/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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/weaver/parallel-barrier-loop.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:47:53,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:47:53,400 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 19:47:53,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:47:53,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:47:53,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:47:53,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:47:53,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:47:53,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:47:53,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:47:53,422 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:47:53,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:47:53,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:47:53,423 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:47:53,423 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:47:53,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:47:53,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:47:53,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:47:53,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:47:53,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:47:53,425 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:47:53,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:47:53,425 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:47:53,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:47:53,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:47:53,426 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:47:53,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:47:53,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:47:53,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:47:53,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:47:53,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:47:53,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:47:53,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:47:53,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:47:53,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:47:53,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:47:53,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:47:53,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:47:53,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:47:53,687 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:47:53,687 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:47:53,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-26 19:47:54,648 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:47:54,829 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:47:54,829 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-26 19:47:54,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e9a563d/e9135d5e151b44f7a91cb1e706273f0e/FLAG19a914a7f [2023-08-26 19:47:54,844 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e9a563d/e9135d5e151b44f7a91cb1e706273f0e [2023-08-26 19:47:54,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:47:54,846 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:47:54,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:47:54,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:47:54,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:47:54,849 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:47:54" (1/1) ... [2023-08-26 19:47:54,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2628ee84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:54, skipping insertion in model container [2023-08-26 19:47:54,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:47:54" (1/1) ... [2023-08-26 19:47:54,870 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:47:54,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:47:54,982 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:47:55,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:47:55,012 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:47:55,013 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:47:55,017 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:47:55,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55 WrapperNode [2023-08-26 19:47:55,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:47:55,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:47:55,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:47:55,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:47:55,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,057 INFO L138 Inliner]: procedures = 25, calls = 121, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 270 [2023-08-26 19:47:55,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:47:55,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:47:55,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:47:55,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:47:55,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,077 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:47:55,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:47:55,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:47:55,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:47:55,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (1/1) ... [2023-08-26 19:47:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:47:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:47:55,115 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 19:47:55,129 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 19:47:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:47:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:47:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 19:47:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 19:47:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:47:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-26 19:47:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-26 19:47:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-26 19:47:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-26 19:47:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:47:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:47:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:47:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:47:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:47:55,149 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 19:47:55,224 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:47:55,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:47:55,468 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:47:55,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:47:55,507 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 19:47:55,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:47:55 BoogieIcfgContainer [2023-08-26 19:47:55,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:47:55,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:47:55,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:47:55,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:47:55,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:47:54" (1/3) ... [2023-08-26 19:47:55,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c44d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:47:55, skipping insertion in model container [2023-08-26 19:47:55,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:55" (2/3) ... [2023-08-26 19:47:55,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c44d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:47:55, skipping insertion in model container [2023-08-26 19:47:55,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:47:55" (3/3) ... [2023-08-26 19:47:55,514 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-08-26 19:47:55,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:47:55,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-08-26 19:47:55,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:47:55,654 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-26 19:47:55,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 294 transitions, 660 flow [2023-08-26 19:47:55,795 INFO L124 PetriNetUnfolderBase]: 14/262 cut-off events. [2023-08-26 19:47:55,795 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 19:47:55,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 262 events. 14/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 529 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 221. Up to 3 conditions per place. [2023-08-26 19:47:55,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 294 transitions, 660 flow [2023-08-26 19:47:55,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 253 transitions, 554 flow [2023-08-26 19:47:55,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:47:55,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 253 transitions, 554 flow [2023-08-26 19:47:55,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 253 transitions, 554 flow [2023-08-26 19:47:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 253 transitions, 554 flow [2023-08-26 19:47:55,859 INFO L124 PetriNetUnfolderBase]: 14/253 cut-off events. [2023-08-26 19:47:55,859 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 19:47:55,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 253 events. 14/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 529 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 221. Up to 3 conditions per place. [2023-08-26 19:47:55,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 15256 [2023-08-26 19:47:59,246 INFO L134 LiptonReduction]: Checked pairs total: 100239 [2023-08-26 19:47:59,246 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-26 19:47:59,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:47:59,260 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;@665e0db4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:47:59,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-26 19:47:59,261 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:47:59,261 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:47:59,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:47:59,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:47:59,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:47:59,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:47:59,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:47:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1071, now seen corresponding path program 1 times [2023-08-26 19:47:59,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:47:59,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386695778] [2023-08-26 19:47:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:47:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:47:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:47:59,333 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 19:47:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:47:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386695778] [2023-08-26 19:47:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386695778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:47:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:47:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:47:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243964679] [2023-08-26 19:47:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:47:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:47:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:47:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:47:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:47:59,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 478 [2023-08-26 19:47:59,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 270 flow. Second operand has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 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 19:47:59,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:47:59,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 478 [2023-08-26 19:47:59,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:09,009 INFO L124 PetriNetUnfolderBase]: 130780/172893 cut-off events. [2023-08-26 19:48:09,009 INFO L125 PetriNetUnfolderBase]: For 10221/10221 co-relation queries the response was YES. [2023-08-26 19:48:09,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343740 conditions, 172893 events. 130780/172893 cut-off events. For 10221/10221 co-relation queries the response was YES. Maximal size of possible extension queue 8037. Compared 1148137 event pairs, 104620 based on Foata normal form. 0/90428 useless extension candidates. Maximal degree in co-relation 341232. Up to 157514 conditions per place. [2023-08-26 19:48:10,451 INFO L140 encePairwiseOnDemand]: 476/478 looper letters, 55 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2023-08-26 19:48:10,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 109 transitions, 376 flow [2023-08-26 19:48:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:48:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:48:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 571 transitions. [2023-08-26 19:48:10,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972803347280334 [2023-08-26 19:48:10,462 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 571 transitions. [2023-08-26 19:48:10,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 571 transitions. [2023-08-26 19:48:10,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:10,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 571 transitions. [2023-08-26 19:48:10,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 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 19:48:10,472 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 19:48:10,472 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 19:48:10,474 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 270 flow. Second operand 2 states and 571 transitions. [2023-08-26 19:48:10,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 109 transitions, 376 flow [2023-08-26 19:48:12,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 344 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-26 19:48:12,861 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 234 flow [2023-08-26 19:48:12,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-08-26 19:48:12,866 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2023-08-26 19:48:12,866 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 234 flow [2023-08-26 19:48:12,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 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 19:48:12,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:12,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:48:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:48:12,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:48:12,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1015631071, now seen corresponding path program 1 times [2023-08-26 19:48:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208123836] [2023-08-26 19:48:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:13,039 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 19:48:13,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:13,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208123836] [2023-08-26 19:48:13,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208123836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:48:13,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:48:13,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:48:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350930598] [2023-08-26 19:48:13,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:48:13,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:48:13,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:48:13,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:48:13,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 478 [2023-08-26 19:48:13,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 19:48:13,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:13,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 478 [2023-08-26 19:48:13,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:26,576 INFO L124 PetriNetUnfolderBase]: 191980/251517 cut-off events. [2023-08-26 19:48:26,577 INFO L125 PetriNetUnfolderBase]: For 1769/1769 co-relation queries the response was YES. [2023-08-26 19:48:27,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489909 conditions, 251517 events. 191980/251517 cut-off events. For 1769/1769 co-relation queries the response was YES. Maximal size of possible extension queue 9726. Compared 1678185 event pairs, 150313 based on Foata normal form. 0/141423 useless extension candidates. Maximal degree in co-relation 489906. Up to 226017 conditions per place. [2023-08-26 19:48:28,055 INFO L140 encePairwiseOnDemand]: 469/478 looper letters, 135 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2023-08-26 19:48:28,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 178 transitions, 671 flow [2023-08-26 19:48:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:48:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:48:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-08-26 19:48:28,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313807531380753 [2023-08-26 19:48:28,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-08-26 19:48:28,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-08-26 19:48:28,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:28,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-08-26 19:48:28,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 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 19:48:28,063 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 19:48:28,063 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 19:48:28,063 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 234 flow. Second operand 3 states and 762 transitions. [2023-08-26 19:48:28,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 178 transitions, 671 flow [2023-08-26 19:48:28,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 178 transitions, 671 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:48:28,067 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 290 flow [2023-08-26 19:48:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2023-08-26 19:48:28,068 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -9 predicate places. [2023-08-26 19:48:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 290 flow [2023-08-26 19:48:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 19:48:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:28,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:48:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:48:28,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:48:28,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1015631072, now seen corresponding path program 1 times [2023-08-26 19:48:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804968808] [2023-08-26 19:48:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:28,137 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 19:48:28,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804968808] [2023-08-26 19:48:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804968808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:48:28,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:48:28,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:48:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895413273] [2023-08-26 19:48:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:48:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:48:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:48:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:48:28,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 478 [2023-08-26 19:48:28,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 19:48:28,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:28,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 478 [2023-08-26 19:48:28,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:39,846 INFO L124 PetriNetUnfolderBase]: 191245/250446 cut-off events. [2023-08-26 19:48:39,847 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2023-08-26 19:48:40,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491515 conditions, 250446 events. 191245/250446 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 9708. Compared 1669790 event pairs, 154700 based on Foata normal form. 298/141341 useless extension candidates. Maximal degree in co-relation 491510. Up to 233141 conditions per place. [2023-08-26 19:48:41,520 INFO L140 encePairwiseOnDemand]: 475/478 looper letters, 76 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-08-26 19:48:41,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 440 flow [2023-08-26 19:48:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:48:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:48:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-26 19:48:41,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50278940027894 [2023-08-26 19:48:41,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-26 19:48:41,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-26 19:48:41,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:41,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-26 19:48:41,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 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 19:48:41,527 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 19:48:41,528 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 19:48:41,528 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 290 flow. Second operand 3 states and 721 transitions. [2023-08-26 19:48:41,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 440 flow [2023-08-26 19:48:41,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 113 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:48:41,538 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 274 flow [2023-08-26 19:48:41,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2023-08-26 19:48:41,540 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -11 predicate places. [2023-08-26 19:48:41,540 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 274 flow [2023-08-26 19:48:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 19:48:41,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:41,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:48:41,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:48:41,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:48:41,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1063908923, now seen corresponding path program 1 times [2023-08-26 19:48:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979086764] [2023-08-26 19:48:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:41,694 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 19:48:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979086764] [2023-08-26 19:48:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979086764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:48:41,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:48:41,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:48:41,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208759956] [2023-08-26 19:48:41,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:48:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:48:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:48:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:48:41,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 478 [2023-08-26 19:48:41,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 19:48:41,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:41,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 478 [2023-08-26 19:48:41,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:50,232 INFO L124 PetriNetUnfolderBase]: 141314/185926 cut-off events. [2023-08-26 19:48:50,233 INFO L125 PetriNetUnfolderBase]: For 2356/2356 co-relation queries the response was YES. [2023-08-26 19:48:50,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363952 conditions, 185926 events. 141314/185926 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 7313. Compared 1219189 event pairs, 113803 based on Foata normal form. 0/108738 useless extension candidates. Maximal degree in co-relation 363947. Up to 172912 conditions per place. [2023-08-26 19:48:51,288 INFO L140 encePairwiseOnDemand]: 476/478 looper letters, 74 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-08-26 19:48:51,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 422 flow [2023-08-26 19:48:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:48:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:48:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2023-08-26 19:48:51,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500697350069735 [2023-08-26 19:48:51,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2023-08-26 19:48:51,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2023-08-26 19:48:51,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:51,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2023-08-26 19:48:51,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 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 19:48:51,293 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 19:48:51,294 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 19:48:51,294 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 274 flow. Second operand 3 states and 718 transitions. [2023-08-26 19:48:51,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 422 flow [2023-08-26 19:48:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:48:51,300 INFO L231 Difference]: Finished difference. Result has 111 places, 112 transitions, 273 flow [2023-08-26 19:48:51,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=111, PETRI_TRANSITIONS=112} [2023-08-26 19:48:51,302 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -11 predicate places. [2023-08-26 19:48:51,302 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 112 transitions, 273 flow [2023-08-26 19:48:51,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 19:48:51,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:51,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:48:51,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:48:51,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:48:51,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1063908925, now seen corresponding path program 1 times [2023-08-26 19:48:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:51,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010839927] [2023-08-26 19:48:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:51,367 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 19:48:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010839927] [2023-08-26 19:48:51,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010839927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:48:51,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:48:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:48:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598982227] [2023-08-26 19:48:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:48:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:48:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:48:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:48:51,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 478 [2023-08-26 19:48:51,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 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 19:48:51,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:51,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 478 [2023-08-26 19:48:51,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:57,212 INFO L124 PetriNetUnfolderBase]: 94664/126087 cut-off events. [2023-08-26 19:48:57,213 INFO L125 PetriNetUnfolderBase]: For 2200/2200 co-relation queries the response was YES. [2023-08-26 19:48:57,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247728 conditions, 126087 events. 94664/126087 cut-off events. For 2200/2200 co-relation queries the response was YES. Maximal size of possible extension queue 4923. Compared 816507 event pairs, 72113 based on Foata normal form. 0/79375 useless extension candidates. Maximal degree in co-relation 247723. Up to 110195 conditions per place. [2023-08-26 19:48:57,872 INFO L140 encePairwiseOnDemand]: 471/478 looper letters, 134 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2023-08-26 19:48:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 180 transitions, 730 flow [2023-08-26 19:48:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:48:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:48:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-26 19:48:57,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202231520223152 [2023-08-26 19:48:57,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-26 19:48:57,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-26 19:48:57,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:57,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-26 19:48:57,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 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 19:48:57,896 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 19:48:57,897 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 19:48:57,897 INFO L175 Difference]: Start difference. First operand has 111 places, 112 transitions, 273 flow. Second operand 3 states and 746 transitions. [2023-08-26 19:48:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 180 transitions, 730 flow [2023-08-26 19:48:57,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 180 transitions, 729 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:48:57,900 INFO L231 Difference]: Finished difference. Result has 114 places, 120 transitions, 360 flow [2023-08-26 19:48:57,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=114, PETRI_TRANSITIONS=120} [2023-08-26 19:48:57,901 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -8 predicate places. [2023-08-26 19:48:57,901 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 120 transitions, 360 flow [2023-08-26 19:48:57,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 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 19:48:57,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:57,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:48:57,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:48:57,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:48:57,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 810967199, now seen corresponding path program 1 times [2023-08-26 19:48:57,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:57,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092635136] [2023-08-26 19:48:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:57,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:58,010 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 19:48:58,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:58,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092635136] [2023-08-26 19:48:58,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092635136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:48:58,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:48:58,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:48:58,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538285528] [2023-08-26 19:48:58,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:48:58,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:48:58,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:58,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:48:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:48:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 478 [2023-08-26 19:48:58,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 120 transitions, 360 flow. Second operand has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 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 19:48:58,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:58,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 478 [2023-08-26 19:48:58,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:03,028 INFO L124 PetriNetUnfolderBase]: 75020/103037 cut-off events. [2023-08-26 19:49:03,028 INFO L125 PetriNetUnfolderBase]: For 16299/16299 co-relation queries the response was YES. [2023-08-26 19:49:03,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215072 conditions, 103037 events. 75020/103037 cut-off events. For 16299/16299 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 715646 event pairs, 17323 based on Foata normal form. 0/71464 useless extension candidates. Maximal degree in co-relation 215066. Up to 83093 conditions per place. [2023-08-26 19:49:03,585 INFO L140 encePairwiseOnDemand]: 467/478 looper letters, 181 selfloop transitions, 13 changer transitions 0/224 dead transitions. [2023-08-26 19:49:03,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 224 transitions, 1052 flow [2023-08-26 19:49:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:49:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:49:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 959 transitions. [2023-08-26 19:49:03,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015690376569037 [2023-08-26 19:49:03,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 959 transitions. [2023-08-26 19:49:03,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 959 transitions. [2023-08-26 19:49:03,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:03,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 959 transitions. [2023-08-26 19:49:03,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 0 states have call successors, (0), 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 19:49:03,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:03,592 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:03,592 INFO L175 Difference]: Start difference. First operand has 114 places, 120 transitions, 360 flow. Second operand 4 states and 959 transitions. [2023-08-26 19:49:03,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 224 transitions, 1052 flow [2023-08-26 19:49:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 224 transitions, 1016 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:49:03,611 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 435 flow [2023-08-26 19:49:03,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2023-08-26 19:49:03,612 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -7 predicate places. [2023-08-26 19:49:03,612 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 435 flow [2023-08-26 19:49:03,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 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 19:49:03,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:03,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:03,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:49:03,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:03,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash -444197249, now seen corresponding path program 1 times [2023-08-26 19:49:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:03,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595198386] [2023-08-26 19:49:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:03,670 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 19:49:03,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:03,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595198386] [2023-08-26 19:49:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595198386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:03,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:49:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435900067] [2023-08-26 19:49:03,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:03,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:49:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:49:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:49:03,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 478 [2023-08-26 19:49:03,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 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 19:49:03,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:03,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 478 [2023-08-26 19:49:03,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:07,392 INFO L124 PetriNetUnfolderBase]: 52708/77486 cut-off events. [2023-08-26 19:49:07,392 INFO L125 PetriNetUnfolderBase]: For 21592/21592 co-relation queries the response was YES. [2023-08-26 19:49:07,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165376 conditions, 77486 events. 52708/77486 cut-off events. For 21592/21592 co-relation queries the response was YES. Maximal size of possible extension queue 2611. Compared 583262 event pairs, 12931 based on Foata normal form. 0/56242 useless extension candidates. Maximal degree in co-relation 165368. Up to 57568 conditions per place. [2023-08-26 19:49:07,951 INFO L140 encePairwiseOnDemand]: 468/478 looper letters, 149 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2023-08-26 19:49:07,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 196 transitions, 1018 flow [2023-08-26 19:49:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:49:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:49:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 922 transitions. [2023-08-26 19:49:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48221757322175735 [2023-08-26 19:49:07,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 922 transitions. [2023-08-26 19:49:07,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 922 transitions. [2023-08-26 19:49:07,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:07,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 922 transitions. [2023-08-26 19:49:07,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 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 19:49:07,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:07,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:07,958 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 435 flow. Second operand 4 states and 922 transitions. [2023-08-26 19:49:07,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 196 transitions, 1018 flow [2023-08-26 19:49:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1006 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:49:07,966 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 574 flow [2023-08-26 19:49:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=574, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2023-08-26 19:49:07,967 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -5 predicate places. [2023-08-26 19:49:07,967 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 574 flow [2023-08-26 19:49:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 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 19:49:07,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:07,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:07,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:49:07,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:07,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1750473079, now seen corresponding path program 1 times [2023-08-26 19:49:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341161487] [2023-08-26 19:49:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:08,012 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 19:49:08,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341161487] [2023-08-26 19:49:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341161487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:08,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:08,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:49:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138449728] [2023-08-26 19:49:08,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:08,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:49:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:49:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:49:08,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 478 [2023-08-26 19:49:08,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 574 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 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 19:49:08,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:08,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 478 [2023-08-26 19:49:08,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:11,183 INFO L124 PetriNetUnfolderBase]: 43501/64441 cut-off events. [2023-08-26 19:49:11,184 INFO L125 PetriNetUnfolderBase]: For 26424/26438 co-relation queries the response was YES. [2023-08-26 19:49:11,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142421 conditions, 64441 events. 43501/64441 cut-off events. For 26424/26438 co-relation queries the response was YES. Maximal size of possible extension queue 2130. Compared 481952 event pairs, 12644 based on Foata normal form. 0/50013 useless extension candidates. Maximal degree in co-relation 142411. Up to 48848 conditions per place. [2023-08-26 19:49:11,705 INFO L140 encePairwiseOnDemand]: 474/478 looper letters, 132 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2023-08-26 19:49:11,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 1057 flow [2023-08-26 19:49:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:49:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:49:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-26 19:49:11,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223152022315202 [2023-08-26 19:49:11,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-26 19:49:11,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-26 19:49:11,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:11,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-26 19:49:11,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 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 19:49:11,710 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 19:49:11,710 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 19:49:11,711 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 574 flow. Second operand 3 states and 749 transitions. [2023-08-26 19:49:11,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 1057 flow [2023-08-26 19:49:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1037 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:49:11,720 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 576 flow [2023-08-26 19:49:11,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=576, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2023-08-26 19:49:11,721 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -6 predicate places. [2023-08-26 19:49:11,721 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 576 flow [2023-08-26 19:49:11,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 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 19:49:11,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:11,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:49:11,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:11,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:11,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1750473078, now seen corresponding path program 1 times [2023-08-26 19:49:11,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:11,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761739884] [2023-08-26 19:49:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:11,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:11,743 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 19:49:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761739884] [2023-08-26 19:49:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761739884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:49:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089148003] [2023-08-26 19:49:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:49:11,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:49:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:49:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-08-26 19:49:11,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 19:49:11,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:11,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-08-26 19:49:11,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:14,872 INFO L124 PetriNetUnfolderBase]: 40988/61688 cut-off events. [2023-08-26 19:49:14,873 INFO L125 PetriNetUnfolderBase]: For 32344/32354 co-relation queries the response was YES. [2023-08-26 19:49:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138268 conditions, 61688 events. 40988/61688 cut-off events. For 32344/32354 co-relation queries the response was YES. Maximal size of possible extension queue 1991. Compared 470038 event pairs, 12022 based on Foata normal form. 0/48844 useless extension candidates. Maximal degree in co-relation 138258. Up to 39930 conditions per place. [2023-08-26 19:49:15,201 INFO L140 encePairwiseOnDemand]: 470/478 looper letters, 144 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2023-08-26 19:49:15,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1097 flow [2023-08-26 19:49:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:49:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:49:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2023-08-26 19:49:15,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188284518828452 [2023-08-26 19:49:15,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2023-08-26 19:49:15,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2023-08-26 19:49:15,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:15,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2023-08-26 19:49:15,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 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 19:49:15,206 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 19:49:15,206 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 19:49:15,206 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 576 flow. Second operand 3 states and 744 transitions. [2023-08-26 19:49:15,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1097 flow [2023-08-26 19:49:15,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 190 transitions, 1079 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:49:15,214 INFO L231 Difference]: Finished difference. Result has 118 places, 141 transitions, 704 flow [2023-08-26 19:49:15,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=118, PETRI_TRANSITIONS=141} [2023-08-26 19:49:15,215 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -4 predicate places. [2023-08-26 19:49:15,215 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 141 transitions, 704 flow [2023-08-26 19:49:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 19:49:15,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:15,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:49:15,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:15,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash -252055166, now seen corresponding path program 1 times [2023-08-26 19:49:15,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:15,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426710497] [2023-08-26 19:49:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:15,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:15,266 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 19:49:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426710497] [2023-08-26 19:49:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426710497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:15,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:49:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945594344] [2023-08-26 19:49:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:49:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:49:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:49:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 478 [2023-08-26 19:49:15,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 141 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 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 19:49:15,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:15,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 478 [2023-08-26 19:49:15,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:18,552 INFO L124 PetriNetUnfolderBase]: 40777/60372 cut-off events. [2023-08-26 19:49:18,552 INFO L125 PetriNetUnfolderBase]: For 37719/37779 co-relation queries the response was YES. [2023-08-26 19:49:18,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139169 conditions, 60372 events. 40777/60372 cut-off events. For 37719/37779 co-relation queries the response was YES. Maximal size of possible extension queue 1884. Compared 439040 event pairs, 11681 based on Foata normal form. 0/46363 useless extension candidates. Maximal degree in co-relation 139158. Up to 47939 conditions per place. [2023-08-26 19:49:18,858 INFO L140 encePairwiseOnDemand]: 474/478 looper letters, 140 selfloop transitions, 11 changer transitions 0/186 dead transitions. [2023-08-26 19:49:18,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 186 transitions, 1279 flow [2023-08-26 19:49:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:49:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:49:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-26 19:49:18,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202231520223152 [2023-08-26 19:49:18,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-26 19:49:18,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-26 19:49:18,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:18,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-26 19:49:18,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 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 19:49:18,863 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 19:49:18,863 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 19:49:18,863 INFO L175 Difference]: Start difference. First operand has 118 places, 141 transitions, 704 flow. Second operand 3 states and 746 transitions. [2023-08-26 19:49:18,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 186 transitions, 1279 flow [2023-08-26 19:49:18,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 186 transitions, 1235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:49:18,876 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 694 flow [2023-08-26 19:49:18,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2023-08-26 19:49:18,878 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -6 predicate places. [2023-08-26 19:49:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 694 flow [2023-08-26 19:49:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 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 19:49:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:49:18,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:18,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash -252055167, now seen corresponding path program 1 times [2023-08-26 19:49:18,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:18,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581582624] [2023-08-26 19:49:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:18,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:18,940 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 19:49:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581582624] [2023-08-26 19:49:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581582624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:49:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373710373] [2023-08-26 19:49:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:49:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:49:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:49:18,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-08-26 19:49:18,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 694 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 19:49:18,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:18,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-08-26 19:49:18,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:22,081 INFO L124 PetriNetUnfolderBase]: 39848/59393 cut-off events. [2023-08-26 19:49:22,081 INFO L125 PetriNetUnfolderBase]: For 40562/40568 co-relation queries the response was YES. [2023-08-26 19:49:22,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139090 conditions, 59393 events. 39848/59393 cut-off events. For 40562/40568 co-relation queries the response was YES. Maximal size of possible extension queue 1721. Compared 434324 event pairs, 11277 based on Foata normal form. 6/45945 useless extension candidates. Maximal degree in co-relation 139079. Up to 38389 conditions per place. [2023-08-26 19:49:22,419 INFO L140 encePairwiseOnDemand]: 470/478 looper letters, 150 selfloop transitions, 20 changer transitions 0/200 dead transitions. [2023-08-26 19:49:22,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 200 transitions, 1299 flow [2023-08-26 19:49:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:49:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:49:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-26 19:49:22,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174337517433751 [2023-08-26 19:49:22,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-26 19:49:22,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-26 19:49:22,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:22,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-26 19:49:22,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 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 19:49:22,424 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 19:49:22,424 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 19:49:22,424 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 694 flow. Second operand 3 states and 742 transitions. [2023-08-26 19:49:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 200 transitions, 1299 flow [2023-08-26 19:49:22,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 200 transitions, 1277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:49:22,432 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 902 flow [2023-08-26 19:49:22,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=902, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2023-08-26 19:49:22,432 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -4 predicate places. [2023-08-26 19:49:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 902 flow [2023-08-26 19:49:22,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 19:49:22,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:22,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:22,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 19:49:22,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:22,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash -738761812, now seen corresponding path program 1 times [2023-08-26 19:49:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:22,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949633292] [2023-08-26 19:49:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:22,582 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 19:49:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949633292] [2023-08-26 19:49:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949633292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:22,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:22,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:49:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245229936] [2023-08-26 19:49:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:22,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:49:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:49:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:49:22,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 478 [2023-08-26 19:49:22,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 902 flow. Second operand has 4 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 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 19:49:22,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:22,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 478 [2023-08-26 19:49:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:26,096 INFO L124 PetriNetUnfolderBase]: 39847/60886 cut-off events. [2023-08-26 19:49:26,096 INFO L125 PetriNetUnfolderBase]: For 48610/48614 co-relation queries the response was YES. [2023-08-26 19:49:26,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143743 conditions, 60886 events. 39847/60886 cut-off events. For 48610/48614 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 469613 event pairs, 9663 based on Foata normal form. 4/49543 useless extension candidates. Maximal degree in co-relation 143731. Up to 36696 conditions per place. [2023-08-26 19:49:26,411 INFO L140 encePairwiseOnDemand]: 470/478 looper letters, 190 selfloop transitions, 36 changer transitions 0/256 dead transitions. [2023-08-26 19:49:26,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 256 transitions, 1784 flow [2023-08-26 19:49:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:49:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:49:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 972 transitions. [2023-08-26 19:49:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083682008368201 [2023-08-26 19:49:26,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 972 transitions. [2023-08-26 19:49:26,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 972 transitions. [2023-08-26 19:49:26,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:26,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 972 transitions. [2023-08-26 19:49:26,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 19:49:26,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:26,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 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 19:49:26,416 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 902 flow. Second operand 4 states and 972 transitions. [2023-08-26 19:49:26,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 256 transitions, 1784 flow [2023-08-26 19:49:26,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 256 transitions, 1720 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:49:26,429 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1142 flow [2023-08-26 19:49:26,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1142, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2023-08-26 19:49:26,429 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 0 predicate places. [2023-08-26 19:49:26,429 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1142 flow [2023-08-26 19:49:26,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 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 19:49:26,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:26,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 19:49:26,430 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:26,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1426358259, now seen corresponding path program 1 times [2023-08-26 19:49:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:26,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510898721] [2023-08-26 19:49:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:26,520 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 19:49:26,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:26,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510898721] [2023-08-26 19:49:26,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510898721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:26,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:26,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:49:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414882146] [2023-08-26 19:49:26,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:26,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:49:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:49:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:49:26,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 478 [2023-08-26 19:49:26,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1142 flow. Second operand has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 19:49:26,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:26,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 478 [2023-08-26 19:49:26,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:30,095 INFO L124 PetriNetUnfolderBase]: 38807/58762 cut-off events. [2023-08-26 19:49:30,096 INFO L125 PetriNetUnfolderBase]: For 58517/58525 co-relation queries the response was YES. [2023-08-26 19:49:30,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141669 conditions, 58762 events. 38807/58762 cut-off events. For 58517/58525 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 446919 event pairs, 10652 based on Foata normal form. 445/48186 useless extension candidates. Maximal degree in co-relation 141655. Up to 36259 conditions per place. [2023-08-26 19:49:30,399 INFO L140 encePairwiseOnDemand]: 469/478 looper letters, 178 selfloop transitions, 42 changer transitions 0/250 dead transitions. [2023-08-26 19:49:30,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 250 transitions, 1848 flow [2023-08-26 19:49:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:49:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:49:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1157 transitions. [2023-08-26 19:49:30,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48410041841004187 [2023-08-26 19:49:30,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1157 transitions. [2023-08-26 19:49:30,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1157 transitions. [2023-08-26 19:49:30,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:30,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1157 transitions. [2023-08-26 19:49:30,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 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 19:49:30,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 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 19:49:30,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 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 19:49:30,406 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1142 flow. Second operand 5 states and 1157 transitions. [2023-08-26 19:49:30,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 250 transitions, 1848 flow [2023-08-26 19:49:30,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 250 transitions, 1846 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 19:49:30,438 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1296 flow [2023-08-26 19:49:30,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1296, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2023-08-26 19:49:30,439 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 6 predicate places. [2023-08-26 19:49:30,439 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1296 flow [2023-08-26 19:49:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 19:49:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:30,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 19:49:30,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:30,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1999342044, now seen corresponding path program 1 times [2023-08-26 19:49:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097736114] [2023-08-26 19:49:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:30,576 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 19:49:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097736114] [2023-08-26 19:49:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097736114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:49:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532064862] [2023-08-26 19:49:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:49:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:49:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:49:30,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 478 [2023-08-26 19:49:30,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1296 flow. Second operand has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 0 states have call successors, (0), 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 19:49:30,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:30,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 478 [2023-08-26 19:49:30,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:34,298 INFO L124 PetriNetUnfolderBase]: 38181/56800 cut-off events. [2023-08-26 19:49:34,298 INFO L125 PetriNetUnfolderBase]: For 69788/69788 co-relation queries the response was YES. [2023-08-26 19:49:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138815 conditions, 56800 events. 38181/56800 cut-off events. For 69788/69788 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 411121 event pairs, 23020 based on Foata normal form. 0/44880 useless extension candidates. Maximal degree in co-relation 138798. Up to 33567 conditions per place. [2023-08-26 19:49:34,620 INFO L140 encePairwiseOnDemand]: 467/478 looper letters, 280 selfloop transitions, 58 changer transitions 0/368 dead transitions. [2023-08-26 19:49:34,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 368 transitions, 2687 flow [2023-08-26 19:49:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:49:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:49:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1868 transitions. [2023-08-26 19:49:34,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884937238493724 [2023-08-26 19:49:34,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1868 transitions. [2023-08-26 19:49:34,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1868 transitions. [2023-08-26 19:49:34,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:34,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1868 transitions. [2023-08-26 19:49:34,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 233.5) internal successors, (1868), 8 states have internal predecessors, (1868), 0 states have call successors, (0), 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 19:49:34,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 478.0) internal successors, (4302), 9 states have internal predecessors, (4302), 0 states have call successors, (0), 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 19:49:34,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 478.0) internal successors, (4302), 9 states have internal predecessors, (4302), 0 states have call successors, (0), 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 19:49:34,630 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1296 flow. Second operand 8 states and 1868 transitions. [2023-08-26 19:49:34,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 368 transitions, 2687 flow [2023-08-26 19:49:34,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 368 transitions, 2648 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-26 19:49:34,675 INFO L231 Difference]: Finished difference. Result has 138 places, 179 transitions, 1622 flow [2023-08-26 19:49:34,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1622, PETRI_PLACES=138, PETRI_TRANSITIONS=179} [2023-08-26 19:49:34,675 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 16 predicate places. [2023-08-26 19:49:34,675 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 179 transitions, 1622 flow [2023-08-26 19:49:34,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 0 states have call successors, (0), 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 19:49:34,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:34,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 19:49:34,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:34,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1282255337, now seen corresponding path program 1 times [2023-08-26 19:49:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389338901] [2023-08-26 19:49:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:34,850 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 19:49:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389338901] [2023-08-26 19:49:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389338901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:49:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835846897] [2023-08-26 19:49:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:49:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:49:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:49:34,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 478 [2023-08-26 19:49:34,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 179 transitions, 1622 flow. Second operand has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 19:49:34,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:34,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 478 [2023-08-26 19:49:34,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:38,697 INFO L124 PetriNetUnfolderBase]: 38517/57553 cut-off events. [2023-08-26 19:49:38,697 INFO L125 PetriNetUnfolderBase]: For 94644/94648 co-relation queries the response was YES. [2023-08-26 19:49:38,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146267 conditions, 57553 events. 38517/57553 cut-off events. For 94644/94648 co-relation queries the response was YES. Maximal size of possible extension queue 1705. Compared 421728 event pairs, 8932 based on Foata normal form. 225/46278 useless extension candidates. Maximal degree in co-relation 146246. Up to 33000 conditions per place. [2023-08-26 19:49:39,076 INFO L140 encePairwiseOnDemand]: 467/478 looper letters, 274 selfloop transitions, 72 changer transitions 0/376 dead transitions. [2023-08-26 19:49:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 376 transitions, 3303 flow [2023-08-26 19:49:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:49:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:49:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1641 transitions. [2023-08-26 19:49:39,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49043634190077706 [2023-08-26 19:49:39,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1641 transitions. [2023-08-26 19:49:39,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1641 transitions. [2023-08-26 19:49:39,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:39,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1641 transitions. [2023-08-26 19:49:39,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 234.42857142857142) internal successors, (1641), 7 states have internal predecessors, (1641), 0 states have call successors, (0), 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 19:49:39,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 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 19:49:39,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 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 19:49:39,084 INFO L175 Difference]: Start difference. First operand has 138 places, 179 transitions, 1622 flow. Second operand 7 states and 1641 transitions. [2023-08-26 19:49:39,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 376 transitions, 3303 flow [2023-08-26 19:49:39,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 376 transitions, 3265 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-26 19:49:39,194 INFO L231 Difference]: Finished difference. Result has 147 places, 207 transitions, 2290 flow [2023-08-26 19:49:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2290, PETRI_PLACES=147, PETRI_TRANSITIONS=207} [2023-08-26 19:49:39,194 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 25 predicate places. [2023-08-26 19:49:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 207 transitions, 2290 flow [2023-08-26 19:49:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 19:49:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:39,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 19:49:39,195 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:39,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1708912928, now seen corresponding path program 1 times [2023-08-26 19:49:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:39,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879904818] [2023-08-26 19:49:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:39,315 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 19:49:39,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:39,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879904818] [2023-08-26 19:49:39,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879904818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:39,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:39,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:49:39,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823778605] [2023-08-26 19:49:39,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:39,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:49:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:49:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:49:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 478 [2023-08-26 19:49:39,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 207 transitions, 2290 flow. Second operand has 7 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 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 19:49:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 478 [2023-08-26 19:49:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:43,564 INFO L124 PetriNetUnfolderBase]: 38091/58032 cut-off events. [2023-08-26 19:49:43,565 INFO L125 PetriNetUnfolderBase]: For 120160/120168 co-relation queries the response was YES. [2023-08-26 19:49:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151369 conditions, 58032 events. 38091/58032 cut-off events. For 120160/120168 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 446073 event pairs, 10102 based on Foata normal form. 279/48249 useless extension candidates. Maximal degree in co-relation 151345. Up to 35659 conditions per place. [2023-08-26 19:49:44,161 INFO L140 encePairwiseOnDemand]: 464/478 looper letters, 262 selfloop transitions, 92 changer transitions 0/384 dead transitions. [2023-08-26 19:49:44,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 384 transitions, 3722 flow [2023-08-26 19:49:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:49:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:49:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2015 transitions. [2023-08-26 19:49:44,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683867968386797 [2023-08-26 19:49:44,168 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2015 transitions. [2023-08-26 19:49:44,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2015 transitions. [2023-08-26 19:49:44,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:44,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2015 transitions. [2023-08-26 19:49:44,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.88888888888889) internal successors, (2015), 9 states have internal predecessors, (2015), 0 states have call successors, (0), 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 19:49:44,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 478.0) internal successors, (4780), 10 states have internal predecessors, (4780), 0 states have call successors, (0), 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 19:49:44,202 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 478.0) internal successors, (4780), 10 states have internal predecessors, (4780), 0 states have call successors, (0), 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 19:49:44,202 INFO L175 Difference]: Start difference. First operand has 147 places, 207 transitions, 2290 flow. Second operand 9 states and 2015 transitions. [2023-08-26 19:49:44,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 384 transitions, 3722 flow [2023-08-26 19:49:44,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 384 transitions, 3716 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 19:49:44,347 INFO L231 Difference]: Finished difference. Result has 158 places, 224 transitions, 2834 flow [2023-08-26 19:49:44,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2834, PETRI_PLACES=158, PETRI_TRANSITIONS=224} [2023-08-26 19:49:44,348 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 36 predicate places. [2023-08-26 19:49:44,348 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 224 transitions, 2834 flow [2023-08-26 19:49:44,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 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 19:49:44,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:44,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 19:49:44,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:44,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1096133210, now seen corresponding path program 1 times [2023-08-26 19:49:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:44,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057602991] [2023-08-26 19:49:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:44,510 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 19:49:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057602991] [2023-08-26 19:49:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057602991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:44,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:44,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:49:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762990907] [2023-08-26 19:49:44,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:44,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:49:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:49:44,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:49:44,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 478 [2023-08-26 19:49:44,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 224 transitions, 2834 flow. Second operand has 7 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 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 19:49:44,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:44,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 478 [2023-08-26 19:49:44,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:48,893 INFO L124 PetriNetUnfolderBase]: 38468/57799 cut-off events. [2023-08-26 19:49:48,893 INFO L125 PetriNetUnfolderBase]: For 170009/170017 co-relation queries the response was YES. [2023-08-26 19:49:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156880 conditions, 57799 events. 38468/57799 cut-off events. For 170009/170017 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 427499 event pairs, 8830 based on Foata normal form. 229/46653 useless extension candidates. Maximal degree in co-relation 156853. Up to 32564 conditions per place. [2023-08-26 19:49:49,333 INFO L140 encePairwiseOnDemand]: 464/478 looper letters, 302 selfloop transitions, 101 changer transitions 0/433 dead transitions. [2023-08-26 19:49:49,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 433 transitions, 4703 flow [2023-08-26 19:49:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:49:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:49:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2236 transitions. [2023-08-26 19:49:49,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46778242677824267 [2023-08-26 19:49:49,337 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2236 transitions. [2023-08-26 19:49:49,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2236 transitions. [2023-08-26 19:49:49,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:49,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2236 transitions. [2023-08-26 19:49:49,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 223.6) internal successors, (2236), 10 states have internal predecessors, (2236), 0 states have call successors, (0), 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 19:49:49,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 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 19:49:49,343 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 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 19:49:49,344 INFO L175 Difference]: Start difference. First operand has 158 places, 224 transitions, 2834 flow. Second operand 10 states and 2236 transitions. [2023-08-26 19:49:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 433 transitions, 4703 flow [2023-08-26 19:49:49,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 433 transitions, 4611 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-26 19:49:49,660 INFO L231 Difference]: Finished difference. Result has 167 places, 243 transitions, 3461 flow [2023-08-26 19:49:49,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3461, PETRI_PLACES=167, PETRI_TRANSITIONS=243} [2023-08-26 19:49:49,661 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 45 predicate places. [2023-08-26 19:49:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 243 transitions, 3461 flow [2023-08-26 19:49:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 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 19:49:49,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:49,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:49,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 19:49:49,662 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:49,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 125493469, now seen corresponding path program 1 times [2023-08-26 19:49:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822192698] [2023-08-26 19:49:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:49,755 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 19:49:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822192698] [2023-08-26 19:49:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822192698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:49,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:49,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:49:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432629504] [2023-08-26 19:49:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:49:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:49:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:49:49,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 478 [2023-08-26 19:49:49,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 243 transitions, 3461 flow. Second operand has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 0 states have call successors, (0), 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 19:49:49,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:49,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 478 [2023-08-26 19:49:49,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:54,431 INFO L124 PetriNetUnfolderBase]: 38248/58227 cut-off events. [2023-08-26 19:49:54,432 INFO L125 PetriNetUnfolderBase]: For 202404/202412 co-relation queries the response was YES. [2023-08-26 19:49:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160413 conditions, 58227 events. 38248/58227 cut-off events. For 202404/202412 co-relation queries the response was YES. Maximal size of possible extension queue 1732. Compared 438455 event pairs, 9392 based on Foata normal form. 210/46875 useless extension candidates. Maximal degree in co-relation 160384. Up to 32684 conditions per place. [2023-08-26 19:49:54,861 INFO L140 encePairwiseOnDemand]: 464/478 looper letters, 260 selfloop transitions, 93 changer transitions 0/383 dead transitions. [2023-08-26 19:49:54,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 383 transitions, 4902 flow [2023-08-26 19:49:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:49:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:49:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1422 transitions. [2023-08-26 19:49:54,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49581589958158995 [2023-08-26 19:49:54,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1422 transitions. [2023-08-26 19:49:54,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1422 transitions. [2023-08-26 19:49:54,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:54,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1422 transitions. [2023-08-26 19:49:54,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 19:49:54,868 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 19:49:54,868 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 19:49:54,868 INFO L175 Difference]: Start difference. First operand has 167 places, 243 transitions, 3461 flow. Second operand 6 states and 1422 transitions. [2023-08-26 19:49:54,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 383 transitions, 4902 flow [2023-08-26 19:49:55,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 383 transitions, 4843 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-08-26 19:49:55,135 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 4005 flow [2023-08-26 19:49:55,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4005, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2023-08-26 19:49:55,135 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 52 predicate places. [2023-08-26 19:49:55,135 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 4005 flow [2023-08-26 19:49:55,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 0 states have call successors, (0), 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 19:49:55,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:55,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:55,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 19:49:55,136 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:49:55,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 253745698, now seen corresponding path program 1 times [2023-08-26 19:49:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:55,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792380522] [2023-08-26 19:49:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:55,236 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 19:49:55,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792380522] [2023-08-26 19:49:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792380522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:49:55,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:49:55,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:49:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381100905] [2023-08-26 19:49:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:49:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:49:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:49:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:49:55,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-26 19:49:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 4005 flow. Second operand has 7 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 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 19:49:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:55,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-26 19:49:55,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:50:03,722 INFO L124 PetriNetUnfolderBase]: 68393/101404 cut-off events. [2023-08-26 19:50:03,723 INFO L125 PetriNetUnfolderBase]: For 376576/376595 co-relation queries the response was YES. [2023-08-26 19:50:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278834 conditions, 101404 events. 68393/101404 cut-off events. For 376576/376595 co-relation queries the response was YES. Maximal size of possible extension queue 3336. Compared 787699 event pairs, 27564 based on Foata normal form. 298/81907 useless extension candidates. Maximal degree in co-relation 278802. Up to 32144 conditions per place. [2023-08-26 19:50:04,731 INFO L140 encePairwiseOnDemand]: 461/478 looper letters, 357 selfloop transitions, 130 changer transitions 0/517 dead transitions. [2023-08-26 19:50:04,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 517 transitions, 7035 flow [2023-08-26 19:50:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:50:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:50:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2092 transitions. [2023-08-26 19:50:04,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48628544862854484 [2023-08-26 19:50:04,735 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2092 transitions. [2023-08-26 19:50:04,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2092 transitions. [2023-08-26 19:50:04,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:50:04,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2092 transitions. [2023-08-26 19:50:04,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 232.44444444444446) internal successors, (2092), 9 states have internal predecessors, (2092), 0 states have call successors, (0), 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 19:50:04,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 478.0) internal successors, (4780), 10 states have internal predecessors, (4780), 0 states have call successors, (0), 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 19:50:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 478.0) internal successors, (4780), 10 states have internal predecessors, (4780), 0 states have call successors, (0), 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 19:50:04,741 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 4005 flow. Second operand 9 states and 2092 transitions. [2023-08-26 19:50:04,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 517 transitions, 7035 flow [2023-08-26 19:50:05,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 517 transitions, 6959 flow, removed 38 selfloop flow, removed 0 redundant places. [2023-08-26 19:50:05,991 INFO L231 Difference]: Finished difference. Result has 187 places, 312 transitions, 5859 flow [2023-08-26 19:50:05,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5859, PETRI_PLACES=187, PETRI_TRANSITIONS=312} [2023-08-26 19:50:05,991 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 65 predicate places. [2023-08-26 19:50:05,992 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 312 transitions, 5859 flow [2023-08-26 19:50:05,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 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 19:50:05,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:50:05,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:50:05,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 19:50:05,992 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:50:05,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:50:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1449994828, now seen corresponding path program 2 times [2023-08-26 19:50:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:50:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590631604] [2023-08-26 19:50:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:50:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:50:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:50:06,110 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 19:50:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:50:06,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590631604] [2023-08-26 19:50:06,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590631604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:50:06,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:50:06,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:50:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364162453] [2023-08-26 19:50:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:50:06,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:50:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:50:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:50:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:50:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-26 19:50:06,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 312 transitions, 5859 flow. Second operand has 7 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 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 19:50:06,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:50:06,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-26 19:50:06,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:50:16,204 INFO L124 PetriNetUnfolderBase]: 70379/107122 cut-off events. [2023-08-26 19:50:16,204 INFO L125 PetriNetUnfolderBase]: For 490425/490463 co-relation queries the response was YES. [2023-08-26 19:50:17,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302510 conditions, 107122 events. 70379/107122 cut-off events. For 490425/490463 co-relation queries the response was YES. Maximal size of possible extension queue 3384. Compared 879144 event pairs, 15688 based on Foata normal form. 315/88495 useless extension candidates. Maximal degree in co-relation 302473. Up to 64288 conditions per place. [2023-08-26 19:50:17,403 INFO L140 encePairwiseOnDemand]: 459/478 looper letters, 401 selfloop transitions, 187 changer transitions 0/618 dead transitions. [2023-08-26 19:50:17,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 618 transitions, 8974 flow [2023-08-26 19:50:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:50:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:50:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2766 transitions. [2023-08-26 19:50:17,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48221757322175735 [2023-08-26 19:50:17,409 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2766 transitions. [2023-08-26 19:50:17,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2766 transitions. [2023-08-26 19:50:17,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:50:17,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2766 transitions. [2023-08-26 19:50:17,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.5) internal successors, (2766), 12 states have internal predecessors, (2766), 0 states have call successors, (0), 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 19:50:17,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 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 19:50:17,441 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 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 19:50:17,441 INFO L175 Difference]: Start difference. First operand has 187 places, 312 transitions, 5859 flow. Second operand 12 states and 2766 transitions. [2023-08-26 19:50:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 618 transitions, 8974 flow [2023-08-26 19:50:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 618 transitions, 8896 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:50:18,819 INFO L231 Difference]: Finished difference. Result has 202 places, 355 transitions, 7448 flow [2023-08-26 19:50:18,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7448, PETRI_PLACES=202, PETRI_TRANSITIONS=355} [2023-08-26 19:50:18,819 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, 80 predicate places. [2023-08-26 19:50:18,819 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 355 transitions, 7448 flow [2023-08-26 19:50:18,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 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 19:50:18,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:50:18,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:50:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 19:50:18,820 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 19:50:18,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:50:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -227782595, now seen corresponding path program 1 times [2023-08-26 19:50:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:50:18,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950602439] [2023-08-26 19:50:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:50:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:50:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:50:18,953 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 19:50:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:50:18,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950602439] [2023-08-26 19:50:18,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950602439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:50:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:50:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:50:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011508083] [2023-08-26 19:50:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:50:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:50:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:50:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:50:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:50:18,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-26 19:50:18,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 355 transitions, 7448 flow. Second operand has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 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 19:50:18,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:50:18,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-26 19:50:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand