./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.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 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:09:31,103 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:09:31,153 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:09:31,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:09:31,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:09:31,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:09:31,190 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:09:31,191 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:09:31,191 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:09:31,192 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:09:31,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:09:31,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:09:31,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:09:31,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:09:31,195 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:09:31,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:09:31,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:09:31,196 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:09:31,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:09:31,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:09:31,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:09:31,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:09:31,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:09:31,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:09:31,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:09:31,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:09:31,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:09:31,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e [2024-10-13 07:09:31,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:09:31,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:09:31,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:09:31,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:09:31,448 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:09:31,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2024-10-13 07:09:32,692 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:09:32,843 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:09:32,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2024-10-13 07:09:32,853 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/978cdf3a1/0e1f682810c94a0e87a29acf02236c40/FLAGde693b36e [2024-10-13 07:09:32,867 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/978cdf3a1/0e1f682810c94a0e87a29acf02236c40 [2024-10-13 07:09:32,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:09:32,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:09:32,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:09:32,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:09:32,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:09:32,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:32" (1/1) ... [2024-10-13 07:09:32,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a65af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:32, skipping insertion in model container [2024-10-13 07:09:32,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:32" (1/1) ... [2024-10-13 07:09:32,904 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:09:33,067 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2580,2593] [2024-10-13 07:09:33,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:09:33,100 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:09:33,117 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2580,2593] [2024-10-13 07:09:33,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:09:33,136 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:09:33,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33 WrapperNode [2024-10-13 07:09:33,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:09:33,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:09:33,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:09:33,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:09:33,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,176 INFO L138 Inliner]: procedures = 20, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-10-13 07:09:33,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:09:33,177 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:09:33,177 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:09:33,177 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:09:33,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,188 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,207 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-13 07:09:33,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:09:33,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:09:33,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:09:33,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:09:33,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (1/1) ... [2024-10-13 07:09:33,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:09:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:33,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:09:33,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:09:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:09:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:09:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:09:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:09:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:09:33,296 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:09:33,374 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:09:33,376 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:09:33,528 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:09:33,529 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:09:33,656 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:09:33,657 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 07:09:33,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:33 BoogieIcfgContainer [2024-10-13 07:09:33,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:09:33,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:09:33,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:09:33,662 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:09:33,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:09:32" (1/3) ... [2024-10-13 07:09:33,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4270b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:33, skipping insertion in model container [2024-10-13 07:09:33,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:33" (2/3) ... [2024-10-13 07:09:33,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4270b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:33, skipping insertion in model container [2024-10-13 07:09:33,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:33" (3/3) ... [2024-10-13 07:09:33,665 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2024-10-13 07:09:33,680 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:09:33,680 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:09:33,680 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:09:33,720 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:09:33,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-10-13 07:09:33,776 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-10-13 07:09:33,776 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:09:33,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 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. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-10-13 07:09:33,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-10-13 07:09:33,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-10-13 07:09:33,794 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:09:33,801 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;@792adc29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:09:33,803 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:09:33,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:09:33,814 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-13 07:09:33,814 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:09:33,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:33,815 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:33,815 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:33,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:33,819 INFO L85 PathProgramCache]: Analyzing trace with hash -314967004, now seen corresponding path program 1 times [2024-10-13 07:09:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:33,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862077947] [2024-10-13 07:09:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862077947] [2024-10-13 07:09:34,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862077947] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:34,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:34,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:09:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553829698] [2024-10-13 07:09:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:34,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:09:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:09:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:09:34,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:34,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-10-13 07:09:34,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:34,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:34,278 INFO L124 PetriNetUnfolderBase]: 130/252 cut-off events. [2024-10-13 07:09:34,278 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 07:09:34,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 252 events. 130/252 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 939 event pairs, 12 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 404. Up to 165 conditions per place. [2024-10-13 07:09:34,284 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 21 selfloop transitions, 5 changer transitions 1/36 dead transitions. [2024-10-13 07:09:34,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 147 flow [2024-10-13 07:09:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:09:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:09:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-13 07:09:34,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-10-13 07:09:34,300 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 3 states and 61 transitions. [2024-10-13 07:09:34,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 147 flow [2024-10-13 07:09:34,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 133 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:09:34,304 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 87 flow [2024-10-13 07:09:34,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-10-13 07:09:34,311 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-10-13 07:09:34,311 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 87 flow [2024-10-13 07:09:34,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-10-13 07:09:34,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:34,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:34,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:09:34,312 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:34,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash 112974820, now seen corresponding path program 1 times [2024-10-13 07:09:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937005724] [2024-10-13 07:09:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:34,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:34,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937005724] [2024-10-13 07:09:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937005724] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:34,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:09:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891043000] [2024-10-13 07:09:34,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:34,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:34,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:34,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:34,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:34,654 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2024-10-13 07:09:34,654 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-13 07:09:34,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 318 events. 173/318 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1320 event pairs, 16 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 342. Up to 129 conditions per place. [2024-10-13 07:09:34,660 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 35 selfloop transitions, 9 changer transitions 3/58 dead transitions. [2024-10-13 07:09:34,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 58 transitions, 254 flow [2024-10-13 07:09:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:09:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:09:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-13 07:09:34,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7214285714285714 [2024-10-13 07:09:34,664 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 87 flow. Second operand 5 states and 101 transitions. [2024-10-13 07:09:34,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 58 transitions, 254 flow [2024-10-13 07:09:34,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 58 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:09:34,666 INFO L231 Difference]: Finished difference. Result has 33 places, 36 transitions, 139 flow [2024-10-13 07:09:34,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=33, PETRI_TRANSITIONS=36} [2024-10-13 07:09:34,668 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-10-13 07:09:34,668 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 36 transitions, 139 flow [2024-10-13 07:09:34,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:34,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:34,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:34,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:09:34,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:34,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1594057982, now seen corresponding path program 2 times [2024-10-13 07:09:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:34,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471515558] [2024-10-13 07:09:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:34,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471515558] [2024-10-13 07:09:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471515558] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:34,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:09:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329999644] [2024-10-13 07:09:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:34,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:34,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:34,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:34,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:34,934 INFO L124 PetriNetUnfolderBase]: 160/325 cut-off events. [2024-10-13 07:09:34,934 INFO L125 PetriNetUnfolderBase]: For 202/206 co-relation queries the response was YES. [2024-10-13 07:09:34,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 325 events. 160/325 cut-off events. For 202/206 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1402 event pairs, 11 based on Foata normal form. 17/305 useless extension candidates. Maximal degree in co-relation 248. Up to 80 conditions per place. [2024-10-13 07:09:34,939 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 3/63 dead transitions. [2024-10-13 07:09:34,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 63 transitions, 343 flow [2024-10-13 07:09:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:09:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:09:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-13 07:09:34,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7214285714285714 [2024-10-13 07:09:34,941 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 139 flow. Second operand 5 states and 101 transitions. [2024-10-13 07:09:34,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 63 transitions, 343 flow [2024-10-13 07:09:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:34,947 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 225 flow [2024-10-13 07:09:34,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-10-13 07:09:34,948 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2024-10-13 07:09:34,949 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 225 flow [2024-10-13 07:09:34,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:34,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:34,949 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:34,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:09:34,950 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:34,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1183701864, now seen corresponding path program 1 times [2024-10-13 07:09:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:34,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516845236] [2024-10-13 07:09:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:35,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516845236] [2024-10-13 07:09:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516845236] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:09:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115860624] [2024-10-13 07:09:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:35,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:35,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:35,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:35,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:35,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:35,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:35,156 INFO L124 PetriNetUnfolderBase]: 159/314 cut-off events. [2024-10-13 07:09:35,157 INFO L125 PetriNetUnfolderBase]: For 587/609 co-relation queries the response was YES. [2024-10-13 07:09:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 314 events. 159/314 cut-off events. For 587/609 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1340 event pairs, 15 based on Foata normal form. 11/287 useless extension candidates. Maximal degree in co-relation 327. Up to 145 conditions per place. [2024-10-13 07:09:35,159 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 42 selfloop transitions, 8 changer transitions 4/65 dead transitions. [2024-10-13 07:09:35,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 65 transitions, 435 flow [2024-10-13 07:09:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:09:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:09:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-10-13 07:09:35,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7071428571428572 [2024-10-13 07:09:35,161 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 225 flow. Second operand 5 states and 99 transitions. [2024-10-13 07:09:35,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 65 transitions, 435 flow [2024-10-13 07:09:35,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 431 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:35,165 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 272 flow [2024-10-13 07:09:35,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-10-13 07:09:35,166 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-10-13 07:09:35,166 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 272 flow [2024-10-13 07:09:35,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:35,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:35,167 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:35,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:09:35,167 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:35,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 707370358, now seen corresponding path program 2 times [2024-10-13 07:09:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:35,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975623835] [2024-10-13 07:09:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:35,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:35,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975623835] [2024-10-13 07:09:35,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975623835] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:35,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:35,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:09:35,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141999063] [2024-10-13 07:09:35,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:35,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:35,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:35,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:35,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:35,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:35,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:35,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:35,350 INFO L124 PetriNetUnfolderBase]: 148/311 cut-off events. [2024-10-13 07:09:35,350 INFO L125 PetriNetUnfolderBase]: For 623/631 co-relation queries the response was YES. [2024-10-13 07:09:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 311 events. 148/311 cut-off events. For 623/631 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1244 event pairs, 11 based on Foata normal form. 16/292 useless extension candidates. Maximal degree in co-relation 722. Up to 80 conditions per place. [2024-10-13 07:09:35,353 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 40 selfloop transitions, 12 changer transitions 2/65 dead transitions. [2024-10-13 07:09:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 482 flow [2024-10-13 07:09:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:09:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:09:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-10-13 07:09:35,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-10-13 07:09:35,355 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 272 flow. Second operand 5 states and 96 transitions. [2024-10-13 07:09:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 482 flow [2024-10-13 07:09:35,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 466 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 07:09:35,360 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 335 flow [2024-10-13 07:09:35,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-10-13 07:09:35,361 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-10-13 07:09:35,361 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 335 flow [2024-10-13 07:09:35,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:35,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:35,361 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] [2024-10-13 07:09:35,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:09:35,362 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:35,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1306210578, now seen corresponding path program 1 times [2024-10-13 07:09:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766273732] [2024-10-13 07:09:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766273732] [2024-10-13 07:09:35,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766273732] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225475060] [2024-10-13 07:09:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:35,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:35,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:35,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:09:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:35,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:09:35,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:35,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225475060] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:36,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:36,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-10-13 07:09:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785294542] [2024-10-13 07:09:36,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:36,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:09:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:09:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:09:36,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-10-13 07:09:36,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 335 flow. Second operand has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:36,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:36,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-10-13 07:09:36,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:36,669 INFO L124 PetriNetUnfolderBase]: 411/775 cut-off events. [2024-10-13 07:09:36,669 INFO L125 PetriNetUnfolderBase]: For 2447/2447 co-relation queries the response was YES. [2024-10-13 07:09:36,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 775 events. 411/775 cut-off events. For 2447/2447 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3349 event pairs, 4 based on Foata normal form. 42/754 useless extension candidates. Maximal degree in co-relation 1287. Up to 229 conditions per place. [2024-10-13 07:09:36,676 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 105 selfloop transitions, 49 changer transitions 0/161 dead transitions. [2024-10-13 07:09:36,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 161 transitions, 1332 flow [2024-10-13 07:09:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:09:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:09:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 306 transitions. [2024-10-13 07:09:36,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-10-13 07:09:36,680 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 335 flow. Second operand 18 states and 306 transitions. [2024-10-13 07:09:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 161 transitions, 1332 flow [2024-10-13 07:09:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 161 transitions, 1299 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-10-13 07:09:36,690 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 820 flow [2024-10-13 07:09:36,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=820, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-10-13 07:09:36,692 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-10-13 07:09:36,693 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 820 flow [2024-10-13 07:09:36,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:36,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:36,693 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:36,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:36,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:09:36,898 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:36,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1164099254, now seen corresponding path program 2 times [2024-10-13 07:09:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079549425] [2024-10-13 07:09:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:09:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079549425] [2024-10-13 07:09:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079549425] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:09:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917292568] [2024-10-13 07:09:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:37,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:37,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:37,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 820 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:37,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:37,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:37,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:37,236 INFO L124 PetriNetUnfolderBase]: 712/1431 cut-off events. [2024-10-13 07:09:37,236 INFO L125 PetriNetUnfolderBase]: For 8150/8171 co-relation queries the response was YES. [2024-10-13 07:09:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6132 conditions, 1431 events. 712/1431 cut-off events. For 8150/8171 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8265 event pairs, 157 based on Foata normal form. 2/1297 useless extension candidates. Maximal degree in co-relation 5425. Up to 431 conditions per place. [2024-10-13 07:09:37,250 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 99 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2024-10-13 07:09:37,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 158 transitions, 1967 flow [2024-10-13 07:09:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:09:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:09:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-10-13 07:09:37,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-13 07:09:37,252 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 820 flow. Second operand 4 states and 84 transitions. [2024-10-13 07:09:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 158 transitions, 1967 flow [2024-10-13 07:09:37,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 158 transitions, 1854 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-10-13 07:09:37,273 INFO L231 Difference]: Finished difference. Result has 82 places, 109 transitions, 1284 flow [2024-10-13 07:09:37,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1284, PETRI_PLACES=82, PETRI_TRANSITIONS=109} [2024-10-13 07:09:37,274 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-10-13 07:09:37,274 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 109 transitions, 1284 flow [2024-10-13 07:09:37,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:37,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:37,275 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:37,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 07:09:37,275 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:37,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 17516002, now seen corresponding path program 1 times [2024-10-13 07:09:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:37,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925114194] [2024-10-13 07:09:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:37,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:09:37,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925114194] [2024-10-13 07:09:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925114194] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:37,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:37,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:09:37,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443882327] [2024-10-13 07:09:37,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:37,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:37,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:37,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 109 transitions, 1284 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:37,628 INFO L124 PetriNetUnfolderBase]: 948/2080 cut-off events. [2024-10-13 07:09:37,628 INFO L125 PetriNetUnfolderBase]: For 18135/18403 co-relation queries the response was YES. [2024-10-13 07:09:37,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10328 conditions, 2080 events. 948/2080 cut-off events. For 18135/18403 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14363 event pairs, 178 based on Foata normal form. 48/1972 useless extension candidates. Maximal degree in co-relation 9422. Up to 650 conditions per place. [2024-10-13 07:09:37,649 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 138 selfloop transitions, 26 changer transitions 0/194 dead transitions. [2024-10-13 07:09:37,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 194 transitions, 2739 flow [2024-10-13 07:09:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:09:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:09:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-10-13 07:09:37,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7053571428571429 [2024-10-13 07:09:37,653 INFO L175 Difference]: Start difference. First operand has 82 places, 109 transitions, 1284 flow. Second operand 4 states and 79 transitions. [2024-10-13 07:09:37,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 194 transitions, 2739 flow [2024-10-13 07:09:37,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 194 transitions, 2726 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:09:37,693 INFO L231 Difference]: Finished difference. Result has 87 places, 123 transitions, 1530 flow [2024-10-13 07:09:37,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1530, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2024-10-13 07:09:37,697 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-10-13 07:09:37,697 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 1530 flow [2024-10-13 07:09:37,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:37,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:37,697 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:37,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 07:09:37,698 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:37,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1978489132, now seen corresponding path program 1 times [2024-10-13 07:09:37,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:37,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46297995] [2024-10-13 07:09:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:09:37,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:37,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46297995] [2024-10-13 07:09:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46297995] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:09:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395427788] [2024-10-13 07:09:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:37,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:09:37,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:09:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:09:37,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:37,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 1530 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:37,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:37,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:37,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:38,065 INFO L124 PetriNetUnfolderBase]: 817/1793 cut-off events. [2024-10-13 07:09:38,066 INFO L125 PetriNetUnfolderBase]: For 15247/15291 co-relation queries the response was YES. [2024-10-13 07:09:38,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8953 conditions, 1793 events. 817/1793 cut-off events. For 15247/15291 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11969 event pairs, 180 based on Foata normal form. 46/1781 useless extension candidates. Maximal degree in co-relation 8241. Up to 516 conditions per place. [2024-10-13 07:09:38,082 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 100 selfloop transitions, 30 changer transitions 0/161 dead transitions. [2024-10-13 07:09:38,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 2202 flow [2024-10-13 07:09:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:09:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:09:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-10-13 07:09:38,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-10-13 07:09:38,084 INFO L175 Difference]: Start difference. First operand has 87 places, 123 transitions, 1530 flow. Second operand 4 states and 80 transitions. [2024-10-13 07:09:38,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 2202 flow [2024-10-13 07:09:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 161 transitions, 2202 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:38,109 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 1456 flow [2024-10-13 07:09:38,110 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1456, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2024-10-13 07:09:38,111 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-10-13 07:09:38,111 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 1456 flow [2024-10-13 07:09:38,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:38,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:38,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:38,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:09:38,114 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:38,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -612012798, now seen corresponding path program 1 times [2024-10-13 07:09:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230998382] [2024-10-13 07:09:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:38,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:38,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230998382] [2024-10-13 07:09:38,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230998382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:38,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869389243] [2024-10-13 07:09:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:38,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:38,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:09:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:38,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:09:38,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:38,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869389243] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:38,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:38,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-10-13 07:09:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331536951] [2024-10-13 07:09:38,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:38,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:09:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:09:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:09:38,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:38,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 1456 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:38,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:38,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:38,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:38,915 INFO L124 PetriNetUnfolderBase]: 1135/2474 cut-off events. [2024-10-13 07:09:38,915 INFO L125 PetriNetUnfolderBase]: For 21575/21679 co-relation queries the response was YES. [2024-10-13 07:09:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12951 conditions, 2474 events. 1135/2474 cut-off events. For 21575/21679 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17134 event pairs, 214 based on Foata normal form. 10/2417 useless extension candidates. Maximal degree in co-relation 11253. Up to 1289 conditions per place. [2024-10-13 07:09:38,938 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 162 selfloop transitions, 15 changer transitions 1/209 dead transitions. [2024-10-13 07:09:38,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 209 transitions, 3061 flow [2024-10-13 07:09:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:09:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:09:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-10-13 07:09:38,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7785714285714286 [2024-10-13 07:09:38,940 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 1456 flow. Second operand 5 states and 109 transitions. [2024-10-13 07:09:38,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 209 transitions, 3061 flow [2024-10-13 07:09:38,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 209 transitions, 3061 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:38,980 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1547 flow [2024-10-13 07:09:38,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1547, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-10-13 07:09:38,981 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2024-10-13 07:09:38,981 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1547 flow [2024-10-13 07:09:38,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:38,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:38,982 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:38,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:09:39,182 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,SelfDestructingSolverStorable9 [2024-10-13 07:09:39,186 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:39,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1688387524, now seen corresponding path program 2 times [2024-10-13 07:09:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941125978] [2024-10-13 07:09:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941125978] [2024-10-13 07:09:39,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941125978] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:39,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052269673] [2024-10-13 07:09:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:09:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:39,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:39,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:09:39,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:09:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:39,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:09:39,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:39,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052269673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:39,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:39,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-10-13 07:09:39,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870788426] [2024-10-13 07:09:39,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:39,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:09:39,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:09:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:09:39,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:39,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1547 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:39,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:39,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:39,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:40,198 INFO L124 PetriNetUnfolderBase]: 1990/4349 cut-off events. [2024-10-13 07:09:40,198 INFO L125 PetriNetUnfolderBase]: For 42246/42487 co-relation queries the response was YES. [2024-10-13 07:09:40,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24284 conditions, 4349 events. 1990/4349 cut-off events. For 42246/42487 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 33385 event pairs, 285 based on Foata normal form. 46/4305 useless extension candidates. Maximal degree in co-relation 20984. Up to 1149 conditions per place. [2024-10-13 07:09:40,236 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 260 selfloop transitions, 29 changer transitions 1/321 dead transitions. [2024-10-13 07:09:40,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 321 transitions, 4988 flow [2024-10-13 07:09:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:09:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:09:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-10-13 07:09:40,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7916666666666666 [2024-10-13 07:09:40,238 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1547 flow. Second operand 6 states and 133 transitions. [2024-10-13 07:09:40,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 321 transitions, 4988 flow [2024-10-13 07:09:40,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 321 transitions, 4940 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:40,310 INFO L231 Difference]: Finished difference. Result has 103 places, 136 transitions, 1669 flow [2024-10-13 07:09:40,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1669, PETRI_PLACES=103, PETRI_TRANSITIONS=136} [2024-10-13 07:09:40,311 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2024-10-13 07:09:40,311 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 136 transitions, 1669 flow [2024-10-13 07:09:40,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:40,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:40,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:40,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:09:40,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:40,516 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:40,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash -175691206, now seen corresponding path program 3 times [2024-10-13 07:09:40,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:40,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021902278] [2024-10-13 07:09:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:40,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:40,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021902278] [2024-10-13 07:09:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021902278] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:40,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950888056] [2024-10-13 07:09:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:09:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:40,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:40,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:09:40,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:09:40,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:40,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:09:40,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:40,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950888056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:40,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-10-13 07:09:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756100865] [2024-10-13 07:09:40,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:40,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:09:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:09:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:09:40,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:40,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 1669 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:40,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:40,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:40,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:41,585 INFO L124 PetriNetUnfolderBase]: 2526/5576 cut-off events. [2024-10-13 07:09:41,585 INFO L125 PetriNetUnfolderBase]: For 54753/55042 co-relation queries the response was YES. [2024-10-13 07:09:41,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31464 conditions, 5576 events. 2526/5576 cut-off events. For 54753/55042 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 45562 event pairs, 349 based on Foata normal form. 43/5532 useless extension candidates. Maximal degree in co-relation 26755. Up to 2976 conditions per place. [2024-10-13 07:09:41,682 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 253 selfloop transitions, 23 changer transitions 1/308 dead transitions. [2024-10-13 07:09:41,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 308 transitions, 4616 flow [2024-10-13 07:09:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:09:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:09:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-10-13 07:09:41,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2024-10-13 07:09:41,684 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 1669 flow. Second operand 6 states and 131 transitions. [2024-10-13 07:09:41,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 308 transitions, 4616 flow [2024-10-13 07:09:41,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 308 transitions, 4554 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-10-13 07:09:41,768 INFO L231 Difference]: Finished difference. Result has 109 places, 152 transitions, 1809 flow [2024-10-13 07:09:41,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1809, PETRI_PLACES=109, PETRI_TRANSITIONS=152} [2024-10-13 07:09:41,769 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2024-10-13 07:09:41,769 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 152 transitions, 1809 flow [2024-10-13 07:09:41,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:41,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:41,769 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:41,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:09:41,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:41,970 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:41,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:41,970 INFO L85 PathProgramCache]: Analyzing trace with hash -515388196, now seen corresponding path program 4 times [2024-10-13 07:09:41,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:41,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430371919] [2024-10-13 07:09:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:41,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430371919] [2024-10-13 07:09:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430371919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089198038] [2024-10-13 07:09:42,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:09:42,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:42,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:42,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:42,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:09:42,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:09:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:42,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:09:42,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:42,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:42,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089198038] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:42,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:42,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-10-13 07:09:42,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266816005] [2024-10-13 07:09:42,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:42,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:09:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:42,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:09:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:09:42,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:42,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 152 transitions, 1809 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:42,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:42,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:42,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:43,270 INFO L124 PetriNetUnfolderBase]: 3027/6641 cut-off events. [2024-10-13 07:09:43,270 INFO L125 PetriNetUnfolderBase]: For 65929/66259 co-relation queries the response was YES. [2024-10-13 07:09:43,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37650 conditions, 6641 events. 3027/6641 cut-off events. For 65929/66259 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 55770 event pairs, 428 based on Foata normal form. 91/6638 useless extension candidates. Maximal degree in co-relation 32399. Up to 3382 conditions per place. [2024-10-13 07:09:43,381 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 267 selfloop transitions, 30 changer transitions 1/329 dead transitions. [2024-10-13 07:09:43,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 329 transitions, 4815 flow [2024-10-13 07:09:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:09:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:09:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-10-13 07:09:43,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2024-10-13 07:09:43,383 INFO L175 Difference]: Start difference. First operand has 109 places, 152 transitions, 1809 flow. Second operand 6 states and 131 transitions. [2024-10-13 07:09:43,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 329 transitions, 4815 flow [2024-10-13 07:09:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 329 transitions, 4805 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:43,498 INFO L231 Difference]: Finished difference. Result has 117 places, 173 transitions, 2078 flow [2024-10-13 07:09:43,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2078, PETRI_PLACES=117, PETRI_TRANSITIONS=173} [2024-10-13 07:09:43,499 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 89 predicate places. [2024-10-13 07:09:43,499 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 173 transitions, 2078 flow [2024-10-13 07:09:43,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:43,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:43,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:43,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:09:43,699 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,SelfDestructingSolverStorable12 [2024-10-13 07:09:43,700 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:43,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1523378012, now seen corresponding path program 5 times [2024-10-13 07:09:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743727267] [2024-10-13 07:09:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:43,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:43,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743727267] [2024-10-13 07:09:43,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743727267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:43,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377186253] [2024-10-13 07:09:43,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:09:43,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:43,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:43,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:09:43,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:09:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:43,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:09:43,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:43,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:09:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377186253] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:43,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-10-13 07:09:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149542716] [2024-10-13 07:09:43,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:43,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:09:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:09:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:09:43,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:43,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 173 transitions, 2078 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:43,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:43,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:43,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:44,949 INFO L124 PetriNetUnfolderBase]: 3534/7693 cut-off events. [2024-10-13 07:09:44,949 INFO L125 PetriNetUnfolderBase]: For 80535/81061 co-relation queries the response was YES. [2024-10-13 07:09:44,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44911 conditions, 7693 events. 3534/7693 cut-off events. For 80535/81061 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 66147 event pairs, 429 based on Foata normal form. 136/7709 useless extension candidates. Maximal degree in co-relation 39026. Up to 3254 conditions per place. [2024-10-13 07:09:45,019 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 302 selfloop transitions, 45 changer transitions 1/379 dead transitions. [2024-10-13 07:09:45,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 379 transitions, 5727 flow [2024-10-13 07:09:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:09:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:09:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-10-13 07:09:45,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7916666666666666 [2024-10-13 07:09:45,022 INFO L175 Difference]: Start difference. First operand has 117 places, 173 transitions, 2078 flow. Second operand 6 states and 133 transitions. [2024-10-13 07:09:45,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 379 transitions, 5727 flow [2024-10-13 07:09:45,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 379 transitions, 5711 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-10-13 07:09:45,189 INFO L231 Difference]: Finished difference. Result has 126 places, 194 transitions, 2427 flow [2024-10-13 07:09:45,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2427, PETRI_PLACES=126, PETRI_TRANSITIONS=194} [2024-10-13 07:09:45,190 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-10-13 07:09:45,190 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 194 transitions, 2427 flow [2024-10-13 07:09:45,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:45,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:45,190 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:45,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:09:45,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:45,391 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:09:45,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1077834746, now seen corresponding path program 6 times [2024-10-13 07:09:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150019430] [2024-10-13 07:09:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:45,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:45,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150019430] [2024-10-13 07:09:45,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150019430] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:09:45,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498134347] [2024-10-13 07:09:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:09:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:09:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:45,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:09:45,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:09:45,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:09:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:09:45,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 07:09:45,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:09:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:46,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:09:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:09:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498134347] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:09:56,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:09:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-10-13 07:09:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410922248] [2024-10-13 07:09:56,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:09:56,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:09:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:09:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=461, Unknown=2, NotChecked=0, Total=552 [2024-10-13 07:09:56,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-10-13 07:09:56,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 194 transitions, 2427 flow. Second operand has 24 states, 24 states have (on average 13.375) internal successors, (321), 24 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:09:56,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:56,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-10-13 07:09:56,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:09:58,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:10:34,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:10:38,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:11:05,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:11:06,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:11:10,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []