/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:46:13,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:46:13,503 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:46:13,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:46:13,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:46:13,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:46:13,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:46:13,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:46:13,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:46:13,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:46:13,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:46:13,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:46:13,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:46:13,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:46:13,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:46:13,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:46:13,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:46:13,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:46:13,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:46:13,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:46:13,551 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:46:13,551 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:46:13,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:46:13,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:46:13,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:46:13,553 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:46:13,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:46:13,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:46:13,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:46:13,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:46:13,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:46:13,554 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:46:13,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:46:13,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:46:13,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:46:13,555 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:46:13,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:46:13,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:46:13,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:46:13,906 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:46:13,906 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:46:13,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-26 12:46:15,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:46:15,472 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:46:15,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-26 12:46:15,488 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a481497d9/a787d7a7f73b42d486b4f5882be0ac18/FLAG9471b5933 [2023-08-26 12:46:15,501 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a481497d9/a787d7a7f73b42d486b4f5882be0ac18 [2023-08-26 12:46:15,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:46:15,504 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:46:15,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:46:15,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:46:15,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:46:15,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:46:15" (1/1) ... [2023-08-26 12:46:15,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ecd51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:15, skipping insertion in model container [2023-08-26 12:46:15,509 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:46:15" (1/1) ... [2023-08-26 12:46:15,550 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:46:15,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:46:16,008 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:46:16,032 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 12:46:16,033 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 12:46:16,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:46:16,135 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:46:16,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16 WrapperNode [2023-08-26 12:46:16,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:46:16,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:46:16,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:46:16,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:46:16,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,195 INFO L138 Inliner]: procedures = 278, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 213 [2023-08-26 12:46:16,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:46:16,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:46:16,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:46:16,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:46:16,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:46:16,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:46:16,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:46:16,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:46:16,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (1/1) ... [2023-08-26 12:46:16,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:46:16,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:46:16,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:46:16,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:46:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:46:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 12:46:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 12:46:16,287 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 12:46:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:46:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:46:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 12:46:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 12:46:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:46:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:46:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 12:46:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:46:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 12:46:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:46:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:46:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:46:16,290 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:46:16,429 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:46:16,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:46:16,897 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:46:16,907 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:46:16,908 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-26 12:46:16,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:46:16 BoogieIcfgContainer [2023-08-26 12:46:16,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:46:16,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:46:16,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:46:16,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:46:16,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:46:15" (1/3) ... [2023-08-26 12:46:16,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57694058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:46:16, skipping insertion in model container [2023-08-26 12:46:16,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:46:16" (2/3) ... [2023-08-26 12:46:16,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57694058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:46:16, skipping insertion in model container [2023-08-26 12:46:16,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:46:16" (3/3) ... [2023-08-26 12:46:16,918 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-08-26 12:46:16,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:46:16,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-08-26 12:46:16,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:46:17,048 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:46:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,262 INFO L124 PetriNetUnfolderBase]: 54/490 cut-off events. [2023-08-26 12:46:17,263 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-26 12:46:17,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 490 events. 54/490 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2291 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 248. Up to 8 conditions per place. [2023-08-26 12:46:17,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:46:17,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 253 transitions, 528 flow [2023-08-26 12:46:17,399 INFO L124 PetriNetUnfolderBase]: 54/490 cut-off events. [2023-08-26 12:46:17,399 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-26 12:46:17,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 490 events. 54/490 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2291 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 248. Up to 8 conditions per place. [2023-08-26 12:46:17,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 21042 [2023-08-26 12:46:25,903 INFO L134 LiptonReduction]: Checked pairs total: 60550 [2023-08-26 12:46:25,904 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-08-26 12:46:25,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:46:25,921 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2076d13e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:46:25,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-08-26 12:46:25,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:46:25,923 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:46:25,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:46:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:25,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:46:25,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:25,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 995, now seen corresponding path program 1 times [2023-08-26 12:46:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401228635] [2023-08-26 12:46:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:26,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:26,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401228635] [2023-08-26 12:46:26,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401228635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:26,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:26,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:46:26,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618759924] [2023-08-26 12:46:26,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:26,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:46:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:46:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:46:26,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 478 [2023-08-26 12:46:26,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:26,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 478 [2023-08-26 12:46:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:27,647 INFO L124 PetriNetUnfolderBase]: 9123/17000 cut-off events. [2023-08-26 12:46:27,647 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-26 12:46:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31091 conditions, 17000 events. 9123/17000 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 138563 event pairs, 8595 based on Foata normal form. 454/9825 useless extension candidates. Maximal degree in co-relation 29260. Up to 13978 conditions per place. [2023-08-26 12:46:27,779 INFO L140 encePairwiseOnDemand]: 463/478 looper letters, 62 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2023-08-26 12:46:27,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 316 flow [2023-08-26 12:46:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:46:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:46:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 535 transitions. [2023-08-26 12:46:27,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596234309623431 [2023-08-26 12:46:27,799 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 535 transitions. [2023-08-26 12:46:27,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 535 transitions. [2023-08-26 12:46:27,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:27,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 535 transitions. [2023-08-26 12:46:27,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.5) internal successors, (535), 2 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:27,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:27,820 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 222 flow. Second operand 2 states and 535 transitions. [2023-08-26 12:46:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 316 flow [2023-08-26 12:46:27,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:46:27,832 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 192 flow [2023-08-26 12:46:27,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2023-08-26 12:46:27,837 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2023-08-26 12:46:27,838 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 192 flow [2023-08-26 12:46:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:27,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:27,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:46:27,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:46:27,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:27,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 31890, now seen corresponding path program 1 times [2023-08-26 12:46:27,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:27,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046064123] [2023-08-26 12:46:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:27,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046064123] [2023-08-26 12:46:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046064123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:28,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:28,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:46:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915228232] [2023-08-26 12:46:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:28,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:46:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:46:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:46:28,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 478 [2023-08-26 12:46:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:28,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:28,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 478 [2023-08-26 12:46:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:29,990 INFO L124 PetriNetUnfolderBase]: 13898/23287 cut-off events. [2023-08-26 12:46:29,990 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-08-26 12:46:30,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44642 conditions, 23287 events. 13898/23287 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 172053 event pairs, 13284 based on Foata normal form. 0/12421 useless extension candidates. Maximal degree in co-relation 44637. Up to 21209 conditions per place. [2023-08-26 12:46:30,140 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 72 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-26 12:46:30,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 350 flow [2023-08-26 12:46:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:46:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:46:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-26 12:46:30,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177126917712692 [2023-08-26 12:46:30,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-26 12:46:30,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-26 12:46:30,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:30,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-26 12:46:30,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:30,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:30,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:30,149 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 192 flow. Second operand 3 states and 599 transitions. [2023-08-26 12:46:30,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 350 flow [2023-08-26 12:46:30,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:46:30,156 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 213 flow [2023-08-26 12:46:30,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2023-08-26 12:46:30,157 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 0 predicate places. [2023-08-26 12:46:30,157 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 213 flow [2023-08-26 12:46:30,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:30,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:30,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:46:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:46:30,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:30,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash 31889, now seen corresponding path program 1 times [2023-08-26 12:46:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:30,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652861491] [2023-08-26 12:46:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652861491] [2023-08-26 12:46:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652861491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:30,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:30,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:46:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769581154] [2023-08-26 12:46:30,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:46:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:46:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:46:30,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 478 [2023-08-26 12:46:30,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:30,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:30,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 478 [2023-08-26 12:46:30,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:31,958 INFO L124 PetriNetUnfolderBase]: 12894/21427 cut-off events. [2023-08-26 12:46:31,959 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-26 12:46:32,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41769 conditions, 21427 events. 12894/21427 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 155905 event pairs, 10196 based on Foata normal form. 0/11545 useless extension candidates. Maximal degree in co-relation 41762. Up to 16864 conditions per place. [2023-08-26 12:46:32,178 INFO L140 encePairwiseOnDemand]: 474/478 looper letters, 112 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-08-26 12:46:32,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 525 flow [2023-08-26 12:46:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:46:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:46:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-26 12:46:32,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45188284518828453 [2023-08-26 12:46:32,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-26 12:46:32,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-26 12:46:32,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:32,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-26 12:46:32,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:32,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:32,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:32,187 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 213 flow. Second operand 3 states and 648 transitions. [2023-08-26 12:46:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 525 flow [2023-08-26 12:46:32,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:46:32,192 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 210 flow [2023-08-26 12:46:32,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2023-08-26 12:46:32,193 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2023-08-26 12:46:32,193 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 210 flow [2023-08-26 12:46:32,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:32,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:32,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:46:32,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:46:32,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:32,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 950716094, now seen corresponding path program 1 times [2023-08-26 12:46:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:32,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943892586] [2023-08-26 12:46:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:32,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:32,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943892586] [2023-08-26 12:46:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943892586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:32,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:46:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419523777] [2023-08-26 12:46:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:46:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:46:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:46:32,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 478 [2023-08-26 12:46:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:32,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 478 [2023-08-26 12:46:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:33,752 INFO L124 PetriNetUnfolderBase]: 13424/22713 cut-off events. [2023-08-26 12:46:33,752 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2023-08-26 12:46:33,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44526 conditions, 22713 events. 13424/22713 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 171385 event pairs, 10104 based on Foata normal form. 0/13281 useless extension candidates. Maximal degree in co-relation 44519. Up to 16946 conditions per place. [2023-08-26 12:46:33,887 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 128 selfloop transitions, 5 changer transitions 0/147 dead transitions. [2023-08-26 12:46:33,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 147 transitions, 615 flow [2023-08-26 12:46:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:46:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:46:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-26 12:46:33,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46931659693165967 [2023-08-26 12:46:33,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-26 12:46:33,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-26 12:46:33,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:33,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-26 12:46:33,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:33,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:33,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:33,896 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 210 flow. Second operand 3 states and 673 transitions. [2023-08-26 12:46:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 147 transitions, 615 flow [2023-08-26 12:46:33,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 609 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:46:33,907 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 240 flow [2023-08-26 12:46:33,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2023-08-26 12:46:33,909 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2023-08-26 12:46:33,909 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 240 flow [2023-08-26 12:46:33,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:33,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:33,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:46:33,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:46:33,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:33,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 950716095, now seen corresponding path program 1 times [2023-08-26 12:46:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:33,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085260608] [2023-08-26 12:46:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:34,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:34,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085260608] [2023-08-26 12:46:34,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085260608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:34,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:34,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:46:34,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671414356] [2023-08-26 12:46:34,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:34,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:46:34,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:46:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:46:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 478 [2023-08-26 12:46:34,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:34,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:34,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 478 [2023-08-26 12:46:34,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:36,726 INFO L124 PetriNetUnfolderBase]: 24834/41557 cut-off events. [2023-08-26 12:46:36,726 INFO L125 PetriNetUnfolderBase]: For 8216/8216 co-relation queries the response was YES. [2023-08-26 12:46:36,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87018 conditions, 41557 events. 24834/41557 cut-off events. For 8216/8216 co-relation queries the response was YES. Maximal size of possible extension queue 1416. Compared 348409 event pairs, 7540 based on Foata normal form. 453/24973 useless extension candidates. Maximal degree in co-relation 87010. Up to 19971 conditions per place. [2023-08-26 12:46:36,959 INFO L140 encePairwiseOnDemand]: 475/478 looper letters, 137 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2023-08-26 12:46:36,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 154 transitions, 689 flow [2023-08-26 12:46:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:46:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:46:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-26 12:46:37,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769874476987448 [2023-08-26 12:46:37,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-26 12:46:37,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-26 12:46:37,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:37,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-26 12:46:37,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:37,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:37,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:37,164 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 240 flow. Second operand 3 states and 684 transitions. [2023-08-26 12:46:37,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 154 transitions, 689 flow [2023-08-26 12:46:37,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 154 transitions, 673 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:46:37,201 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 247 flow [2023-08-26 12:46:37,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-08-26 12:46:37,204 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 2 predicate places. [2023-08-26 12:46:37,204 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 247 flow [2023-08-26 12:46:37,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:37,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:37,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:46:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:46:37,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:37,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 950716423, now seen corresponding path program 1 times [2023-08-26 12:46:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:37,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998502047] [2023-08-26 12:46:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:37,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998502047] [2023-08-26 12:46:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998502047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:46:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242505349] [2023-08-26 12:46:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:37,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:46:37,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:46:37,328 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) [2023-08-26 12:46:37,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:46:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:37,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:46:37,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:46:37,518 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 12:46:37,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-26 12:46:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:37,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:46:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:37,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242505349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:46:37,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:46:37,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:46:37,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411790441] [2023-08-26 12:46:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:46:37,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:46:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:46:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:46:37,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 478 [2023-08-26 12:46:37,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:37,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:37,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 478 [2023-08-26 12:46:37,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:39,307 INFO L124 PetriNetUnfolderBase]: 12507/21299 cut-off events. [2023-08-26 12:46:39,308 INFO L125 PetriNetUnfolderBase]: For 2195/2195 co-relation queries the response was YES. [2023-08-26 12:46:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42950 conditions, 21299 events. 12507/21299 cut-off events. For 2195/2195 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 160658 event pairs, 6504 based on Foata normal form. 16/12750 useless extension candidates. Maximal degree in co-relation 42941. Up to 19218 conditions per place. [2023-08-26 12:46:39,388 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 94 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2023-08-26 12:46:39,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 493 flow [2023-08-26 12:46:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:46:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:46:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1145 transitions. [2023-08-26 12:46:39,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992329149232915 [2023-08-26 12:46:39,392 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1145 transitions. [2023-08-26 12:46:39,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1145 transitions. [2023-08-26 12:46:39,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:39,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1145 transitions. [2023-08-26 12:46:39,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:39,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:39,401 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:39,401 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 247 flow. Second operand 6 states and 1145 transitions. [2023-08-26 12:46:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 493 flow [2023-08-26 12:46:39,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:46:39,406 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 242 flow [2023-08-26 12:46:39,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-08-26 12:46:39,406 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-26 12:46:39,407 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 242 flow [2023-08-26 12:46:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:39,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:39,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:46:39,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 12:46:39,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-26 12:46:39,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:39,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash -592571474, now seen corresponding path program 1 times [2023-08-26 12:46:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:39,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204221425] [2023-08-26 12:46:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:39,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204221425] [2023-08-26 12:46:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204221425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:39,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:39,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:46:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874263561] [2023-08-26 12:46:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:46:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:46:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:46:39,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 478 [2023-08-26 12:46:39,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:39,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:39,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 478 [2023-08-26 12:46:39,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:41,042 INFO L124 PetriNetUnfolderBase]: 13246/21867 cut-off events. [2023-08-26 12:46:41,043 INFO L125 PetriNetUnfolderBase]: For 2571/2571 co-relation queries the response was YES. [2023-08-26 12:46:41,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45446 conditions, 21867 events. 13246/21867 cut-off events. For 2571/2571 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 169557 event pairs, 1957 based on Foata normal form. 0/12708 useless extension candidates. Maximal degree in co-relation 45437. Up to 15892 conditions per place. [2023-08-26 12:46:41,149 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 127 selfloop transitions, 6 changer transitions 0/146 dead transitions. [2023-08-26 12:46:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 651 flow [2023-08-26 12:46:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:46:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:46:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-08-26 12:46:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630404463040446 [2023-08-26 12:46:41,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-08-26 12:46:41,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-08-26 12:46:41,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:46:41,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-08-26 12:46:41,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:41,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:41,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:41,156 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 242 flow. Second operand 3 states and 664 transitions. [2023-08-26 12:46:41,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 651 flow [2023-08-26 12:46:41,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 146 transitions, 628 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 12:46:41,162 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 267 flow [2023-08-26 12:46:41,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2023-08-26 12:46:41,163 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-26 12:46:41,163 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 267 flow [2023-08-26 12:46:41,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:41,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:41,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:46:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:46:41,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-26 12:46:41,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash -592561282, now seen corresponding path program 1 times [2023-08-26 12:46:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:41,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70689113] [2023-08-26 12:46:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:46:41,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:46:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:46:41,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:46:41,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:46:41,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (63 of 64 remaining) [2023-08-26 12:46:41,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 64 remaining) [2023-08-26 12:46:41,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 64 remaining) [2023-08-26 12:46:41,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONASSERT (48 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 64 remaining) [2023-08-26 12:46:41,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 64 remaining) [2023-08-26 12:46:41,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 64 remaining) [2023-08-26 12:46:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONASSERT (10 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 64 remaining) [2023-08-26 12:46:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 64 remaining) [2023-08-26 12:46:41,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 64 remaining) [2023-08-26 12:46:41,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:46:41,213 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:46:41,215 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:46:41,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:46:41,273 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 12:46:41,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,512 INFO L124 PetriNetUnfolderBase]: 197/1443 cut-off events. [2023-08-26 12:46:41,512 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2023-08-26 12:46:41,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 1443 events. 197/1443 cut-off events. For 72/90 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9828 event pairs, 2 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 903. Up to 32 conditions per place. [2023-08-26 12:46:41,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:46:41,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 395 transitions, 838 flow [2023-08-26 12:46:41,767 INFO L124 PetriNetUnfolderBase]: 197/1443 cut-off events. [2023-08-26 12:46:41,768 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2023-08-26 12:46:41,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 1443 events. 197/1443 cut-off events. For 72/90 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9828 event pairs, 2 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 903. Up to 32 conditions per place. [2023-08-26 12:46:41,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 81656 [2023-08-26 12:46:52,237 INFO L134 LiptonReduction]: Checked pairs total: 247698 [2023-08-26 12:46:52,238 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-26 12:46:52,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:46:52,240 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2076d13e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:46:52,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-08-26 12:46:52,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:46:52,240 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:46:52,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:46:52,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:46:52,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:46:52,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-08-26 12:46:52,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:46:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1864, now seen corresponding path program 1 times [2023-08-26 12:46:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:46:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252781874] [2023-08-26 12:46:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:46:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:46:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:46:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:46:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:46:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252781874] [2023-08-26 12:46:52,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252781874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:46:52,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:46:52,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:46:52,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429580313] [2023-08-26 12:46:52,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:46:52,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:46:52,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:46:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:46:52,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:46:52,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 726 [2023-08-26 12:46:52,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 392 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:46:52,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:46:52,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 726 [2023-08-26 12:46:52,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand