transitions, 3648 flow [2024-11-19 01:47:33,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:33,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:33,039 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:33,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 01:47:33,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:33,240 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:33,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1747895979, now seen corresponding path program 3 times [2024-11-19 01:47:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899098305] [2024-11-19 01:47:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:33,284 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:33,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:33,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:33,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899098305] [2024-11-19 01:47:33,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899098305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:33,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:33,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763525069] [2024-11-19 01:47:33,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:33,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:33,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:33,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 203 transitions, 3648 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:33,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:33,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:33,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:34,240 INFO L124 PetriNetUnfolderBase]: 1547/2617 cut-off events. [2024-11-19 01:47:34,240 INFO L125 PetriNetUnfolderBase]: For 28846/28846 co-relation queries the response was YES. [2024-11-19 01:47:34,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17076 conditions, 2617 events. 1547/2617 cut-off events. For 28846/28846 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14285 event pairs, 687 based on Foata normal form. 6/2622 useless extension candidates. Maximal degree in co-relation 17009. Up to 2016 conditions per place. [2024-11-19 01:47:34,264 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 139 selfloop transitions, 75 changer transitions 8/223 dead transitions. [2024-11-19 01:47:34,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 223 transitions, 4209 flow [2024-11-19 01:47:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-11-19 01:47:34,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27540106951871657 [2024-11-19 01:47:34,265 INFO L175 Difference]: Start difference. First operand has 191 places, 203 transitions, 3648 flow. Second operand 11 states and 103 transitions. [2024-11-19 01:47:34,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 223 transitions, 4209 flow [2024-11-19 01:47:34,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 223 transitions, 4053 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 01:47:34,352 INFO L231 Difference]: Finished difference. Result has 199 places, 201 transitions, 3605 flow [2024-11-19 01:47:34,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3605, PETRI_PLACES=199, PETRI_TRANSITIONS=201} [2024-11-19 01:47:34,353 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-11-19 01:47:34,353 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 201 transitions, 3605 flow [2024-11-19 01:47:34,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:34,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:34,353 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:34,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-11-19 01:47:34,354 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:34,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1551644783, now seen corresponding path program 4 times [2024-11-19 01:47:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:34,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423602865] [2024-11-19 01:47:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:34,360 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:34,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423602865] [2024-11-19 01:47:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423602865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946800368] [2024-11-19 01:47:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:34,441 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:34,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 01:47:34,515 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:34,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:34,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:47:34,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:34,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:47:34,550 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 29 treesize of output 25 [2024-11-19 01:47:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:34,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:34,644 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:34,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-19 01:47:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:34,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946800368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:34,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:34,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 01:47:34,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278680122] [2024-11-19 01:47:34,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:34,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:47:34,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:47:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:47:34,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:34,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 201 transitions, 3605 flow. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:34,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:34,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:34,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:35,464 INFO L124 PetriNetUnfolderBase]: 1730/2969 cut-off events. [2024-11-19 01:47:35,465 INFO L125 PetriNetUnfolderBase]: For 31098/31098 co-relation queries the response was YES. [2024-11-19 01:47:35,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18418 conditions, 2969 events. 1730/2969 cut-off events. For 31098/31098 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16995 event pairs, 592 based on Foata normal form. 27/2996 useless extension candidates. Maximal degree in co-relation 18349. Up to 1577 conditions per place. [2024-11-19 01:47:35,493 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 225 selfloop transitions, 104 changer transitions 0/330 dead transitions. [2024-11-19 01:47:35,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 330 transitions, 5388 flow [2024-11-19 01:47:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 01:47:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 01:47:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 187 transitions. [2024-11-19 01:47:35,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-19 01:47:35,494 INFO L175 Difference]: Start difference. First operand has 199 places, 201 transitions, 3605 flow. Second operand 15 states and 187 transitions. [2024-11-19 01:47:35,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 330 transitions, 5388 flow [2024-11-19 01:47:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 330 transitions, 5199 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-11-19 01:47:35,652 INFO L231 Difference]: Finished difference. Result has 205 places, 220 transitions, 3997 flow [2024-11-19 01:47:35,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3997, PETRI_PLACES=205, PETRI_TRANSITIONS=220} [2024-11-19 01:47:35,652 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-11-19 01:47:35,652 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 220 transitions, 3997 flow [2024-11-19 01:47:35,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:35,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:35,653 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:35,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:35,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:35,854 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:35,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 399910681, now seen corresponding path program 6 times [2024-11-19 01:47:35,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:35,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68785564] [2024-11-19 01:47:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:35,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:35,870 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:47:35,870 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:36,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68785564] [2024-11-19 01:47:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68785564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:36,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:36,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:36,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473306188] [2024-11-19 01:47:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:36,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:36,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:36,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:36,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 220 transitions, 3997 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:36,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:36,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:36,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:36,607 INFO L124 PetriNetUnfolderBase]: 1747/3007 cut-off events. [2024-11-19 01:47:36,607 INFO L125 PetriNetUnfolderBase]: For 32515/32515 co-relation queries the response was YES. [2024-11-19 01:47:36,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19105 conditions, 3007 events. 1747/3007 cut-off events. For 32515/32515 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17368 event pairs, 815 based on Foata normal form. 7/3013 useless extension candidates. Maximal degree in co-relation 19034. Up to 2386 conditions per place. [2024-11-19 01:47:36,633 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 172 selfloop transitions, 79 changer transitions 9/261 dead transitions. [2024-11-19 01:47:36,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 261 transitions, 4875 flow [2024-11-19 01:47:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-11-19 01:47:36,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-11-19 01:47:36,634 INFO L175 Difference]: Start difference. First operand has 205 places, 220 transitions, 3997 flow. Second operand 11 states and 110 transitions. [2024-11-19 01:47:36,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 261 transitions, 4875 flow [2024-11-19 01:47:36,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 4812 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-19 01:47:36,741 INFO L231 Difference]: Finished difference. Result has 216 places, 222 transitions, 4159 flow [2024-11-19 01:47:36,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4159, PETRI_PLACES=216, PETRI_TRANSITIONS=222} [2024-11-19 01:47:36,741 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-11-19 01:47:36,741 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 222 transitions, 4159 flow [2024-11-19 01:47:36,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:36,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:36,742 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:36,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-11-19 01:47:36,742 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:36,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1462635089, now seen corresponding path program 5 times [2024-11-19 01:47:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980334822] [2024-11-19 01:47:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:36,752 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:36,753 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980334822] [2024-11-19 01:47:36,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980334822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85349681] [2024-11-19 01:47:36,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:36,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:36,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:36,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 01:47:36,994 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:36,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:36,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 01:47:36,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:37,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:47:37,065 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 29 treesize of output 25 [2024-11-19 01:47:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:37,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:47:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85349681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:37,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:47:37,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-19 01:47:37,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16479385] [2024-11-19 01:47:37,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:37,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:37,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:47:37,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 222 transitions, 4159 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:37,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:37,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:37,679 INFO L124 PetriNetUnfolderBase]: 1606/2720 cut-off events. [2024-11-19 01:47:37,679 INFO L125 PetriNetUnfolderBase]: For 31656/31656 co-relation queries the response was YES. [2024-11-19 01:47:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18010 conditions, 2720 events. 1606/2720 cut-off events. For 31656/31656 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15020 event pairs, 712 based on Foata normal form. 6/2726 useless extension candidates. Maximal degree in co-relation 17934. Up to 2136 conditions per place. [2024-11-19 01:47:37,700 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 165 selfloop transitions, 75 changer transitions 5/246 dead transitions. [2024-11-19 01:47:37,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 246 transitions, 4742 flow [2024-11-19 01:47:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-11-19 01:47:37,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2024-11-19 01:47:37,702 INFO L175 Difference]: Start difference. First operand has 216 places, 222 transitions, 4159 flow. Second operand 10 states and 98 transitions. [2024-11-19 01:47:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 246 transitions, 4742 flow [2024-11-19 01:47:37,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 246 transitions, 4612 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:37,801 INFO L231 Difference]: Finished difference. Result has 213 places, 214 transitions, 3993 flow [2024-11-19 01:47:37,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3993, PETRI_PLACES=213, PETRI_TRANSITIONS=214} [2024-11-19 01:47:37,801 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-11-19 01:47:37,801 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 214 transitions, 3993 flow [2024-11-19 01:47:37,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:37,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:37,801 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:37,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:38,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:38,005 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:38,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash -390428159, now seen corresponding path program 7 times [2024-11-19 01:47:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923184832] [2024-11-19 01:47:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:38,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:38,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923184832] [2024-11-19 01:47:38,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923184832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:38,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487384986] [2024-11-19 01:47:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:38,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:38,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:38,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 214 transitions, 3993 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:38,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:38,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:38,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:38,765 INFO L124 PetriNetUnfolderBase]: 1596/2704 cut-off events. [2024-11-19 01:47:38,765 INFO L125 PetriNetUnfolderBase]: For 31991/31991 co-relation queries the response was YES. [2024-11-19 01:47:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17812 conditions, 2704 events. 1596/2704 cut-off events. For 31991/31991 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14887 event pairs, 716 based on Foata normal form. 7/2711 useless extension candidates. Maximal degree in co-relation 17739. Up to 2124 conditions per place. [2024-11-19 01:47:38,789 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 163 selfloop transitions, 73 changer transitions 6/243 dead transitions. [2024-11-19 01:47:38,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 243 transitions, 4650 flow [2024-11-19 01:47:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-11-19 01:47:38,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2024-11-19 01:47:38,790 INFO L175 Difference]: Start difference. First operand has 213 places, 214 transitions, 3993 flow. Second operand 10 states and 98 transitions. [2024-11-19 01:47:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 243 transitions, 4650 flow [2024-11-19 01:47:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 243 transitions, 4452 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:38,895 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 3843 flow [2024-11-19 01:47:38,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3843, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2024-11-19 01:47:38,896 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 180 predicate places. [2024-11-19 01:47:38,896 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 3843 flow [2024-11-19 01:47:38,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:38,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:38,896 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:38,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-11-19 01:47:38,897 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:38,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1354285777, now seen corresponding path program 6 times [2024-11-19 01:47:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874101342] [2024-11-19 01:47:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:38,910 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:47:38,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:39,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874101342] [2024-11-19 01:47:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874101342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187784834] [2024-11-19 01:47:39,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:39,133 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:39,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 01:47:39,208 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:47:39,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:39,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 01:47:39,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:39,275 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 01:47:39,275 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 26 treesize of output 10 [2024-11-19 01:47:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:39,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:39,338 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 01:47:39,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 01:47:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187784834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:39,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:39,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-19 01:47:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219075440] [2024-11-19 01:47:39,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:39,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:47:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:47:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:47:39,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:39,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 3843 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:39,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:39,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:39,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:39,961 INFO L124 PetriNetUnfolderBase]: 1776/2985 cut-off events. [2024-11-19 01:47:39,962 INFO L125 PetriNetUnfolderBase]: For 39314/39314 co-relation queries the response was YES. [2024-11-19 01:47:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20152 conditions, 2985 events. 1776/2985 cut-off events. For 39314/39314 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16667 event pairs, 728 based on Foata normal form. 27/3012 useless extension candidates. Maximal degree in co-relation 20079. Up to 2197 conditions per place. [2024-11-19 01:47:39,989 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 178 selfloop transitions, 79 changer transitions 0/258 dead transitions. [2024-11-19 01:47:39,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 258 transitions, 4900 flow [2024-11-19 01:47:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-19 01:47:39,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3205882352941177 [2024-11-19 01:47:39,991 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 3843 flow. Second operand 10 states and 109 transitions. [2024-11-19 01:47:39,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 258 transitions, 4900 flow [2024-11-19 01:47:40,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 258 transitions, 4719 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-19 01:47:40,117 INFO L231 Difference]: Finished difference. Result has 208 places, 217 transitions, 3997 flow [2024-11-19 01:47:40,117 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3997, PETRI_PLACES=208, PETRI_TRANSITIONS=217} [2024-11-19 01:47:40,117 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-11-19 01:47:40,117 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 217 transitions, 3997 flow [2024-11-19 01:47:40,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:40,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:40,118 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:40,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:40,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-19 01:47:40,321 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:40,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1924189995, now seen corresponding path program 7 times [2024-11-19 01:47:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492994239] [2024-11-19 01:47:40,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:40,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492994239] [2024-11-19 01:47:40,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492994239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:40,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:40,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:40,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097065926] [2024-11-19 01:47:40,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:40,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:40,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:40,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:40,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 217 transitions, 3997 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:40,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:40,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:41,140 INFO L124 PetriNetUnfolderBase]: 1815/3051 cut-off events. [2024-11-19 01:47:41,140 INFO L125 PetriNetUnfolderBase]: For 43346/43346 co-relation queries the response was YES. [2024-11-19 01:47:41,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20996 conditions, 3051 events. 1815/3051 cut-off events. For 43346/43346 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17164 event pairs, 801 based on Foata normal form. 27/3078 useless extension candidates. Maximal degree in co-relation 20923. Up to 2440 conditions per place. [2024-11-19 01:47:41,162 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 164 selfloop transitions, 76 changer transitions 0/241 dead transitions. [2024-11-19 01:47:41,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 241 transitions, 4675 flow [2024-11-19 01:47:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-11-19 01:47:41,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-11-19 01:47:41,164 INFO L175 Difference]: Start difference. First operand has 208 places, 217 transitions, 3997 flow. Second operand 9 states and 99 transitions. [2024-11-19 01:47:41,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 241 transitions, 4675 flow [2024-11-19 01:47:41,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 241 transitions, 4530 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-19 01:47:41,282 INFO L231 Difference]: Finished difference. Result has 211 places, 219 transitions, 4069 flow [2024-11-19 01:47:41,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4069, PETRI_PLACES=211, PETRI_TRANSITIONS=219} [2024-11-19 01:47:41,282 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-11-19 01:47:41,282 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 219 transitions, 4069 flow [2024-11-19 01:47:41,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:41,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:41,283 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:41,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-11-19 01:47:41,283 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:41,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2038108469, now seen corresponding path program 8 times [2024-11-19 01:47:41,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648557889] [2024-11-19 01:47:41,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:41,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:41,299 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:41,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:41,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:41,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648557889] [2024-11-19 01:47:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648557889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:41,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:41,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:41,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552485903] [2024-11-19 01:47:41,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:41,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:41,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:41,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 219 transitions, 4069 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:41,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:41,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:41,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:42,301 INFO L124 PetriNetUnfolderBase]: 1816/3058 cut-off events. [2024-11-19 01:47:42,302 INFO L125 PetriNetUnfolderBase]: For 39554/39554 co-relation queries the response was YES. [2024-11-19 01:47:42,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20996 conditions, 3058 events. 1816/3058 cut-off events. For 39554/39554 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17254 event pairs, 812 based on Foata normal form. 6/3064 useless extension candidates. Maximal degree in co-relation 20922. Up to 2481 conditions per place. [2024-11-19 01:47:42,332 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 156 selfloop transitions, 73 changer transitions 5/235 dead transitions. [2024-11-19 01:47:42,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 235 transitions, 4624 flow [2024-11-19 01:47:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-11-19 01:47:42,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2024-11-19 01:47:42,333 INFO L175 Difference]: Start difference. First operand has 211 places, 219 transitions, 4069 flow. Second operand 10 states and 98 transitions. [2024-11-19 01:47:42,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 235 transitions, 4624 flow [2024-11-19 01:47:42,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 235 transitions, 4463 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:42,468 INFO L231 Difference]: Finished difference. Result has 213 places, 218 transitions, 4033 flow [2024-11-19 01:47:42,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4033, PETRI_PLACES=213, PETRI_TRANSITIONS=218} [2024-11-19 01:47:42,468 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-11-19 01:47:42,468 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 218 transitions, 4033 flow [2024-11-19 01:47:42,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:42,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:42,469 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:42,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-11-19 01:47:42,469 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:42,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 745405499, now seen corresponding path program 9 times [2024-11-19 01:47:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099044736] [2024-11-19 01:47:42,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:42,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:42,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:42,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:42,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099044736] [2024-11-19 01:47:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099044736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:42,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712060381] [2024-11-19 01:47:42,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:42,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:42,704 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:42,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 01:47:42,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:42,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:42,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 01:47:42,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:42,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:47:42,860 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 29 treesize of output 21 [2024-11-19 01:47:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:42,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:42,953 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 01:47:42,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 01:47:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712060381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:42,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:42,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-19 01:47:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274091266] [2024-11-19 01:47:42,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:42,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:47:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:47:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:47:42,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:42,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 218 transitions, 4033 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 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) [2024-11-19 01:47:42,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:42,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:42,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:43,824 INFO L124 PetriNetUnfolderBase]: 1837/3136 cut-off events. [2024-11-19 01:47:43,824 INFO L125 PetriNetUnfolderBase]: For 38758/38758 co-relation queries the response was YES. [2024-11-19 01:47:43,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 3136 events. 1837/3136 cut-off events. For 38758/38758 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18044 event pairs, 754 based on Foata normal form. 27/3163 useless extension candidates. Maximal degree in co-relation 20618. Up to 2295 conditions per place. [2024-11-19 01:47:43,854 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 198 selfloop transitions, 90 changer transitions 0/289 dead transitions. [2024-11-19 01:47:43,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 5194 flow [2024-11-19 01:47:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:47:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:47:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-11-19 01:47:43,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-11-19 01:47:43,856 INFO L175 Difference]: Start difference. First operand has 213 places, 218 transitions, 4033 flow. Second operand 16 states and 160 transitions. [2024-11-19 01:47:43,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 5194 flow [2024-11-19 01:47:43,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 5028 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:43,983 INFO L231 Difference]: Finished difference. Result has 223 places, 231 transitions, 4310 flow [2024-11-19 01:47:43,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4310, PETRI_PLACES=223, PETRI_TRANSITIONS=231} [2024-11-19 01:47:43,984 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-11-19 01:47:43,984 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 231 transitions, 4310 flow [2024-11-19 01:47:43,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 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) [2024-11-19 01:47:43,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:43,985 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:43,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:44,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:44,186 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:44,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1196667443, now seen corresponding path program 8 times [2024-11-19 01:47:44,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:44,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792347883] [2024-11-19 01:47:44,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:44,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:44,216 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:44,216 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792347883] [2024-11-19 01:47:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792347883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:44,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385084603] [2024-11-19 01:47:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:44,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:44,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:44,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 231 transitions, 4310 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:44,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:44,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:45,068 INFO L124 PetriNetUnfolderBase]: 1830/3129 cut-off events. [2024-11-19 01:47:45,068 INFO L125 PetriNetUnfolderBase]: For 37430/37430 co-relation queries the response was YES. [2024-11-19 01:47:45,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20842 conditions, 3129 events. 1830/3129 cut-off events. For 37430/37430 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18120 event pairs, 833 based on Foata normal form. 7/3136 useless extension candidates. Maximal degree in co-relation 20764. Up to 2553 conditions per place. [2024-11-19 01:47:45,099 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 168 selfloop transitions, 70 changer transitions 6/245 dead transitions. [2024-11-19 01:47:45,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 245 transitions, 4811 flow [2024-11-19 01:47:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-11-19 01:47:45,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2852941176470588 [2024-11-19 01:47:45,100 INFO L175 Difference]: Start difference. First operand has 223 places, 231 transitions, 4310 flow. Second operand 10 states and 97 transitions. [2024-11-19 01:47:45,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 245 transitions, 4811 flow [2024-11-19 01:47:45,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 245 transitions, 4704 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-19 01:47:45,325 INFO L231 Difference]: Finished difference. Result has 221 places, 227 transitions, 4248 flow [2024-11-19 01:47:45,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4248, PETRI_PLACES=221, PETRI_TRANSITIONS=227} [2024-11-19 01:47:45,326 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-11-19 01:47:45,326 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 227 transitions, 4248 flow [2024-11-19 01:47:45,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:45,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:45,327 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:45,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-11-19 01:47:45,327 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:45,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash 656395805, now seen corresponding path program 10 times [2024-11-19 01:47:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760446392] [2024-11-19 01:47:45,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:45,339 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:45,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760446392] [2024-11-19 01:47:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760446392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:45,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:45,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:47:45,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909650171] [2024-11-19 01:47:45,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:45,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:45,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:47:45,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:45,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 227 transitions, 4248 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:45,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:45,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:45,830 INFO L124 PetriNetUnfolderBase]: 1731/2933 cut-off events. [2024-11-19 01:47:45,831 INFO L125 PetriNetUnfolderBase]: For 35912/35912 co-relation queries the response was YES. [2024-11-19 01:47:45,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19898 conditions, 2933 events. 1731/2933 cut-off events. For 35912/35912 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16496 event pairs, 775 based on Foata normal form. 6/2939 useless extension candidates. Maximal degree in co-relation 19821. Up to 2377 conditions per place. [2024-11-19 01:47:45,858 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 167 selfloop transitions, 64 changer transitions 5/237 dead transitions. [2024-11-19 01:47:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 237 transitions, 4659 flow [2024-11-19 01:47:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 01:47:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 01:47:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-11-19 01:47:45,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-11-19 01:47:45,859 INFO L175 Difference]: Start difference. First operand has 221 places, 227 transitions, 4248 flow. Second operand 8 states and 88 transitions. [2024-11-19 01:47:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 237 transitions, 4659 flow [2024-11-19 01:47:45,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 237 transitions, 4518 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:45,975 INFO L231 Difference]: Finished difference. Result has 217 places, 220 transitions, 4064 flow [2024-11-19 01:47:45,976 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=217, PETRI_TRANSITIONS=220} [2024-11-19 01:47:45,976 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-11-19 01:47:45,976 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 220 transitions, 4064 flow [2024-11-19 01:47:45,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:45,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:45,977 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:45,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-11-19 01:47:45,977 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:45,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash -343520607, now seen corresponding path program 9 times [2024-11-19 01:47:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:45,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767857702] [2024-11-19 01:47:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:45,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:45,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:46,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767857702] [2024-11-19 01:47:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767857702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:46,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:46,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962288536] [2024-11-19 01:47:46,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:46,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:46,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:46,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:46,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 220 transitions, 4064 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:46,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:46,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:46,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:46,728 INFO L124 PetriNetUnfolderBase]: 1654/2797 cut-off events. [2024-11-19 01:47:46,729 INFO L125 PetriNetUnfolderBase]: For 34233/34233 co-relation queries the response was YES. [2024-11-19 01:47:46,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18969 conditions, 2797 events. 1654/2797 cut-off events. For 34233/34233 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15460 event pairs, 738 based on Foata normal form. 7/2803 useless extension candidates. Maximal degree in co-relation 18892. Up to 2271 conditions per place. [2024-11-19 01:47:46,753 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 163 selfloop transitions, 62 changer transitions 6/232 dead transitions. [2024-11-19 01:47:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 232 transitions, 4488 flow [2024-11-19 01:47:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-11-19 01:47:46,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27941176470588236 [2024-11-19 01:47:46,754 INFO L175 Difference]: Start difference. First operand has 217 places, 220 transitions, 4064 flow. Second operand 10 states and 95 transitions. [2024-11-19 01:47:46,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 232 transitions, 4488 flow [2024-11-19 01:47:46,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 232 transitions, 4348 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:46,878 INFO L231 Difference]: Finished difference. Result has 214 places, 214 transitions, 3902 flow [2024-11-19 01:47:46,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3902, PETRI_PLACES=214, PETRI_TRANSITIONS=214} [2024-11-19 01:47:46,878 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-11-19 01:47:46,878 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 214 transitions, 3902 flow [2024-11-19 01:47:46,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:46,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:46,879 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:46,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-11-19 01:47:46,879 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:46,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1459693281, now seen corresponding path program 10 times [2024-11-19 01:47:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:46,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314874137] [2024-11-19 01:47:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:46,888 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:46,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314874137] [2024-11-19 01:47:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314874137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:46,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:46,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:47:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052637994] [2024-11-19 01:47:46,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:46,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:46,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:46,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:47:46,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:46,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 214 transitions, 3902 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:46,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:46,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:46,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:47,592 INFO L124 PetriNetUnfolderBase]: 1612/2728 cut-off events. [2024-11-19 01:47:47,592 INFO L125 PetriNetUnfolderBase]: For 32725/32725 co-relation queries the response was YES. [2024-11-19 01:47:47,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18356 conditions, 2728 events. 1612/2728 cut-off events. For 32725/32725 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14985 event pairs, 731 based on Foata normal form. 7/2735 useless extension candidates. Maximal degree in co-relation 18281. Up to 2234 conditions per place. [2024-11-19 01:47:47,625 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 163 selfloop transitions, 52 changer transitions 13/229 dead transitions. [2024-11-19 01:47:47,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 229 transitions, 4332 flow [2024-11-19 01:47:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-11-19 01:47:47,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30718954248366015 [2024-11-19 01:47:47,627 INFO L175 Difference]: Start difference. First operand has 214 places, 214 transitions, 3902 flow. Second operand 9 states and 94 transitions. [2024-11-19 01:47:47,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 229 transitions, 4332 flow [2024-11-19 01:47:47,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 229 transitions, 4170 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-19 01:47:47,744 INFO L231 Difference]: Finished difference. Result has 208 places, 205 transitions, 3666 flow [2024-11-19 01:47:47,744 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3666, PETRI_PLACES=208, PETRI_TRANSITIONS=205} [2024-11-19 01:47:47,744 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-11-19 01:47:47,744 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 205 transitions, 3666 flow [2024-11-19 01:47:47,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:47,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:47,745 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:47,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-11-19 01:47:47,745 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:47,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1713036003, now seen corresponding path program 11 times [2024-11-19 01:47:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459648491] [2024-11-19 01:47:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:47,758 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:47,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:47,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459648491] [2024-11-19 01:47:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459648491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191605319] [2024-11-19 01:47:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:47,909 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:47,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 01:47:47,995 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:47,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:47,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 01:47:47,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:48,019 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 01:47:48,019 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 26 treesize of output 10 [2024-11-19 01:47:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:48,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:48,087 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-19 01:47:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-19 01:47:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:48,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191605319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:48,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-19 01:47:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718932062] [2024-11-19 01:47:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:48,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:47:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:47:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:47:48,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:48,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 205 transitions, 3666 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:48,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:48,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:48,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:48,634 INFO L124 PetriNetUnfolderBase]: 1641/2767 cut-off events. [2024-11-19 01:47:48,634 INFO L125 PetriNetUnfolderBase]: For 31467/31467 co-relation queries the response was YES. [2024-11-19 01:47:48,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18644 conditions, 2767 events. 1641/2767 cut-off events. For 31467/31467 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15178 event pairs, 226 based on Foata normal form. 12/2778 useless extension candidates. Maximal degree in co-relation 18571. Up to 1444 conditions per place. [2024-11-19 01:47:48,657 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 182 selfloop transitions, 89 changer transitions 2/274 dead transitions. [2024-11-19 01:47:48,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 274 transitions, 4904 flow [2024-11-19 01:47:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-11-19 01:47:48,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2024-11-19 01:47:48,659 INFO L175 Difference]: Start difference. First operand has 208 places, 205 transitions, 3666 flow. Second operand 9 states and 111 transitions. [2024-11-19 01:47:48,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 274 transitions, 4904 flow [2024-11-19 01:47:48,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 274 transitions, 4730 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-11-19 01:47:48,766 INFO L231 Difference]: Finished difference. Result has 201 places, 208 transitions, 3770 flow [2024-11-19 01:47:48,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3770, PETRI_PLACES=201, PETRI_TRANSITIONS=208} [2024-11-19 01:47:48,766 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-11-19 01:47:48,766 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 208 transitions, 3770 flow [2024-11-19 01:47:48,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:48,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:48,767 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:48,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-19 01:47:48,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:48,970 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:48,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash -348510211, now seen corresponding path program 11 times [2024-11-19 01:47:48,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:48,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757026049] [2024-11-19 01:47:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:48,982 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:48,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:49,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:49,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757026049] [2024-11-19 01:47:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757026049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:49,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879513977] [2024-11-19 01:47:49,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:47:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:49,202 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:49,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 01:47:49,301 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:49,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:49,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 01:47:49,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:49,484 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-19 01:47:49,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-11-19 01:47:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:49,488 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:47:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879513977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:47:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-19 01:47:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146989156] [2024-11-19 01:47:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:49,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:47:49,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:49,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 208 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:49,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:49,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:50,068 INFO L124 PetriNetUnfolderBase]: 1635/2761 cut-off events. [2024-11-19 01:47:50,069 INFO L125 PetriNetUnfolderBase]: For 31387/31387 co-relation queries the response was YES. [2024-11-19 01:47:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18688 conditions, 2761 events. 1635/2761 cut-off events. For 31387/31387 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15183 event pairs, 557 based on Foata normal form. 6/2766 useless extension candidates. Maximal degree in co-relation 18616. Up to 1750 conditions per place. [2024-11-19 01:47:50,101 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 166 selfloop transitions, 79 changer transitions 15/261 dead transitions. [2024-11-19 01:47:50,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 261 transitions, 4612 flow [2024-11-19 01:47:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:47:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:47:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 123 transitions. [2024-11-19 01:47:50,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3014705882352941 [2024-11-19 01:47:50,102 INFO L175 Difference]: Start difference. First operand has 201 places, 208 transitions, 3770 flow. Second operand 12 states and 123 transitions. [2024-11-19 01:47:50,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 261 transitions, 4612 flow [2024-11-19 01:47:50,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 261 transitions, 4423 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-19 01:47:50,227 INFO L231 Difference]: Finished difference. Result has 206 places, 201 transitions, 3587 flow [2024-11-19 01:47:50,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3587, PETRI_PLACES=206, PETRI_TRANSITIONS=201} [2024-11-19 01:47:50,228 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2024-11-19 01:47:50,228 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 201 transitions, 3587 flow [2024-11-19 01:47:50,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:50,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:50,229 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:50,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:50,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:50,431 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:50,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1111993467, now seen corresponding path program 12 times [2024-11-19 01:47:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025040686] [2024-11-19 01:47:50,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:50,444 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:47:50,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:50,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025040686] [2024-11-19 01:47:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025040686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892530022] [2024-11-19 01:47:50,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:50,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:50,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:50,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:50,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 201 transitions, 3587 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:50,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:50,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:50,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:51,158 INFO L124 PetriNetUnfolderBase]: 1704/2860 cut-off events. [2024-11-19 01:47:51,158 INFO L125 PetriNetUnfolderBase]: For 33914/33914 co-relation queries the response was YES. [2024-11-19 01:47:51,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19603 conditions, 2860 events. 1704/2860 cut-off events. For 33914/33914 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15680 event pairs, 632 based on Foata normal form. 12/2872 useless extension candidates. Maximal degree in co-relation 19532. Up to 1964 conditions per place. [2024-11-19 01:47:51,187 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 166 selfloop transitions, 88 changer transitions 0/255 dead transitions. [2024-11-19 01:47:51,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 255 transitions, 4711 flow [2024-11-19 01:47:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-11-19 01:47:51,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3464052287581699 [2024-11-19 01:47:51,188 INFO L175 Difference]: Start difference. First operand has 206 places, 201 transitions, 3587 flow. Second operand 9 states and 106 transitions. [2024-11-19 01:47:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 255 transitions, 4711 flow [2024-11-19 01:47:51,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 255 transitions, 4538 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-19 01:47:51,297 INFO L231 Difference]: Finished difference. Result has 201 places, 207 transitions, 3779 flow [2024-11-19 01:47:51,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3779, PETRI_PLACES=201, PETRI_TRANSITIONS=207} [2024-11-19 01:47:51,298 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-11-19 01:47:51,298 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 207 transitions, 3779 flow [2024-11-19 01:47:51,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:51,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:51,299 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:51,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-11-19 01:47:51,299 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:51,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1061417649, now seen corresponding path program 13 times [2024-11-19 01:47:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586107841] [2024-11-19 01:47:51,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:51,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:51,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586107841] [2024-11-19 01:47:51,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586107841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:51,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:51,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027230677] [2024-11-19 01:47:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:51,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:51,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:51,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 207 transitions, 3779 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:51,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:51,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:51,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:52,095 INFO L124 PetriNetUnfolderBase]: 1724/2892 cut-off events. [2024-11-19 01:47:52,095 INFO L125 PetriNetUnfolderBase]: For 37178/37178 co-relation queries the response was YES. [2024-11-19 01:47:52,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20079 conditions, 2892 events. 1724/2892 cut-off events. For 37178/37178 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15880 event pairs, 663 based on Foata normal form. 12/2904 useless extension candidates. Maximal degree in co-relation 20009. Up to 1994 conditions per place. [2024-11-19 01:47:52,123 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 174 selfloop transitions, 74 changer transitions 1/250 dead transitions. [2024-11-19 01:47:52,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 250 transitions, 4778 flow [2024-11-19 01:47:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-11-19 01:47:52,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3431372549019608 [2024-11-19 01:47:52,125 INFO L175 Difference]: Start difference. First operand has 201 places, 207 transitions, 3779 flow. Second operand 9 states and 105 transitions. [2024-11-19 01:47:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 250 transitions, 4778 flow [2024-11-19 01:47:52,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 250 transitions, 4571 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-11-19 01:47:52,227 INFO L231 Difference]: Finished difference. Result has 205 places, 211 transitions, 3847 flow [2024-11-19 01:47:52,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3847, PETRI_PLACES=205, PETRI_TRANSITIONS=211} [2024-11-19 01:47:52,228 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-11-19 01:47:52,228 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 211 transitions, 3847 flow [2024-11-19 01:47:52,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:52,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:52,228 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:52,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-11-19 01:47:52,228 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:52,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1246459931, now seen corresponding path program 12 times [2024-11-19 01:47:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:52,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615663147] [2024-11-19 01:47:52,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:47:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:52,245 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:47:52,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:52,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615663147] [2024-11-19 01:47:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615663147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:52,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:52,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799407385] [2024-11-19 01:47:52,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:52,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:52,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:52,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 211 transitions, 3847 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:52,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:52,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:52,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:53,021 INFO L124 PetriNetUnfolderBase]: 1712/2872 cut-off events. [2024-11-19 01:47:53,022 INFO L125 PetriNetUnfolderBase]: For 33540/33540 co-relation queries the response was YES. [2024-11-19 01:47:53,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19990 conditions, 2872 events. 1712/2872 cut-off events. For 33540/33540 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15758 event pairs, 653 based on Foata normal form. 6/2878 useless extension candidates. Maximal degree in co-relation 19918. Up to 2063 conditions per place. [2024-11-19 01:47:53,059 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 156 selfloop transitions, 83 changer transitions 7/247 dead transitions. [2024-11-19 01:47:53,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 4614 flow [2024-11-19 01:47:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-11-19 01:47:53,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28342245989304815 [2024-11-19 01:47:53,060 INFO L175 Difference]: Start difference. First operand has 205 places, 211 transitions, 3847 flow. Second operand 11 states and 106 transitions. [2024-11-19 01:47:53,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 4614 flow [2024-11-19 01:47:53,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 247 transitions, 4500 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-19 01:47:53,180 INFO L231 Difference]: Finished difference. Result has 213 places, 210 transitions, 3889 flow [2024-11-19 01:47:53,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3889, PETRI_PLACES=213, PETRI_TRANSITIONS=210} [2024-11-19 01:47:53,181 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-11-19 01:47:53,181 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 210 transitions, 3889 flow [2024-11-19 01:47:53,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:53,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:53,181 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:53,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-11-19 01:47:53,181 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:53,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -926951185, now seen corresponding path program 13 times [2024-11-19 01:47:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016027711] [2024-11-19 01:47:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016027711] [2024-11-19 01:47:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016027711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:53,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090678675] [2024-11-19 01:47:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:53,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:53,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:53,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 210 transitions, 3889 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:53,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:53,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:53,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:53,943 INFO L124 PetriNetUnfolderBase]: 1704/2860 cut-off events. [2024-11-19 01:47:53,943 INFO L125 PetriNetUnfolderBase]: For 34103/34103 co-relation queries the response was YES. [2024-11-19 01:47:53,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20182 conditions, 2860 events. 1704/2860 cut-off events. For 34103/34103 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15686 event pairs, 663 based on Foata normal form. 6/2866 useless extension candidates. Maximal degree in co-relation 20108. Up to 2053 conditions per place. [2024-11-19 01:47:53,975 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 161 selfloop transitions, 67 changer transitions 7/236 dead transitions. [2024-11-19 01:47:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 236 transitions, 4555 flow [2024-11-19 01:47:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:47:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:47:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-11-19 01:47:53,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2807486631016043 [2024-11-19 01:47:53,976 INFO L175 Difference]: Start difference. First operand has 213 places, 210 transitions, 3889 flow. Second operand 11 states and 105 transitions. [2024-11-19 01:47:53,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 236 transitions, 4555 flow [2024-11-19 01:47:54,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 236 transitions, 4481 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:54,097 INFO L231 Difference]: Finished difference. Result has 216 places, 209 transitions, 3940 flow [2024-11-19 01:47:54,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3940, PETRI_PLACES=216, PETRI_TRANSITIONS=209} [2024-11-19 01:47:54,098 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-11-19 01:47:54,098 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 209 transitions, 3940 flow [2024-11-19 01:47:54,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:54,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:54,099 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:54,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-11-19 01:47:54,099 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:54,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash 792132231, now seen corresponding path program 14 times [2024-11-19 01:47:54,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:54,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287319331] [2024-11-19 01:47:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:54,113 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:54,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:54,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287319331] [2024-11-19 01:47:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287319331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:54,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440797639] [2024-11-19 01:47:54,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:54,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:54,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 209 transitions, 3940 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:54,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:54,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:54,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:54,882 INFO L124 PetriNetUnfolderBase]: 1683/2829 cut-off events. [2024-11-19 01:47:54,883 INFO L125 PetriNetUnfolderBase]: For 34380/34380 co-relation queries the response was YES. [2024-11-19 01:47:54,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19898 conditions, 2829 events. 1683/2829 cut-off events. For 34380/34380 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15537 event pairs, 631 based on Foata normal form. 12/2841 useless extension candidates. Maximal degree in co-relation 19823. Up to 2025 conditions per place. [2024-11-19 01:47:54,916 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 160 selfloop transitions, 84 changer transitions 1/246 dead transitions. [2024-11-19 01:47:54,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 246 transitions, 4751 flow [2024-11-19 01:47:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-11-19 01:47:54,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3202614379084967 [2024-11-19 01:47:54,918 INFO L175 Difference]: Start difference. First operand has 216 places, 209 transitions, 3940 flow. Second operand 9 states and 98 transitions. [2024-11-19 01:47:54,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 246 transitions, 4751 flow [2024-11-19 01:47:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 246 transitions, 4621 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:55,032 INFO L231 Difference]: Finished difference. Result has 217 places, 210 transitions, 4005 flow [2024-11-19 01:47:55,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4005, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2024-11-19 01:47:55,033 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-11-19 01:47:55,033 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 4005 flow [2024-11-19 01:47:55,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:55,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:55,033 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:55,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-11-19 01:47:55,034 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:55,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1998606923, now seen corresponding path program 15 times [2024-11-19 01:47:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67176894] [2024-11-19 01:47:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:55,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:55,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67176894] [2024-11-19 01:47:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67176894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109399162] [2024-11-19 01:47:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:55,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:55,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 4005 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:55,735 INFO L124 PetriNetUnfolderBase]: 1709/2867 cut-off events. [2024-11-19 01:47:55,735 INFO L125 PetriNetUnfolderBase]: For 37744/37744 co-relation queries the response was YES. [2024-11-19 01:47:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20487 conditions, 2867 events. 1709/2867 cut-off events. For 37744/37744 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15725 event pairs, 664 based on Foata normal form. 12/2879 useless extension candidates. Maximal degree in co-relation 20411. Up to 2059 conditions per place. [2024-11-19 01:47:55,764 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 166 selfloop transitions, 75 changer transitions 1/243 dead transitions. [2024-11-19 01:47:55,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 243 transitions, 4905 flow [2024-11-19 01:47:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-19 01:47:55,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3137254901960784 [2024-11-19 01:47:55,765 INFO L175 Difference]: Start difference. First operand has 217 places, 210 transitions, 4005 flow. Second operand 9 states and 96 transitions. [2024-11-19 01:47:55,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 243 transitions, 4905 flow [2024-11-19 01:47:55,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 243 transitions, 4719 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 01:47:55,861 INFO L231 Difference]: Finished difference. Result has 221 places, 217 transitions, 4194 flow [2024-11-19 01:47:55,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4194, PETRI_PLACES=221, PETRI_TRANSITIONS=217} [2024-11-19 01:47:55,862 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-11-19 01:47:55,863 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 217 transitions, 4194 flow [2024-11-19 01:47:55,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:55,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:55,863 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:55,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-11-19 01:47:55,864 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:55,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1381278885, now seen corresponding path program 16 times [2024-11-19 01:47:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:55,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314406577] [2024-11-19 01:47:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:55,870 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:55,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:55,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314406577] [2024-11-19 01:47:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314406577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:55,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:55,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:47:55,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389421413] [2024-11-19 01:47:55,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:55,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:47:55,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:55,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 217 transitions, 4194 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:55,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:55,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:55,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:56,397 INFO L124 PetriNetUnfolderBase]: 1697/2855 cut-off events. [2024-11-19 01:47:56,400 INFO L125 PetriNetUnfolderBase]: For 36370/36370 co-relation queries the response was YES. [2024-11-19 01:47:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20175 conditions, 2855 events. 1697/2855 cut-off events. For 36370/36370 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15721 event pairs, 650 based on Foata normal form. 12/2867 useless extension candidates. Maximal degree in co-relation 20097. Up to 2054 conditions per place. [2024-11-19 01:47:56,424 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 168 selfloop transitions, 72 changer transitions 2/243 dead transitions. [2024-11-19 01:47:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 243 transitions, 4886 flow [2024-11-19 01:47:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:47:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:47:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-11-19 01:47:56,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907563025210084 [2024-11-19 01:47:56,425 INFO L175 Difference]: Start difference. First operand has 221 places, 217 transitions, 4194 flow. Second operand 7 states and 93 transitions. [2024-11-19 01:47:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 243 transitions, 4886 flow [2024-11-19 01:47:56,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 243 transitions, 4713 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-11-19 01:47:56,532 INFO L231 Difference]: Finished difference. Result has 218 places, 216 transitions, 4124 flow [2024-11-19 01:47:56,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4124, PETRI_PLACES=218, PETRI_TRANSITIONS=216} [2024-11-19 01:47:56,532 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-11-19 01:47:56,532 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 216 transitions, 4124 flow [2024-11-19 01:47:56,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:56,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:56,533 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:56,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-11-19 01:47:56,533 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:56,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1669704909, now seen corresponding path program 14 times [2024-11-19 01:47:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384312093] [2024-11-19 01:47:56,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:56,543 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:56,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:56,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:56,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384312093] [2024-11-19 01:47:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384312093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:56,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945198971] [2024-11-19 01:47:56,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:56,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:56,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:56,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:56,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 216 transitions, 4124 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:56,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:56,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:56,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:57,209 INFO L124 PetriNetUnfolderBase]: 1729/2906 cut-off events. [2024-11-19 01:47:57,210 INFO L125 PetriNetUnfolderBase]: For 37652/37652 co-relation queries the response was YES. [2024-11-19 01:47:57,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20578 conditions, 2906 events. 1729/2906 cut-off events. For 37652/37652 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16079 event pairs, 645 based on Foata normal form. 27/2932 useless extension candidates. Maximal degree in co-relation 20503. Up to 2084 conditions per place. [2024-11-19 01:47:57,234 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 179 selfloop transitions, 77 changer transitions 2/259 dead transitions. [2024-11-19 01:47:57,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 259 transitions, 5123 flow [2024-11-19 01:47:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:47:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:47:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-11-19 01:47:57,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3366013071895425 [2024-11-19 01:47:57,236 INFO L175 Difference]: Start difference. First operand has 218 places, 216 transitions, 4124 flow. Second operand 9 states and 103 transitions. [2024-11-19 01:47:57,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 259 transitions, 5123 flow [2024-11-19 01:47:57,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 259 transitions, 4931 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-11-19 01:47:57,335 INFO L231 Difference]: Finished difference. Result has 215 places, 220 transitions, 4217 flow [2024-11-19 01:47:57,335 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4217, PETRI_PLACES=215, PETRI_TRANSITIONS=220} [2024-11-19 01:47:57,335 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-11-19 01:47:57,335 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 220 transitions, 4217 flow [2024-11-19 01:47:57,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:57,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:57,336 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:57,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-11-19 01:47:57,336 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:57,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -15572783, now seen corresponding path program 15 times [2024-11-19 01:47:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643551436] [2024-11-19 01:47:57,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:57,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:57,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643551436] [2024-11-19 01:47:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643551436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:57,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:47:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201144084] [2024-11-19 01:47:57,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:57,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:47:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:47:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:47:57,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:57,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 220 transitions, 4217 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:57,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:57,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:57,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:58,034 INFO L124 PetriNetUnfolderBase]: 1721/2894 cut-off events. [2024-11-19 01:47:58,035 INFO L125 PetriNetUnfolderBase]: For 35622/35622 co-relation queries the response was YES. [2024-11-19 01:47:58,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 2894 events. 1721/2894 cut-off events. For 35622/35622 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16007 event pairs, 615 based on Foata normal form. 6/2900 useless extension candidates. Maximal degree in co-relation 20397. Up to 2068 conditions per place. [2024-11-19 01:47:58,058 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 154 selfloop transitions, 87 changer transitions 5/247 dead transitions. [2024-11-19 01:47:58,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 247 transitions, 4857 flow [2024-11-19 01:47:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:47:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:47:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-11-19 01:47:58,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2852941176470588 [2024-11-19 01:47:58,059 INFO L175 Difference]: Start difference. First operand has 215 places, 220 transitions, 4217 flow. Second operand 10 states and 97 transitions. [2024-11-19 01:47:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 247 transitions, 4857 flow [2024-11-19 01:47:58,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 247 transitions, 4704 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-11-19 01:47:58,233 INFO L231 Difference]: Finished difference. Result has 218 places, 216 transitions, 4140 flow [2024-11-19 01:47:58,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4140, PETRI_PLACES=218, PETRI_TRANSITIONS=216} [2024-11-19 01:47:58,233 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-11-19 01:47:58,233 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 216 transitions, 4140 flow [2024-11-19 01:47:58,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:58,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:58,234 INFO L204 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, 1, 1, 1] [2024-11-19 01:47:58,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-11-19 01:47:58,234 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:58,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1503466015, now seen corresponding path program 16 times [2024-11-19 01:47:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:58,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043488387] [2024-11-19 01:47:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:47:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:58,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:47:58,242 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:47:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043488387] [2024-11-19 01:47:58,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043488387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:47:58,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:47:58,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 01:47:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420268303] [2024-11-19 01:47:58,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:47:58,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:47:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:47:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:47:58,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-19 01:47:58,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 216 transitions, 4140 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:58,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:58,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-19 01:47:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand